JPS6048824B2 - magnetic recording and reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic recording/reproducing device in which, for example, a small-sized electronic computer and a small-sized magnetic recording/reproducing device are housed in the same housing.

Recently, for example, an electronic desktop calculator and an ultra-small magnetic recording/reproducing device called a micro cassette tape recorder have been housed in the same housing, and by cleverly utilizing the functions of the calculator, the display section can display the ultra-small magnetic recording device. 2. Description of the Related Art Magnetic recording and reproducing apparatuses have been proposed that selectively display the amount of tape travel of the recording and reproducing apparatus.

In such a magnetic recording/reproducing device, for example, the playback start position and stop position are set by key operations on the keyboard of the computer, and the tape is fast-forwarded by the playback operation until the playback start position and the tape count value match. If they match, the tape is played at a constant speed and played.
Thereafter, when the stop position and the tape count value match, the tape running is stopped. However, in the case of rewinding, fast forwarding, and recording operations, only the stop position can be set. Here, the above-mentioned settings are performed using the numeric keys ~■ and setting keys corresponding to the purpose of setting.
By the way, for example, if you wish to play from the tape count value ``a'' and perform the playback operation by setting the playback start position ``a'' by key operation on the keyboard, the set value of the playback start position `` If you do not notice that 'a'' is smaller than the tape count value at the time of setting,
Fast-forwarding continues until the end of the tape, which causes the player to move away from the desired playback position, and when he realizes it, he has to redo the correct operation, which is extremely inconvenient and wastes time. This invention was made in view of the above circumstances, and its purpose is to calculate the count value of a counting means that counts pulses generated as the tape runs, and the start of playback set by key operations on a keyboard. A determination means is provided to compare and determine the magnitude of the position with a set value, and when the reproduction start position is set, the determination means determines that the set q value of the reproduction start position is smaller than the count value; It is an object of the present invention to provide a magnetic recording/reproducing device which can prevent erroneous operations at the time of key operation by setting an error state based on this determination result, and which greatly improves operability.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a magnetic recording and reproducing device according to the present invention, for example, a small electronic computer for office use (so-called electronic desktop calculator) and a small magnetic recording and reproducing device for memo use (so-called micro cassette tape recorder) in the same housing. This figure schematically shows the external appearance of a magnetic recording and reproducing device with an electronic computer housed in a computer. In the lower front part of the housing 1,
A calculation power switch 2, a changeover switch 3 for selecting a computer mode (CAL) or a tape count mode (TAPE), a keyboard 4, a display section 5 for digitally displaying calculation results, tape count values, etc. are provided.
Further, the upper front portion of the housing 1 is a bar 6 that can be opened and closed, and by opening and closing this cover 6, a microcassette magnetic tape can be attached and detached. The cover 6 is provided with a see-through window 7 through which the state of the loaded magnetic tape can be viewed, and a sound release hole 8 for releasing the playback tube to the outside. On the other hand, on the right side of the housing 1, which corresponds to the cover 6, there are operation knobs 9 for playback (PLAY), playback fast forward (F.F.), stop, rewind (REV.), and recording operations. Button (REC.) 1
0 is set.

FIG. 2 shows in detail the internal frame structure accommodated in the housing 1 corresponding to the cover 6, which is configured as follows, for example. That is, FIG. 2 is in a stopped state. For playback, slide the operating knob 9 from position A (stop) shown in the figure to position B (playback) shown in the figure. It is integrated with the operation knob 9 by pressing the button. The operation knob lever 11 slides along guide shafts 13a, 13b inserted into elongated holes 12a, 12b provided at the left end and approximately at the center thereof.
Due to this sliding, the pin 15 fixed to the tip of the support plate 14, which swings about the guide shaft 13a as two fulcrums,
It slides along the protrusion 11a of the operating knob lever 11, and is pressed against the protrusion 11a by the action of the leaf spring 16. As a result, the operation knob lever 11 is placed in a locked state.
4 On the other hand, as the operation knob lever 11 slides, the switch shaft 17 integrated with the operation knob lever 11 also slides, and the power source of the switch mechanism 18 is turned off. Inch 18a is turned on.

When turned on, the motor 19 starts rotating at a constant speed, and this rotation is transmitted to the flyhole 21 via the endless belt 20. On the other hand, the support plate 22, which is integrally formed with the fly hole 21, is connected to the operation knob and the protrusion 1 of the bar 11.
It is released from the locked state by 1b and rotates about the shaft 22a by the tensile force of the spring 23. As a result, the flyhole shaft 21a of the flyhole 21 comes into pressure contact with the outer circumferential surface of the take-up reel stand 24, the take-up reel shaft 24a of the take-up reel stand 24 starts to rotate, and the winding of the unwind reel stand 25 starts rotating. The magnetic tape set on the return reel shaft 25a and hooked to the take-up reel shaft 24a via the magnetic head 26 is fed sequentially, and the magnetic tape
The signal is converted into an electrical signal and playback begins. By further sliding the operation knob 9 in the direction of arrow C in the figure, the fast-forward switch 18b of the switch mechanism 18 is turned on again by the switch shaft 17, and the motor 19 changes from constant speed rotation to high speed rotation, as will be described later. Playback is fast forwarded to the so-called α-king state. Next, for recording, press the record button 1
0 in the direction of the arrow E shown in the figure, the recording button 10 is pressed.
The recording lever 27 integrated with slides, and this recording lever 27 slides into the protrusion 2? a engages with the protrusion 28a of the lock plate 28, resulting in a locked state.

Furthermore, by sliding the recording lever 27, the erasing head 29 is rotated about a shaft 29a.
As a result, the demagnetizing magnet 29b embedded in the erasing head 29 comes into close contact with the magnetic tape. Furthermore, when the erasing head 29 rotates, the recording/reproducing changeover switch 30 linked therewith operates in the direction of arrow F in the figure, and the amplifier circuit (not shown) and the magnetic head 26 are switched to the recording state. In this state, recording is started by locking the operation knob 9 to the B position shown in the figure, as described above. Next, when rewinding the magnetic tape, by sliding the operating knob 9 in the direction of the arrow D in the figure, the operating knob lever 11 also slides, and the protrusion 11b of the operating knob lever 11 causes the support plate 22 to pivot. It rotates about 22a in the opposite direction to that during playback. Due to this rotation, the support plate 2
Gear 21 of fly hole 21 configured integrally with 2
b engages with the rewind idler 31. This rewind idler 31 is engaged with the rewind reel stand 25. On the other hand, while the operation knob 9 is being slid, the switch shaft 1
7 also slides, and the power switch 18a is turned on. As a result, the motor 19 rotates at high speed, and the rotation is transmitted to the flyhole 21 via the endless belt 20 as described above! be done. The rewind reel stand 25, ie, the rewind reel shaft 25a, rotates, thereby causing the magnetic tape to be fed in reverse and rewinding. Also, by sliding the switch shaft 17, the rewind switch 18c of the switch mechanism 18 is newly turned on, and based on the on/off of the rewind switch 18c, the tape count is added as described below. It is designed to determine whether to perform subtraction processing and control it. In addition, when the recording button 10 is locked, the operation knob 9 can be moved to the direction indicated by the arrow D as described above.
When rewinding is performed by sliding in the direction, the lock plate 28 rotates about the shaft 28b due to the action of the projection 11c of the operating knob lever 11 accompanying this sliding. As a result, the projections 27a and 28a are disengaged, and the recording button 10 is released from the locked state due to the tensile force of the spring 32. At the same time, the amplifier circuit (not shown) and the magnetic head 26 are switched to the reproduction state. As shown in FIGS. 3A and 3B, for example, a magnet (permanent magnet) 33 is fixed to the take-up reel shaft 24a, and this magnet 33 is connected to the disc-shaped take-up reel shaft 24a. They are designed to rotate as one.

A reed switch 34 is disposed on the outer periphery of the magnet 33 in close proximity thereto. The reed switch 34 is turned on and off by changes in the magnetic field generated as the magnet 33 rotates.
3, that is, when the take-up reel shaft 24a rotates once, on-off is repeated twice. The on-off output of the reed switch 34 becomes a pulse corresponding to the rotation of the reel, that is, a pulse corresponding to the amount of tape travel, and this pulse is counted as described later to process the tape count (counting the amount of tape travel). Figure 4 schematically shows the circuit configuration of the main part of the computer-equipped magnetic nail reproducing device according to the present invention, which is configured as follows, for example. Ru.

That is, 35 is a DC power source, such as a battery, for supplying operating voltage to the display section 5, motor 19, arithmetic control section 36, and the like. The battery 35 is connected to a drive control section 37 and a booster circuit 38 via a power switch 18a and a calculation power switch 2, respectively. The above drive control section 3? is motor 1 as described later.
This controls the rotation of 9. In addition, the booster circuit 3
8 sets the DC voltage +V of the battery 35 to a predetermined voltage +VD)-
It boosts the voltage to VK and +VF and outputs it. These boosted voltages +VD and -VK are applied to the arithmetic control section 36.
Then, the voltage +VF is supplied to the display section 5. Here, the voltages +VD) -VK and +VF are respectively calculated by the calculation control unit 36.
, the lighting voltage of the display section 5, and the filament voltage of the display section 5. When the voltages +VD and -VK are supplied, the arithmetic control section 36 outputs the digit signals D1 to D9 whose ``o'' level is -VK and the ``1'' level is +VD to the display section 5 and It is designed to be output to the key input section 39. This key input section 39 inputs the digit signals D, -D. The key signal input terminals K, , K of the arithmetic control section 36 serve as key signals to be described later. ,K4,K. This is what is output to. Based on the key signal, the arithmetic control unit 36 performs various arithmetic processes (at least four arithmetic operations and other necessary arithmetic operations) or counting according to the operation state according to a pre-stored sequence program. It performs processing, stores the results or necessary information, and outputs segment signals Sa to Sg, Sdp, which will be described later, in synchronization with the digit signals D to D9 to the display section 5 to display predetermined characters and other information. The signal etc. are dynamically displayed, and the drive control section 3?
The control signal MS and MF are output to the motor 19 to control the rotation of the motor 19. For example, the control signal MS and MF are output to the motor 19.
SI). Further, one end of the fast-forward switch 18b is connected to the drive control section 37, and the other end of this switch 18b is grounded. The details of the control of the motor 19 by the drive control section 37 are, for example, as follows.

That is, when the power switch 18a is off (at this time, the fast forward switch 18b is also off), the voltage +
Since V is not supplied, motor 19 is stopped regardless of the states of control signals MS and MF. Further, even when the power switch 18a is turned on and the control signal MS becomes ``1'' level (hereinafter simply referred to as MS-0N), the transistor 40 is turned on and the transistors 41 and 42 are turned off, and thereby Fast forward switch 18b and control signal ■
The motor 19 is stopped regardless of the state j. In this state, the control signal MS is at ``0'' level (hereinafter simply referred to as M
S-0FF), if the fast-forward switch 18b is off and MF-0FF, the transistors 40,4
3 is turned off and transistors 41, 42, and 44 are turned on, thereby causing the motor 19 to rotate at a constant speed. - way,
If the fast-forward switch 18b is on or I-0N (at this time, the transistor 43 is on), the transistors 40,
44 is turned off, transistors 41 and 42 are turned on,
The motor 19 is designed to rotate at high speed. FIG. 5 shows the circuit configuration of the key input section 39 in detail.
For example, it is structured as follows.

That is, this key input section 39 is mainly composed of the keyboard 4, which has eight row lines (hereinafter simply D, to D, rows) into which the digit signals D, to D8 are input. line) and input terminals K, , K of the calculation control section 36. , K, are connected to three column lines (
Hereafter simply K,,K. , K. At each intersection point of a matrix consisting of column lines (referred to as column lines), there are numeric keys such as [0 to 9], [÷, ×, 1, +, etc.] as shown. , %, V ], command keys such as [CM)RM, . Memory keys 4a to 4d such as M-, M+] and clear keys 4 such as [C/CE]
Provide a calculation key consisting of e! Ru. Here, the decimal point key (pause key) 4q is not provided at the intersection of the matrix. That is, one end of the switch 45 of the decimal point key (pause key) 4q is connected to D1.
The other end of this switch 45 is connected to the row line, and the other end of this switch 45 has two backflow prevention dies. K via auto 46 and 47 respectively
. , K8 column line, and each connection point thereof is connected to one end of the switches 3a, 3b constituting the changeover switch 3, and further, the switches 3a, 3
The other end of b is the input end K of the arithmetic control section 36. , 4K8. In addition, the input terminal K of the arithmetic control section 36
,,K. . on the other hand,
D.

The row line is connected to one end of the reed switch 34 via a backflow prevention diode 52, and the other end of this reed switch 34 is connected to the K8i column line. Further, the emitter of a PNP transistor 54 is connected to the D6 row line via a backflow prevention diode 53.
The collector of this transistor 54 is connected to the K8 column line. The base of the transistor 54 is connected to one end of the rewind switch 18c via an NPN transistor 55, and the voltage +V is supplied to the other end of the switch 18c via a power switch 18a. Further, the emitter of a PNP type transistor 57 is connected to the D row line via a backflow prevention diode 56, and the collector of this transistor 57 is connected to the K8 column line. And the transistor 5
7 is connected to one end of the power switch 18a via an NPN transistor 58.
One end of the recording/playback selector switch 30 is connected to the line D8 through a backflow prevention diode 59, and this switch 3? The other end is connected to the K8 column line.
Further, a backflow prevention diode 60 is connected between the D9 row line and the K8 column line. In addition, illustration 6
1 to 64 are diodes for preventing backflow. Next, the key input unit 39 configured as described above will be explained in detail.

That is, this key input section 39 inputs digit signals D, ~
The input terminals K, , K of the arithmetic control section 36 are used as key signals synchronized with D9. , K4, K, a time division method is adopted. Then, when the selector switch 3 is set to the computer mode (CAL) side, the switch 3a is turned on, and the key signal from the key input section 39 is applied to the input terminals K, , K2, and K of the arithmetic control section 36. It will now be output to one of the following, and this will set it to computer mode. For example, when number key M is pressed, its switch 65 is turned on, and digit signal D is output. is on (+VD), the voltage +VD is input to the input terminal K of the arithmetic control unit 36, and the arithmetic control unit 36 operates based on the input signal (key signal) of this input terminal K and the digit signal D6. It will be decoded to the numerical value "'5" and the processing of the numerical value "5" will be executed.Meanwhile, the selector switch 3 is set to tape count mode (TAPE).
When the switch 3b is turned on, the key signal from the key input section 39 is input to the arithmetic control section 36.
,K.

,K. This causes the tape count mode to be set. In the case of this tape count mode b, the input terminal K of the arithmetic control section 36. The signals described below are input to the . That is, when the changeover switch 3 is set to the tape count mode, the digit signal D is output. Since the digit signal 1D9 is input directly, the arithmetic control section 36 determines whether the mode is a computer mode or a tape count mode depending on whether or not this digit signal 1D9 is input. Furthermore, when the recording button 10 is pressed, the recording/playback changeover switch 30 is turned on and the digit signal D8 is input. Next, operate
When the knob 9 is in a position other than the illustrated position A (stopped), the power switch 18a is turned on, and the transistor 58 is turned on.
is turned on, and when the digit signal D7 is ``1'' (+VD), the transistor 57 is turned on, and the D signal is input.Also, when the operation knob 9 is in the direction D (during rewinding) as shown in the figure, , the rewind switch 18c is turned on, thereby turning on the transistor 55, and inputting the digit signal D6.Here, the calculation control section 36 inputs the digit signal D,
This indicates that the recording/reproducing operation is in progress due to the input of the digit signal D. By inputting , it is recognized that the tape count process is a subtraction count process. Furthermore, when the digit signal D is input and the digit signal D6 is not input (the operation knob 9 is in the B position or in the C direction), the arithmetic control unit 36 recognizes that the tape counting process is an addition counting process. It's becoming like that. Note that the digit signal D6 is input to the input terminal K8 through the power switch 18a and the rewind switch 1.
8c are both on, which is the digit signal D as will be described later. This is to avoid delaying the timing of inputting D and D by one cycle or more. Therefore, in this embodiment, when the operation knob 9 is slid in the direction D shown in FIG. 2, the rewind switch 18c is configured to be turned on earlier than or at the same time as the power switch 1'ι8a. There is. Next, the reed switch 34
When turned on, digit signal D. is input, and based on this digit signal D5, the arithmetic control section 36 performs a process of counting the amount of tape travel. Furthermore, when the decimal point key (pause key) 4q is pressed, the switch 45 is turned on, so that the digit signal D1 is sent to the input terminal K.
8, whereby the arithmetic control unit 36 receives the control signal M
The motor 19 is temporarily stopped by outputting S (MS-0N). Note that the decimal point key (pause key) 4q is used to set the selector switch 3 to computer mode (CAL).
) side, the switch 3a is turned on, so that the digit signal D, is input to the input terminal K, and is processed as a decimal point key in the computer mode.

In addition, the input terminals Kl, K of the arithmetic control section 36 of the keyboard 4
The keys connected to 2 are used in both the computer mode and the tape count mode, but memory keys 4a to 4d have different functions depending on the mode, ie, a so-called double function function. That is, when in computer mode, they have a clear memory function, recall memory function, memory minus function, and memory plus function, and when in tape count mode, they have a setting release function (R) and a tape count function, respectively, as described later. It has a value setting function (S), a playback position setting function (>), and a stop position setting function (mouth).

Here, in the tape count mode, memory keys 4a~
4d, ``R'' key 4a) ``S'' key 4b) ``ST'' key 4c and ``STOP'' respectively.
It is called key 4d. The various signals mentioned above are input to the input terminals K, , K of the arithmetic control section 36. , Fu K. , K8 and processed by the arithmetic control unit 36 according to these signals are displayed on the display unit 5 in FIGS. 6 to 8.
This will be explained with reference to the figures. That is, in Figure 6, 4 bits 9
This shows the stored contents of each digit of the display register 66 consisting of digits and the status flag of the input terminal K8 of the calculation control section 36 corresponding to each of the five digits.This display register 66 and the flag are provided in the calculation control section 36. It is being FIG. 7 shows a display conversion unit that converts the storage contents of the display register 66 into segment signals, and the correspondence between the segment θ segment signal and each segment of the display unit 5. It is provided in the control section 36. That is,
4 bits of display register 66 (R8, R., R2, R.
) is decoded by the AND matrix 67,
The decoded contents are converted into seven segment signals Sa, Sb, Sc, Sd, Se, S, , Sg by the 0R matrix 68.
It is now encoded as f. FIG. 8 shows the correspondence between the storage contents of the display register 66 (4-bit input contents of the AND matrix 67) and segment signals. For example, when ``1011'' is input to the AND matrix 67, the segment signals Sa, S, can be output
' is displayed. Also, when the flag [S] is set, segment signal S is input to the AND matrix 67. p is output and a decimal point ``.'' is displayed.Next, a magnetic recording/reproducing apparatus with an electronic computer, which is an embodiment of the present invention and has the above-described configuration, will be described in more detail.

First, in tape count mode, for example, display register 6
If the memory contents of 6 are in m-l■-l, the arithmetic control unit 36
If the contents of the display register 66 are synchronized with the digit signal and inputted as they are to the AND matrix 67, unnecessary "0" will be displayed as is on the display section 5.

Therefore, in this embodiment, the contents of the display register 66 are changed so that unnecessary ``0'' are blanked before entering the display cycle. That is, for example, converting 4 binary bits ``0000'' (O) to ``1111''
'Converting to (15), the th. As shown in FIG. 8, unnecessary ``0'' are blanked out, resulting in display contents as shown in FIG. 9 during the display cycle. (Hereinafter, the above-mentioned processing content will be referred to as zero suppression.) FIG.
Perform zero subresponse sequentially from the 9th digit) and enter the numerical value [1 to 9]
Zero-subless processing is terminated when this is detected.

In other words, the arithmetic control unit 36 specifies the 9th digit in a flow 703 [9→DIG], and in a flow 71 the storage contents of the specified digit in the display register 66 ''R, R. R.

Check whether R and '゛ are '0000'' [R=0]. Here R = 8R8 + 4R4 + 2R2
+R. In the case of '0000', the process proceeds to flow 72, where the stored content of the designated digit of the 4t display register 66 is converted to 'IIW' [15→R], and the process proceeds to flow 73. On the other hand, if it is not "'0000", proceed to flow 74, check whether the stored content of the designated digit of the display register 66 is a numerical value [R≧10], and if it is a numerical value (R<10), perform zero suppression processing. If it is finished and the sign (R≧10), proceed to the above flow 73. In this flow 73, the specified digit is
-1'', the next digit to be checked is newly specified [DIGIT-1→DIGIT] and flow 7
Proceed to step 5. In this flow 75, it is checked whether the digit newly specified in the above flow 73 is the first digit [D
IGIT=1], and if it is the first digit, the zero suppression process is completed, and if it is not the first digit, the process goes to flow 71 again, and the above-described zero suppression process is repeatedly executed. For example, as in the above example, if the storage content of the display register 66 is 1m, first the flows 70, 71, 72, 73
are processed in the order of , and the 5 storage contents of the display register 66 become ■茄■andm, and then in the order of processing of flows 75, 71, 74, and 73, U■■u■ is processed, followed by flows 70, 71, 72,
The processing in the order of 73 is repeated four times, resulting in a result.

Furthermore, flows 75, J71, and 74 are processed in this order, and R
Since =1, the zero suppression process ends and the display cycle begins. In addition, in this embodiment, during the display cycle, the input data of the arithmetic control unit 36 is 1, 2, K.

, K. . Zero suppression cancellation processing is now performed. That is, FIG. 11 shows a flowchart of the zero suppression cancellation process in the arithmetic control section 36.
First of all, flow? 6 specifies the 9th digit [9 -DIGIT], and in flow 77 the stored content of the specified digit of the display register 66 ``'R8R. Check whether R2R,'' is ``1111'' [R=15]. If it is ``1111'', proceed to flow 78, convert the storage contents of the display register 66 to "0000" [o→R], and proceed to flow 79. On the other hand, if it is not ``1111'', proceed to flow 78 directly. 7
Proceed to step 9. In this flow 79, by incrementing the specified digit by ``-1'', the next digit to be checked is newly specified [DI
GIT-1→DIGIT] and proceeds to flow 80. In this flow 80, it is checked whether the digit newly specified in the above flow 79 is ``o'' [DIGIT=
0], and if it is ``0'', the zero suppression canceling process is completed, and if it is not ``0'', the process goes to flow 77 again and the above-described zero suppression process is repeatedly executed. Next, various calculations, counts, and control processes performed by the calculation control section 36 in the tape count mode described above will be explained in detail with reference to the flowcharts shown in FIGS. 12a-j.

That is, when the calculation power switch 2 is turned on, the voltage +VD is supplied to the calculation control section 36, whereby the calculation control section 36 operates. First, in flow 100, the stored contents of all registers, K, input status flag, etc. are cleared, and the process proceeds to flow 101. In this flow 101,
Zero suppression processing is performed according to the flow described above, and the process proceeds to flow 102. In this flow 102, specify the 9th digit [
9→DIGIT] and proceed to flow 103. flow 10
In step 3, by adding ``+1'' to the specified digit, the previous digit is specified [DIGIT+1→DIGIT], and the process proceeds to flow 104. In flow 104, the digit signal corresponding to the newly specified digit is turned off. Next, proceed to flow 105 and set the designated digit to "'-1".
Specify a new digit by [DIGIT-1→DI
G 汀] and proceeds to flow 106. In flow 106, the storage content of the designated digit of the display register 66 is ``R''. R,R. R
,'' and the contents of the flag [S] by the AND matrix 67 and the 0R matrix 68 to generate the segment signal S. ~
Convert to Sg, SdP and output to display unit 5 [SEGME
NT(DIGIT)0N) SEGMENT(DIGIT
+1)0FF] and flow 10? Proceed to. flow 107
Then, the digit signal corresponding to the specified digit (in this case, D9
) is output to the display section 5 [DIGIT-0N], and the display section 5
The above memory contents are displayed in the designated digit. Next flow 108
Go to and check whether the specified digit is ``0'' [D
IGIT=0], and if it is not ``0'', flow 109
Proceed to. In flow 109, the storage content of the display register 66 is ``R''. R,R. Check whether R,'' is ``1111'', that is, R=15 [R=15],
If R=115, proceed to flow 110. flow 110
Then, the key signal from the key input section 39 is stored in the arithmetic control section 36 [K,,K,,K. , K, →K] and flow 111
' (Proceed. In flow 111, turn off the digit signal (D9 in this case) corresponding to the specified digit.
] and proceeds to flow 112. This is to save power by turning off the digit signal D9 since the ninth digit of the display is blanked. On the other hand, if R:15, the process proceeds to flow 113, where the same processing as in flow 110 is performed, and the process proceeds to flow 112 described above. In this flow 112, flow 1
1? Or the key signal input terminal K stored in flow 113.
,K. , K2, K, is checked [K:0] to see if the input contents are K half 0. Here K=8K8+4K,
+2K2+K1, and when the key signal is on, K: 0) and when it is off, K=0. Now, since the designated digit is 9 digits, it is checked whether the selector switch 3 is in the computer mode or tape count mode. Shikaru,
If K=0 (computer mode side), proceed to flow 114, specify a new digit by adding "'-1" to the specified digit [DIGIT-1→DIGIT], and proceed to flow 115.
Proceed to. In flow 115, check whether there is a decimal point in the newly specified digit [DIGIT=PCY], and if there is a decimal point, proceed to flow 116, set the flag [S] [[S] SeO, and there is no decimal point. If so, proceed to flow 117 and reset the flag [S] [[S]Res
et]. Then, returning to the flow 103, if there is no key signal input from the key input unit 39 (K=0), the process starts from the flow 103 described above and repeats the process of returning to the flow 103. like this. As a result of the repetition, if the designated digit becomes ``o'' in flow 105, the process proceeds to reflow 118 by checking [DIGIT=o] in flow 108, and the repetition from the specified digit ``9'' to ``0'' is performed. It was done 4 times (hereafter simply count ``4'')
') [COTJNT=4]
do. If the count is '4', continue with flow 1
Return to step 02, and if the count is not ``4'', proceed to flow 119 and specify a new count number by incrementing the count number by ``+1'' [COUNT+1→COUNT
T] and returns to flow 1025. As a result of these repetitions, the digit signals D to D9 are turned on one after another, and segment signals synchronized with these digit signals are output and displayed on the display section 5. In this case, the storage contents of the display register 66 are cleared in flow 100, and the contents of display register 66 are cleared in flow 1001.
Since zero suppression processing is being performed at 0. ]. Next, when a key operation is performed, the key signal from the key input unit 39 is stored in the arithmetic control unit 36 in the flow 110 or 113, and the process proceeds to flow 112.

In flow 112, as described above, a check is made to see if the internal input power of the key signal K is half 0 [K:0], and if K:0, the process advances to flow 120. In flow 120, it is checked whether the content of the key signal is K≧8 [K≧8], and if K≧8 is not satisfied, the process proceeds to flow 400. flow 4
At 00, it is checked whether the count is "'4" [COUNT=4], and if the count is "4", the process proceeds to flow 401. In flow 401, the digit signal corresponding to the designated digit is turned off and the flow starts. The process advances to 402. In flow 402, zero suppression is canceled and the process proceeds to flow 403. In flow 403, it is determined which digit signal is on and to which key signal input terminal the key signal is input, and this determines which key is being pressed. If so, so-called key selection is performed and the process proceeds to flow 404. In flow 404, calculation processing is executed based on the result of key selection in the above flow 403, the count number is cleared [0→COUNT], and the process returns to the flow 101. The above content will be explained in more detail.For example, suppose that when the number key 〇 is pressed, the switch 65 is turned on, and the specified digit is now 6 digits in flow 105.At this time, the above-mentioned flow 106
, 107, 108, 109, 110, and 111 are performed in this order, and a digit signal D is input to the key signal input terminal K of the calculation control unit 36. ．． is input (K=1). Therefore, the flows 112, 120, 400, 401, 402, 40
The numerical value "゛5'' in the calculation frame mode in the order of 3,404
processing is performed.

When this process is completed, the process returns to flow 101 and a cello suppress process is performed, and while the number 3 key 0 is pressed, the process is performed in the following display cycle. That is, if the designated digit is not 6 digits, the above-mentioned display section 5 will display [0. ] is displayed, the process is repeated in the same display cycle. Also, when the specified digit is 6 digits, check whether the count is ``4'' in the flow 4030 [COUNT=4''
], and if the count is not ``4'' (the count number is set to ``O'' in flow 404), flow 405 is executed.
Proceed to. In flow 405, the count number is cleared [0 → C
[0. ] is displayed, the process is repeated in the same display cycle. Next, when you release the number key ■,
0. ] is displayed in the same display cycle, and in the flow 119, the count number becomes ``1''.
''Increasing gradually. This indicates that the key has been released, and when the count reaches "4" (approximately 20 TrLs in this embodiment), the content of the next key operation is accepted.On the other hand, the changeover switch 3 When set to the tape count mode side, the flow 110 or flow 1
At step 13, the key signal from the key input section 39 (input at the input terminal K8) is stored in the arithmetic control section 36, and the process proceeds to flow 1102.

In flow 112, as described above, it is checked whether the content of the key is K half 0 [K'=-0], and K: 0.
In this case (K=8 in this example when the designated digit is 9 digits), the process proceeds to flow 120. In flow 120, it is checked whether the content of the key signal is K≧8 [K≧8], and if K≧8
In this case, the process advances to flow 121. In this example, since K=8, the process proceeds to flow 121, sets the flag [TAPE], and recognizes that it is the tape count mode. The process then proceeds to flow 122, where the contents of the tape count value storage register (hereinafter simply referred to as TREC) are transferred to the display register 66 (hereinafter simply referred to as DISPREC).
TREG-DISPREG], the computer display is switched to the tape count display as described below, and a tape count mode display cycle is entered. Here is the above TREC
is a 5-digit register (1-digit code + 4-digit setting value) in which the tape count value is stored. In other words, the above flow 1
When the flow advances from 22 to flow 123, zero suppression processing is performed, and the flow advances to flow 124. In flow 124, the content of the pause counter (hereinafter simply referred to as PCOUNT), which will be described later, is set to ``0'' [0→PCOUN,], and then in flow 125, the 9th digit is specified [9→DIGIT], and the flow starts. Proceed to step 126.

In flow 126, the same process as in flow 106 [S
EGMENT(DIGIT)0N) SEGMENT(D
IGIT + 1) 0FF], and then in flow 127, the same process as in flow 107 [DIGIT N]
As a result, d in the display register 66 is displayed on the display section 5.
displayed in the specified digit.

Next, the process proceeds to flow 128, where [DIGIT=O] is checked, and if it is not '0'', the process proceeds to flow 129. In flow 129, [R=15] is checked, and R=151
), flow 130, flow 131 and flow 1-1
If R=15, the process proceeds to flow 133 and then to the flow 132 described above. Here, in flow 130 and flow 133, [K.

,K,,K. , K, →K] processing, and in flow 131, the [DIGITOFF] processing is performed. In the above flow 132, K in the designated digit Z shown in FIG.

It is checked whether the input status flag is set [PRE (DIGIT) Set]. If this status flag is set (in this example, the flag [TAPE] is set when the specified digit is 9 digits as described above), the process advances to flow 134, and the content K of the key signal is determined to be K≧8. In other words, it is checked whether at least the input of the input terminal K8 is on [K≧8]. In this example, since K=8, the process proceeds to flow 135, the next digit is designated [DIGIT-1→DIGIT], and the process proceeds to flow 136. In flow 136, the memory contents of DISPREC are '
Check whether '1010'', that is, R=10 [R=10], and if R=10, set the flag [S] in flow 137 and set R=10.
If not, reset the flag [S] in flow 138.
[[S]Reset] and both proceed to flow 139. Specify the previous digit in flow 139 [DIGIT+1 → DI
GIT] and then flow 140 [DIGITOFF
] The process is performed and the process proceeds to flow 141. In flow 141, the next digit is specified [DIGIT-1→DIGIT] (8 digits in this example), and the process returns to flow 126. flow 126
The processing from flow 132 to flow 132 is performed in the order described above, and when the designated digit is 8 digits, the status flag has been reset, so the flow advances from flow 132 to flow 142. In flow 142, as in flow 134, it is checked whether K≧8 [K≧8], and if K<8 as in this example, the flow advances to flow 135 and the same processing is repeated thereafter. In this way, after the above processing is repeated, flow 14
1 specifies the ``0'' digit and the process proceeds to the flow 128, [DIGIT=0] is checked, and since it is ``O'', the process proceeds to the flow 143.

In flow 143, it is checked whether content ``1010'' indicating stop ``P'' has been set in DISPREC. If it has been reset, the process advances to flow 144. In flow 144, the flag [
Check whether PLAY] is set [[
PLAY]Set], and if it has been reset, the process advances to flow 145. In flow 145 [9-DIGIT]
processing, and then in flow 146 [SEGMENT(
DIGIT)0N) SEGMENT(DIGIT+1)
[DIGITON] processing is performed in flow 147, and the process proceeds to flow 148. In flow 148, [DI
GIT=0] is checked, and if it is not ``0'', the flow advances to flow 149 and a check is performed [R=15]. R=
In case of 15, flow 15? , proceed to flow 151, then proceed to flow 152, and if R=15, proceed to flow 153.
The process then proceeds to flow 152 above. Here, in flows 150 and 153, [K8, K4, K2, Kl→K] processing is performed, and in flow 151, [DIGITOFF] processing is performed. However, in the above flow 152, the content K of the key signal
whether 1≦K<3, that is, the input terminal K, or K. Check if only input is on [1
≦K<3], and if 1≦K<3 is not satisfied, the process proceeds to flow 154. In flow 154, [DIGIT-1→DIGIT
] Process and proceed to flow 155. In flow 155, [R=
10] Check, and if R = 10, proceed to flow 15
The process proceeds to step 6, where the [[S]Set] process is performed, and the process proceeds to flow 157. If R=10, proceed to flow 158 [
[S] Perform ReseO processing and proceed to flow 157 above.
In flow 157, [DIGIT+1→DIGIT] processing is performed, and the flow advances to flows 159 and 160. flow 159,1
60 respectively performs [DIGITOFF] processing and [DIG
IT-1→DIGIT] processing and returns to the flow 146. In this way, after the above-mentioned processing is repeated, the "O" digit is specified in flow 160 and the process proceeds to flow 148, where [DIGIT=0] is checked and it is "0". Proceed to flow 161.

In flow 161, check [COUNT=2]. If the count is ``2'', return to the flow 125, and if the count is not ``2'', proceed to flow 162 [COUNT+1 → COUNT] processing. Then, the process returns to the reflow 125.Then, the process returns to the reflow 125.
34, 142, and the input check routine of the input terminal K8 centered on the flow 152, .
The input check routine of K2 is alternately repeated and displayed on the display section 5. Here, the tape count value displayed on the display unit 5 in the tape count mode is:
As mentioned above, it is displayed as an integer. Therefore, when the calculation power switch 2 is turned on, whether the mode is the computer mode or the tape count mode can be determined by whether or not a decimal point is displayed on the display section 5. Next, the operation knob 9
The contents of various calculations, counts, and control processing of the calculation control section 36 when operated will be explained in detail.

First, when the operation knob 9 is set to the reproduction side (position B in the figure), the power switch 18a is turned on and the digit signal D7 is output from the key input section 39 to the input terminal K8 of the arithmetic control section 36.
The arithmetic control unit 36 stores the input contents of the input terminal K8 in the flow 130 or the flow 133. For example, if the currently designated digit is 7 digits, the process proceeds to the flow 132 and then to the flow 142. In flow 142, [K≧8] is checked, and K
=8, so proceed to flow 163 [DIGIT=5]
Check. Now, in the case of this example in which the designated digit is not 5 digits, the process proceeds to flow 164 to perform a [DIGITOFF] process, then proceeds to flow 165 to perform a [zero suppression release] process, and then proceeds to flow 166. In flow 166, [DIGIT=5] is checked, and if the designated digit is not 5 digits as in this example, the flow advances to flow 167. Flow 167 sets the K8 input status flag of the specified digit [PR
E(DIGIT)Set], that is, in this example where the designated digits are 7 digits, the flag [PLAY] is set to recognize that it is in the playback state. Below, flow 168 will be described later.
- 186 and returns to the flow 123. However,
Until the reel rotation pulse is input, the input check routine of the input terminal K8 centered on the above-described flows 132, 134, and 142 will be displayed. In addition,
The process is repeated in the input check routine of the input terminal K8, and when the designated digit becomes "°0"2, the process proceeds from flow 128 to flow 143, and three [Pset] checks are performed.
In this example, “゜P” has been reset, so flow 14
Proceed to step 4 and check [[PLAY]Set]. In this example, where the flag [PLAY] is set in the flow 167, the flow advances to flow 187 and then flow 188, which will be described later. The flow then returns to flow 125, and the input check routine for input terminal K8 centered around flows 132, 134, and 142 is displayed again. Next, when the operation knob 9 is turned to the fast forward side (direction C in the figure), the fast forward switch 18b is turned on as described above and the motor 19 rotates at high speed, but there is no effect on the input/output of the calculation control section 36. Then, the display continues in the input check routine of the input terminal K8 and waits for the input of the reel rotation pulse.

Further, when the operating knob 9 is returned to the stop side (position A in the figure), the power switch 18a and the fast-forward switch 18b are turned off, the motor 19 is stopped, and the arithmetic control unit 36 performs the following processing. That is, when the designated digit is the 7th digit, the input value of the input terminal K8 becomes 0, and the flow 132
By checking [PRE (DIGIT) Set], the process proceeds to reflow 134. This is determined by the flag [P
This is because [LAY] is set. flow 134
Then check [K≧8] and proceed to flow 1 because K=0.
Proceed to 89. In flow 189, [DIGIT=5] is checked, and in this example, the specified digit is not 5 digits, flow 19
Go to 0. In flow 190, [DIGIT=1] is checked, and in this example, the specified digit is not a single digit, flow 191 is checked.
”. In flow 191, [DIGITOFF] processing is performed, and the flow proceeds to flow 192. In flow 192, [PR
E(DIGIT)Reset] processing, that is, in this example, reset the flag [PLAY] and proceed to flow 19.
Proceed to step 3. In flow 193, [zero suppression release] processing is performed, and the process proceeds to flows 194 to 200, which will be described later, and then returns to flow 123. Then, the tape count mode display cycle is entered, and as described above, the input check routine for the input terminal K8 and the input check routine for the input terminals Kl and K2 are alternately repeated to continue displaying the tape count value. Next, when the operating knob 9 is turned to the rewind side (direction D in the figure), the rewind switch 18c is turned on, and then the power switch 18a is turned on, and the motor 19 starts rotating at high speed. Here, when the rewind switch 18c and the power switch 18a are turned on at the timing when the digit signal D7 is output from the arithmetic control section 36, the processing is performed in the following order. That is, flows 132, 142, 1
63, 164, 165, 166, and 167 are sequentially processed, and a flag [PLAY] is set in flow 167. In flow 168, [DIGIT=8] is checked, and if the designated digit is not 8 digits, the flow advances to flow 169.
In flow 169, it is checked whether content "110" indicating an error "E" is set in DlSPREC [[E]Set], and if it is reset, the flow advances to flow 170. Flow 170 [DIGIT
=7] Check, and if the designated digit is 7 digits, proceed to flow 171. In flow 171, [6→DIGIT
] processing, and then proceeds to flows 172, 173, and 174, and processes [DIGlTON], [K8, K4,
K2, Kl→K] and [DIGITOFF] are performed, and the process advances to flow 175. Flow 175 is the specified 6 digits (
[K≧8] is checked in [Flow 171], and if K≧8 (K=8 in this example), flow 201 is checked.
Proceed to. Flow 201 [PRE (DIGIT) Se
t] processing, that is, in this example, the flag [REV]
, recognize that it is in the rewind state, and proceed to flow 1.
Proceed to step 76. In flow 176, it is checked whether the flag [SET] is set, that is, whether it is recognized that the tape counter value has been set.
[SET] Set] and is not recognized (reset)
If so, proceed to flow 177. In flow 177, it is checked whether the flag [N] is set, that is, whether the operation of the number keys (9) to (9) on the keyboard 4 is recognized.
However, if it is not recognized (reset), proceed to flow 17.
Proceed to step 8. In flow 178, it is checked whether the flag [ST] is set, that is, whether it is recognized that the tape start position has been set.
ST]Set], and if it is not recognized (reset), the process advances to flow 179.

In flow 179, it is checked whether the flag [SUB] is set, that is, whether the tape running amount counting process is set as subtraction mode.
) Set], and if it is not set, flow 18
Go to 0. In flow 180, check whether the flag [RE■] is set [[RE■]Set]
However, if it is set, the process advances to flow 202. In flow 202, it is checked whether a flag [NOC] to be described later is set [[NOC]Set], and
If not set, proceed to flow 203; if set, proceed to flow 203a. flow 2
In step 03, set the flag [NOC] and proceed to flow 203a.
Then, the flag [NOC] is reset and the process proceeds to flow 204 in either case. In flow 204, the flag [S[J
B] and proceed to flow 205. In flow 205, it is checked [[CUE]Set] whether the flag [CUE] is set, that is, whether the fast forward state is recognized, and if it is not set (
reset), the process advances to flow 206. flow 206
Then check [[ST]Set], and if it has been reset, proceed to flow 186 [[ST]Rese
t] process and return to flow 123. Here, the flag [SUB] is provided for the purpose of reliably counting the generated pulses even if the reel continues to rotate due to inertia when the operating knob 9 is returned to the stop side. That is, the flag [SUB] is set when the operation knob 9 is set to the rewind side, and reset when the operation knob 9 is set to the playback side.
Depending on the state of this flag [SUB], the arithmetic control unit 36 determines whether the tape running amount counting process is in the subtraction mode or addition mode, as described above. That is, the set state is, for example, a subtraction mode, and the reset state is, for example, an addition mode. Next, if the rewind switch 18c and the power switch 18a are turned on at the timing when the digit signal D6 is being output from the arithmetic control section 36, the digit signal D7 described above is output from flow 132 to flow 170. Processing is performed using the same procedure as when the timing is set.

In flow 170, [DIGIT=7] is checked,
If the specified digit is not 7 digits as in this example, Frono 2
Proceed to 07. Flow 207 checks [DIGIT=6], and if the specified digit is 6 digits, flow 201
The processing from Flow 123 to Flow 123 is performed in the same procedure as described above. Tata 7, flow 167 flag [RE ■]
(In the above example, 5 sets the flag [PLAY], and in flow 201, the flag [PLAY] is set (in the above example, the flag [RE■] is set). Also, as in the above example, the flag [NOC] is set. and flag [SUB] are also set, and in either case, the reel rotation pulse is θ
The tape count value is displayed in the input check routine at the input end K8 until it is input. In addition, power switch 1
As mentioned above, when the switch 8a is turned on, the transistors 55 and 58 are turned on at the same time (during a rewind operation, the rewind switch 18c is configured to turn on earlier than or at the same time as the power switch 18a). However, this is because if the timing is off, the arithmetic control section 36 will be unable to correctly determine whether it is playback or rewinding, which will impede the control function of the arithmetic control section 36. When the operation knob 9 is turned to the stop side again, the power switch 18a and the rewind switch 18c are turned off, and when the designated digit is the 7th or 6th digit, the input at the input terminal K8 becomes "°0" and the reflow 132 , 134 and then sequentially processed to flows 189 to 200.

Here, in flow 194, [DIGIT=9] is checked, and if the designated digit is not 9 digits, the flow advances to flow 195. In flow 195, [DIGIT=8] is checked, and if the designated digit is not 8 digits, the flow advances to flow 196.
Flow 196 is flag [PLAY] and flag [R
E■] and reset [[PLAY]Resetl[RE
V]Reset] and proceed to flow 1, which will be described later, as described above.
97-200 The program then proceeds to flow 123 to enter a tape count mode display cycle. Thus, the input check routine for the input terminal K8 and the input check routine for the input terminals Kl and K2 are alternately repeated to display the tape count value. Next, a method for counting and processing the amount of tape travel will be explained.

That is, as described above, the reed switch 34 is repeatedly turned on and off by the rotation of the take-up reel shaft 24a, and when the reed switch 34 is turned on, the key input section 39 outputs the digit signal D5 (hereinafter simply referred to as a reel rotation pulse) to the input terminal K8. ) is. “It will be output and counting processing will be performed.First, when the specified digit is 5 digits, flow 1
Proceed to 32, 142, 163. Flow 163 [D
IGIT=5], thereby checking whether the digit signal D, is input to the input terminal K8. If the designated digit is 5 digits, the process advances to flow 209.
Flow 209 checks whether the flag [NOC] is set as described below.
], and if it is not set (reset), the process advances to flow 210. In flow 210, as described later, it is checked whether the flag [WON] is set.
[WON]Set], and if it is not set (reset), the process advances to flow 211. In flow 211, the flag [WON] is set [[WON]Set], and the process proceeds to flow 212. In flow 212, [PRE(DIGIT
) Set] processing, that is, sets the flag [REEL], recognizes that the reed switch 34 is turned on, and proceeds to flow 213. In flow 213, [4→DIGIT]
After processing, the flow advances to flow 139, and the input check routine for the input terminal K8 is entered again to continue displaying. in this way,
When the reed switch 34 is turned on for the first time, Fragno [WO
The display does not change depending on the setting of [N] and the flag [REEL].

Next, when the reed switch 34 is turned off, when the designated digit is 5 digits, the input voltage of the input terminal K8 becomes 0, and the flow 1
Proceed to 32, 134, 189.

In flow 189, check [DIGIT=5],
When the designated digit is 5 digits, the process advances to flow 214. flow 214
Now, perform the [PRE (DIGIT) ReseO process, that is, reset the flag [REEL], and then set the reed switch 34.
It is recognized that the switch is turned off, and the process proceeds to flow 215. In flow 215, [[NOC]Set] is checked, and if it is not set (reset), the flow advances to flow 216. In flow 216, the pause count value to be described later is set to “0”.
Set (a)→PCOUNT] and proceed to flow 217. In flow 217, a [[S]Reset] process is performed, and the process proceeds to flow 213, which then proceeds to an input check routine for the input terminal K8. Next, when the reed switch 34 is turned on again, when the designated digit is 5 digits, the input value of the input terminal K8 becomes 1, that is, K=8, so the flows 132, 142, 163
, 209, 210, 164, 165, 166.

In flow 166, check [DIGIT=5],
If the designated digit is 5 digits, the process advances to flow 218. flow 2
At 18, set the flag [REEL].
Set] and proceeds to flow 219. In flow 219, reset the flag [WON] [[WON]Reset]
Then, proceed to flow 220. In flow 220, the flag [S
Check whether UB] is set [[SU
B'3set], and if set, flow 2
Proceed to 21, and if it has been reset, proceed to flow 222
Proceed to. In the flow 221 above, DISPRO. By subtracting the contents of ゜“-1゛, the tape running amount is subtracted and counted [DISPREC-1 → DISPREC], and the process proceeds to flow 223. On the other hand, in flow 222, DISPR
By adding 1 to the contents of EO, the tape running amount is added and counted [DlSPRIllC+1→D
ISPREC] and proceeds to the above flow 223. flow 2
23, check whether the flag [STOP] is set as described below [[STOP]Set]
However, if it has been reset, the process advances to flow 224.
In flow 224, a [[CUE]Set] check is performed, and if it has been reset, the process returns to flow 123 and proceeds to the input check routine for input terminal K8. 1. Then, when the reed switch 34 is turned off again, the same processing as when the reed switch 34 was turned off the previous time is performed.

That is, in the flow 214, the flag [REEL] is reset and the input check routine for the input terminal K8 is entered, and the display continues. In this way, the reed switch 34 is turned on and off twice (the take-up reel stand 24 is
) and the tape running amount (tape count value) is ゜゜+1゛ or “゜-1” depending on the state of the flag [SUB].
It will be counted.

FIG. 13 is a timing chart showing the calculation process described above. That is, FIG. 13a shows the rotation of the take-up reel stand 24, and FIG. 13b shows the on-off state of the reed switch 34 as the take-up reel stand 24 rotates.
Further, FIG. 13c shows an input signal at the input terminal K8 synchronized with the digit signal D5, which is output from the key input section 39 as the reed switch 34 is turned on and off.
FIGS. 13D and 13e show the state of the flag [WON] corresponding to the input signal of the input terminal K8 during playback (when the operating knob 9 is in position B or direction C in the figure) and the tape count corresponding to this flag [WON]. It shows the value. Furthermore, FIGS. 13F and 13g show the flag [WON] state and the tape count value during rewinding (when the operation knob 9 is in the direction of D in the figure). By the way, in this embodiment, as shown in FIG. 13, when the rotational speed of the take-up reel stand 24 is "N", the tape count value is corrected to become "N" both during playback and during rewinding. The amount of tape travel is being counted.

The method of correction will be described in detail below with reference to the timing chart of the counting process shown in FIG. That is, the figure a shows the rotational speed of the take-up reel stand 24, and the figure b shows the on-off state of the reed switch 34. Also,
Figure c shows the flag [SUB] and the flag [SUB] in the playback state.
WON], flag NOC], and tape count status. Now, when playback stop-playback stop is frequently repeated, the operation knob 9 may not be locked at the stop position and may be pushed to the rewind side. For example, a case will be described in which the above operation is performed at position 1 shown in FIG. 14c during reproduction. That is, the flag [S
UB] and flag [NOC] are reset, flag [W
ON] is set, the tape count value is “
When rewinding from playback when ゜N゛ (position 1 as shown),
When the designated digit is 6 digits, the process proceeds to flows 132 and 142, then flows 164 to 170, and then flows 207 and 208.
, 201, 176-180, 202-206 are processed in this order.

At this time, the flag [RE■] is set in flow 167, and the flow 20
1 flag [PLAY], flow 203 flag [NO
C] and the flag [SUB] are set in flow 204, respectively. Next, when the reed switch 34 is turned on, when the designated digit is 5 digits, flows 132, 142, 163
, 209, 212, and 213 are processed in this order. Here, the flag [REEL] is only set in flow 212, and no counting process is performed even though the flag [WON] is set. Therefore, the tape count value remains “N”. Next, the reed switch 3
4 is off, flow 132,1 when the specified digit is 5 digits
Processing is performed in the order of 34, 189, and 214. flow 2
14, perform the [PRE7 (DIGIT) Reset] process, reset the flag [REEL], and proceed to flow 21.
Proceed to step 5. In flow 215, a [[NOC]Set] check is performed, and if the flag [NOC] is set, the process advances to flow 225. In flow 225, [[WON
．． l) Set] check is performed, and if the flag [WON] is set, the process advances to flow 226. In flow 226, reset the flag [WON].
Reset] and proceed to flow 216, and the following flow 21
Processing is performed in the order of 6, 217, and 213. The flags [S group D1 flag [WON], flag [NOC] and tape count status in this rewinding operation of θ are shown in Fig. 14d.
Shown below. Now, when the operation knob 9 is set to the stop side at the J position shown in Fig. 14 d, the designated digit becomes 7 digits (or 6 digits).
, flows 132, 134 and flows 189 to 1
Processing is performed in the order of 96.

In flow 196, the flag [PLAY] and the flag [
REV] reset [PLAY'1reset1[RE
V] ResetO, and proceed to flows 197 to 200, which will be described later, in order, and proceed to the tape count mode display cycle. Then, when the operation knob 9 is set to the playback side, when the designated digit is 7 digits, flows 132, 142, and flows 163 to 17
Processing is performed in the order of 9. At this time, in flow 167, the flag CPLAY] is set. Above flow 17
In 9, check [[SUB]Set] and set the flag [S
UB] is set, the process advances to flow 227. In flow 227, it is checked whether the flag [NOC] is set [[NOc'1Set], and if it is set, the flow advances to flow 227. flow 22
7, reset the flag [NOC] [[NOC]Re
set] and proceeds to flow 180. In flow 180 [
[REV]Set] check and flag [RE■]
If not set, the process advances to flow 181. In flow 181, the flag [SUB] is reset, and the following processes are performed in the order of flows 182 to 186.

Next, when the reed switch 34 is turned on in the above state, when the designated digit is 5 digits, the flow 132, 142, 163,
Processing is performed in the order of 209, 21 [0, 211, 212].

At this time, the flag [WON] is set in flow 211, and the flow 2
The flag [REEL] is set at 12. and,
As mentioned above, when the reed switch 34 is turned on next time, the flag [WON] is reset and the tap count value is set to ゜“+.
Do 1. Flag in the above playback operation [SUB]
, flag [WON], flag [NOC], and tape count status are shown in FIG. 14e. Next, when the operating knob 9 is set to the rewind side at the K position shown in FIG. 14e, the flag [PLAY] and the flag [RE]
■], flag [NOC] and flag [SUB] are set.

Then, when the reed switch 34 is turned off, the same process as when the reed switch 34 is turned off for the first time in the rewinding operation is performed, and the flag [REEL] and the flag [WON] are reset.

Next, when the reed switch 34 is turned on, the same processing as when the reed switch 34 is turned on for the first time in the rewinding operation is performed, and the flag [REEL] is set. Now, when the reed switch 34 is turned off again,
When the specified digit is 5 digits, flows 132, 134, 189,
214. In flow 214, [PRE(
DIGIT) Reset] process and set the flag [REE
L] and proceeds to flow 215.

In flow 215, [[NOc, lSet] is checked, and if the flag [NOC] is not set, the process proceeds to flow 2-25. In flow 225, [[WON']
Set] is checked, and if the flag [WON] is reset, the flow advances to flow 229. flow 229
Now, reset the flow [NOC] [[NOC] Res
et] Processing is then performed in the order of flows 216 and 217. Thereafter, the setting and resetting of the flag [WON] is repeated by repeating the ON operation of the reed switch 34, and the condition of the flag [WON] (when reset)
As a result, subtraction counting processing is executed. Figure 14 f shows the flag [SUB], flag [WON], flag [NOC] and tape count status in the above-mentioned rewinding operation.
Shown below. Next, the illustrated L position in FIG. 14 f (the flag [SUB] is set, the flag [REEL] [WON]
When the rewind operation is stopped and the playback operation is performed again, if the specified digit is 7 digits, flows 132 and 14 will be displayed.
2 Further, processing is performed in the order of flows 163 to 179.
At this time, in flow 167, the flag [PLAY] is set. In the above flow 179, a [[SUB]Set] check is performed, and if the flag [SlJB] is set, the flow advances to flow 227. In flow 227, [[N
OC]Set] is set, and if the flag [NOC] is reset, the process advances to flow 228a. In flow 228a, the flag [NOC] is set [[NOC]S
et] and proceeds to flow 180. In flow 180, [[
If the flag [REV] is not set, the flow advances to flow 181 and the flag [SUB] is reset. Next, reed switch 3
When 4 is turned on, the specified digit is 5 digits and the flow is 132, 1.
Processing is performed in the order of 42, 163, 209, and 212.
In this flow 212, a flag [REEL] is set. Next, when the reed switch 34 is turned off, the designated digit is 5.
digit, flow 132, 134, 189, 214, 2
Processing is performed in the order of 15, 225, 229, 216, 217, and 213, and in flow 214, the flag [REEL],
In flow 229, the flag [NOC] is reset. Thereafter, the setting and resetting of the flag [WON] is repeated by repeating the ON operation of the reed switch 34, and the addition counting process is executed according to the condition of the flag [WON] (when it is reset). Flag [SUB], flag [WON], flag [NOC] in the above playback operation.
] and the tape count state are shown in FIG. 14g. As explained above, in this embodiment, the status flag (flag [S1-IB]) is used to determine whether subtraction counting or addition counting.
) is provided with a flag [NOC] whose state changes when it changes from set to reset or from reset to set (from set to reset or from reset to set), and while this flag [N(1)C] is set, flag〔
WON] is reset, the counting process is not performed to correct the discrepancy in the tape count value during playback and rewinding in the conventional counting process described above. That is, when the rotational speed of the take-up reel stand 24 is "N", the tape count value is "N" during both playback and rewinding.
It is controlled so that it becomes N. In addition, the above flag [N
OC] is reset by turning off the reed switch 34 while the flag [WON] is being reset. Next, a method of setting tape count values and the like using key operations will be explained.

In other words, in tape count mode, the number keys (9
) ~ (9),゜“R゛key 4a1゜S゛key 4bC'S
The tape count value, playback start position, stop position, etc. can be set using the T key 4C1 and the STOP key 4d. For example, now the operating knob 9 is on the stop side, and the input end K centered on the flow 152
When a key is pressed at the timing of the input check routine for Kl and K2, the input contents of the input terminals Kl and K2 are stored in the arithmetic control section 36 in flow 150 or flow 153, and the flow advances to flow 152. In flow 152, [1≦K<3] is checked, and if 1≦K<3, the process proceeds to flow 230. In flow 230, it is checked whether the display cycle in the input check routine for input terminals Kl and K2 from designated digit "9゛゛ to ゜゜0゛" has been repeated twice (COU
NT=2], and if the count is ゜゜2゛, flow 23
Go to 1.

In flow 231, [DIGlTOFF] processing is performed, and then in flow 233, [zero suppression release] is performed, and the process proceeds to flow 233. In flow 233, it is checked [AFTset] whether the flag [AFT] is set, that is, whether it is recognized that the operation knob 9 has just been set to the stop side. If the flag [AFT] is not set, the process advances to flow 234. flow 23
4 checks whether the "R" key 4a has been pressed [゜゛R゛ key], and if it has not been pressed, flow 235
Proceed to. In flow 235, it is checked [Eset] whether an error is displayed, and if no error is displayed, the process advances to flow 236. In flow 236, it is determined which key has been pressed based on the input contents of the input terminals K1 and K2 and the contents of the specified digit (digit signal). If the count is not 2, proceed to flow 406 and clear the count (A) → COUNT
] The program then proceeds to flow 154, where the input check routine for the input terminals Kl and K2 and the input check routine for the input terminal K8 are alternately repeated. And when the key is released,
1≦K<3, so the flow advances from flow 152 to flow 154, and the input check routine for the input terminals Kl and K2 and the input check routine for the input terminal K8 are alternately repeated. In the flow 162, the count increases by 1, and when the count reaches 2, the next key operation is accepted.
First, setting of the tape count value will be explained.

For example, assume that recording is stopped once the tape count value is ゛゛50゛, and the calculation power switch 2 is turned off. In this state, if you want to record again instead of Memo 5, for example, by turning on the calculation power switch 2 and performing the following operations, you can set the tape count value ゛゜50゛ and record. . i.e. numeric key (5)
When you press , the [key sorting] process is performed in flow 236 as described above, and the process advances to flow 237. In flow 237, it is determined whether the flag [SET] is set, that is, whether the tape count value has been set. It is checked [[SET] Set] whether or not it is recognized, and if it is not recognized (reset), the process advances to flow 238. In flow 238, it is checked whether the flag [N] is set, that is, the number key is pressed. It is checked [[N')Set] whether or not the flag [N] has been set, but at this point, the flag [N] has not been set yet, so in this case, the flow advances to flow 239.In flow 239, the flag [N] is not set.
0→DISPROc] processing, that is, DISPR6. Clear the contents of and proceed to flow 240. Flow 240 is the [N-DlSPRIlElC] process, that is, the numerical value “
5゛ is DIS circle E. The process then proceeds to flow 241. Flow 241 sets the flag [N] [[N,)Set
] to proceed to the display cycle, and the number ゜"5" is displayed.Next, press the number key (9) to proceed to the above flow 236,
Processing is performed in the order of 237 and 238. In flow 238, a [[N]Set] check is performed, and since the flag [N] is set at this time, the process skips flow 239 and proceeds to flow 240. Next, the process advances to flow 241, where the numerical value ゜"50゛ is stored in DISPREC, and the numerical value ゜゜50゛ is displayed in the display cycle. Next, "
When the ゜S゛゜ key 4b is pressed, the flow advances from the flow 236 described above to the flow 242. In flow 242, [[N. llres
et] process, reset the flag [N], and proceed to flow 243. In flow 243, [[CuE′)Set
] is checked, and if the flag [CUE] is not set, the process advances to flow 244. In flow 244, it is checked [[STOP]Set] whether the flag [STOP] is set, that is, whether it is recognized that the stop position has been set, and if it is not recognized (reset), the flow returns to Proceed to 245. In flow 245, the [[SET, lset] process is performed to set the flag [SET]. That is, the calculation control unit 36 recognizes that the tape count value has been set. In addition,
When the above display cycle is the second round, in flow 237 [[S
ET') Set] is checked and the flag [SET]
is set, the process advances to flow 237a. In this flow 237a, the tape count setting value is stored in TREC.
DISPREC→TROC]. By the way, if you notice that you have made a mistake in setting the tape count value after pressing the "S" key 4b, you can stop at the correct tape count setting value by repeating the above operation.

In other words, perform the correct number key operation again and select “゜S.
Just press key 4b. This is the flag [N] set (flow 241) by the first numeric key operation.
This is because it is reset (flow 242) by the next operation of the "S" key 4b. That is, when the numeric keys are operated again, the processing is performed in the order of flows 238, 239, and 240, in order to clear the erroneous numeric value and enter the correct numeric value. Also, if you accidentally press the "S" key 4b when there is no need to set the tape count value, the important tape count value will be lost if you continue the operation. By pressing the key 4a, the flag [SET] can be reset to protect the tape count value. That is, in flow 234, the [゜゜R゛ key] is checked, and if the "R" key 4a is pressed, the process advances to flow 246. In flow 246, the [Erest] process is performed, and then flow 2
Proceed to step 47. In flow 247, [[SET]Set] is checked, and if the flag [SET] is set, the process proceeds to flow 248.In flow 248, the flag [N] and flag [SET] are reset, and flow 1 is executed.
Proceed to step 22. However, in flow 122, [TROc-+
By performing the DISPREO process, the tape count value at the time the 4°S' key 4b was pressed will be displayed. If you realize that you have made a mistake in setting the tape count value after pressing a number key, press the clear key 4e, then operate the correct number key again, and select “S”.
By pressing the key 4b, the tape count setting value can be corrected. In other words, clear key 4e
When the button is pressed, the process advances to flow 407, where a [[N')Set] check is performed, and if the flag [N] is set, the process advances to flow 408. In flow 408, (a)→DISP
ROO] process and clear the missed values. As a result, if you perform the correct number key operation again, Flow 2
This is because the processing is performed in the order of 38 and 240, and the correct numbers are set. Next, setting of the stop position will be explained.

That is, setting of the stop position during playback, fast forwarding, and rewinding is performed by pressing the ST0P key 4d.
For example, if you press any number key to set the number as described above and then press the "STOP" key 4d, the flow 236
The process then proceeds to flow 249. At Flo-ichi 249, [[SET]
)Set] check is performed, and if the flag [SET] is not set, the process proceeds to flow 250, and if it is set, the process proceeds to flow 249a to check the flag [[SETll)R].
eset], [WON]Reset, SDISPREC
→TREC] After performing the process, the flow advances to flow 250. In this flow 250, the flag [N] and the flag [S
ET] is reset and the process proceeds to flow 251. flow 2
In 51, set the flag [ST] [[ST'1Set
] and proceeds to flow 252. In flow 252, check whether ST key 4c is pressed [ST key].
When ゜゜ST0P゛ key 4d is pressed, flow 25
Proceed to step 3.

In flow 253, [[CUE]Set] is checked, and if the flag [CUE] is reset, the flow advances to flow 254. In flow 254, the value of DISPREC and the value of TREC are compared [DISPREO<TR6
O] is made and the value of DISPREC is smaller than the value of TREC, the flow advances to flow 255 and the flag [BA
CK] and [[BACK]Set], recognizing that this is the setting of the stop position when rewinding, and proceeding to flow 256.
Proceed to. On the other hand, if the value of DISPREO is greater than or equal to the value of TROC, the process advances to flow 257, and the flag [
BACK] is reset [[BACK')Reset] and the process proceeds to flow 258. In flow 258, [DISPR
EO=TREC] is checked, and if the value of DISP8OO is the same as the value of T8OC, the process advances to flow 259. In flow 259, the flag [STO] is set [[S
TO) Set] and recognizes that the start position and stop position are equal, and proceeds to the flow 256 described above. On the other hand, DIS
The value of PREC is TRO. If it is not equal to the value of ST
O]Reset], it is recognized that the start position and the stop position are different (start position minus stop position), and the process proceeds to the above flow 256. In flow 256, the storage contents indicating the stop position of DISPREC are transferred to STOPlEO, which will be described later [DISPREO→STOPRO]. ] and DISPRO
Store "゜1110゛" in the seventh digit of O, and set the flag [STOP] to recognize that the stop position has been set. Then, the process advances to flow 123, where the display cycle of the tape count mode is entered, and the set value of the stop position and a symbol indicating the stop position, such as a hook "゜f", are displayed.
．． ．． E. is 5 digits (1 digit code +
This is a register with a 4-digit set value. Next, setting of the playback start position will be explained. That is, the start position during playback is set by pressing the S key 4c. For example, as mentioned above, if you press any number key to set the number and then press the "ST" key 4c, the flow 236
, 249, 250, and 251 are performed in this order, and in the above flow 251, the flag [ST] is set, and the process proceeds to flow 25.
Proceed to step 2. In flow 252, the [゛゜ST゛ key] is checked, and if the "゜ST" key 4c is pressed, the process advances to flow 261. In flow 261, [DISPREO] is checked.
<TRO6> Check and DISPRO. The value of T
If it is smaller than the ROC value, proceed to flow 262 and D
Memorize ゜110]'゛ in the 9th digit of ISPR5C [ESe
t] to indicate an error, and also performs [MSON] processing to prevent the motor 19 from rotating even if the operation knob 9 is operated without noticing the error. in this case,
The reason for determining this as an error is that when the operating knob 9 is set to the playback side, it means that playback from the start position is impossible, and suggests that rewinding is necessary. On the other hand, DISP
If the value of REC is TR. ．． If it is smaller than the value of C, the process goes to flow 263 and checks [DISPROc=TROO]. If the value of DlSPREC is equal to the value of TREC, the process proceeds to flow 264 and performs a [[STOP')Set] check. If the flag [STOP] is set, the process proceeds to flow 265, sets the flag [STO], and proceeds to flow 266. Also, the flag [STOP]
If the flag [STO] has been reset, Kawako proceeds to flow 265a, resets the flag [STO], and proceeds to flow 266 described above. Flow 266 sets the flag [NCUE].
[NCUE]Set] and recognizes that the tape count value stored in TREC and the playback start position are equal to 5 during playback, and proceeds to flow 267. Further, in the flow 263 above, the value of DISPREC is Tl. .
If it is larger, the process advances to flow 266a and the flag [N
CUE] and proceed to the flow 267 described above. In flow 267, a [[REC')Set] check θ is performed, and if the flag [REC] is not set, the flow advances to flow 268. In flow 268, the memory contents indicating the start position of DISPR6C are transferred to STARTREO [DISPR8. →STARTREO] and DISPR
Store "101F" in the 8th digit of EC, set the flag [CUE]SeO, and proceed to flow 269. Here, STARTREc is the 5 digit ( This is a register with a 1-digit code + 4-digit setting value).

In flow 269, [[STOP] Set] is checked, and if the flow [STOP] has been reset, the process advances to flow 132, enters the tape count mode display cycle, and shows the set value of the playback start position and the start position. For example, a key mark "" is displayed. Note that if the stop position during playback has already been set, the flag [STOP] is set (Flow 25
6) and therefore in flow 269 [[
STOP]Set] check result flow 270 is proceeded to.

In flow 270, [STOPREC
] is checked, and if the value of the playback start position is larger than the value of the stop position, playback is impossible, and the process proceeds to flow 262, resulting in an error [ESet]. On the other hand, if the value of the stop position is greater than or equal to the value of the reproduction start position, the process advances to flow 271. In flow 271, [STO
P8.

. =STARTRTEC] is checked, and if the value of the stop position and the value of the playback start position are equal, proceed to flow 272 and set the flag [STO]; if they are not equal, proceed to flow 273 and set the flag [STO]. Reset and proceed to flow 123 in either case. Also,
The stop position and the playback start position may be set in any order.

In other words, the playback start position is set and then the stop position is set. Then, flows 236, 249, 250, 25
1, 252, 253, and in flow 253, [[
CuE,lSet] is checked and the flag [CUE
] is set (flow 268), the process advances to flow 274.

In flow 274, j[DISPROO<STARTRE
c] Check. This is because the fact that the playback start position has been set indicates that the value of DISPREC is greater than or equal to the value of TREC, so it is only necessary to compare the value of DISPREC with STARTRO6. .

That is, if the value of DISPREC is smaller than the value of STARTREO, playback becomes impossible and flow 262
Then, an error [Eset] occurs. On the other hand, DISPR
If the value of EC is greater than or equal to the value of STARTROO, proceed to flow 275 and set [DISPREO=STA
RTREc] Check. DISPRE. If the value of l, and the value of STARTREO are equal, flow 25
Step 9 sets the flag [STO], and if they are not equal, goes to flow 276, resets the flag [STO], and goes to flow 256 in either case. In the flow 256, as described above, [DISPRO. -STOPRE
0], [''Set], and [[STOP]Set] are performed, and the process proceeds to the display cycle. As explained above, in this embodiment, when the ST key 4c or the ST key 4d is pressed, the flag [ST] is set, and preparations are made to display the keys and keys, respectively. However, they are STARTREC, .STOPREC.
and is displayed in the tape count mode display cycle.

At this time, it goes without saying that a set value indicating the playback start position or stop position is also displayed corresponding to the above display contents. Next, the set values of the playback start position and stop position can be canceled and the error can be canceled using the "R" key 4a.

First, if you press the "゜R゛" key 4a when the playback start position and stop position have been set, the above flow 234
, 246, and 247 are performed in this order, and the process advances to flow 277. In flow 277, [[CuE, lSet] is checked, and if the flag [CUE] is set (flow 268), the flow advances to flow 278. flow 27
In 8, [MFOFFl"Resetl[NCUE][C
UE] [STO]ResetsTOPROO→STAR
TREc] processing and proceeds to flow 279. flow 27
In 9, check [[ST')Set] and set the flag [
ST] is set (flow 251), the process advances to flow 280. In flow 280, [0→STOPR
Ea,”Resetl[BACK][STOP]Res
et] processing and proceeds to flow 281. In flow 281, [[NCUE][CUE][STO,lresetC
resetSTOPREC→STARTRO. , MF′
0FF] processing and proceeds to flow 248. flow 24
8, [[N][SET][ST')ResetPre
set,. MSOFF] processing is performed, and the flow 12 is performed.
Proceed to step 2 to enter the display cycle. In other words, press the "゜R" key 4a, ゜"0000" will be stored in the 8th and 7th digits of DISPROO [4th and 1st] will be reset.
, STOPREC and STARTREO are cleared, and the flag [CUE], flag [STOP],
Flag [BACK], Flag [STO], Flag [NC
UE] and flag [ST] are reset and the set values are canceled. Therefore, the memory contents of TREC are
It will be transferred to OO (flow 122) and the tape count value will be displayed. Next, in the case of an error, press the "'R" key 4a, and in the flow 251, [Ereset
] Processing is performed, and the 9th digit of DlSPREC is set to ゜“0000.”
is stored, and the error display and set value are cleared. Here, only the "゜R゛" key 4a can be accepted as a key operation in the case of an error, and the error display will not be erased in the case of other key operations.
Check the “゜R゛ key” and if it is not the “゜R” key, proceed to flow 235 and check [Eset], and if an error is displayed, flow 12
This is to proceed to step 3 and continue displaying the error. Next, the operation of the operating knob 9 after setting the tape count value, playback start position, and stop position will be described.

For example, if you move the operation knob 9 to perform a playback (recording) operation or a rewind operation after setting the tape count value, the [[SET'3set] check is performed in the flow 176,
Flag [SET] is set (Flow 245)
If so, proceed to flow 282. Flow 282 is [[S
ET] [WON] Reset] process and set the flag [S
ET] and the flag [WON] and proceed to flow 177. In flow 177, a [[N]Set] check is performed, and if the flag [N] is set (flow 241), the flow advances to flow 283. In flow 283, the flag [N] is reset [[N]Reset], and the flow advances to flow 2384. In flow 284, [TREEG
-+DISPREC] processing, and the tape count value stored in TREC is transferred to DISPREO. When the reel rotation pulse is input, the flow 22 is applied to the tape count setting value (DISPREc).
1 or flow 222, counting processing is executed. Next, a case in which a playback operation is performed after setting a playback start position will be described in detail.

That is, when the reproduction operation is performed, the processing proceeds in the order of flows 182 and 183. In this flow 183, [[CuE′]
If the flag [CUE] is set (flow 268), the flow advances to flow 285. In flow 285, a [[NCUE]Set] check is performed, and if the flag [NCUE] is not set, the flow advances to flow 286. Flow 286 [MFO
N] Perform the process, rotate the motor 19 at high speed, and proceed to flow 18.
Proceed to step 6. In flow 186, [[ST]Reset] processing is performed to reset the flag [ST]. Then, when the reel rotation pulse is input, addition and counting processing is performed, and the processing proceeds in the order of flows 223 and 224. This flow 22
4, a [[CUE]Set] check is performed, and if the flag [CUE] is set (flow 268), the process advances to flow 287.

Flow 284 [STARTREc=DISPREC
] is checked, and as long as the tape count value does not match the set value of the playback start position, the addition counting process continues.
A new tape count value will be displayed. However,
If the tape count value matches the set value of the playback start position, the flow advances to flow 288 and a [[CUE] Set] check is performed, and if the flag [CUE] is set (flow 268), the flow advances to flow 289. flow 289
Then check [[STO]Set] and set the flag [S
If TO] has not been set, proceed to flow 290 [ResetMFOFFl[CUE][STO']
Reset] processing is performed, the motor 19 rotates at a constant speed, the start position setting display is cleared, and the flag [CUE
] is reset and the process proceeds to flows 291 and 123. In flow 291, [STOPROc-+STARTRcc] processing is performed, and the memory contents of STOPROO are changed to STARTR.
The data is transferred to EO, and playback is started from the set value of the playback start position. Also, when a playback operation is performed when the set value of the playback start position is equal to the tape count value (flag [NCUE] set), first flow 183,
The process proceeds in the order of 285.

In flow 285, a [[NCUE')Set] check is performed, and if the flag [NCUE] is set, the process advances to flow 29iθ2.

In flow 292, [[CUE][NCUE, lrese
tl "Reset" processing is performed and the flag [C[JE]
Then, the flag [NCUE] is reset, the start position setting display "1" disappears, and the process advances to flow 184. Next, processes are performed in the order of flows 185, 186, and 123, and in flow 185, the memory contents of STOPRIEO are changed to STARTR.
The data is transferred to Ec, and the playback is started from the set value of the playback start position.

On the other hand, if a rewind operation is performed, the process proceeds to flow 205 [[C
uE′)Set] is checked and the flag [CUE]
is set (flow 268), flow 26
Proceed to step 2.

Flow 262 is [MSON. ．． ESet] processing and proceeds to flow 293. In flow 293, [[PLAY
[Set] is checked, and if the flag [PLAY] is set (flow 167), the process advances to flow 294. Flow 294 [MSON, . pset] processing and proceeds to flow 295. In flow 295 (a)
→STOPRCC] and proceeds to flow 296.
In flow 296, [”Resetl[BACK][ST
OP') Reset] process, and the following flow 29 is performed.
Processing is performed in the order of 0, 291, and 123. As a result, the set value is canceled, the motor 19 stops, and the 9th digit of DISPREC "゜110F゛(゜"E゛)" is changed to ゜" in the 6th digit.
1010゛ (“゜P゛)” is stored and the display cycle begins.Then, the character “” indicating an error is displayed in the 9th digit of the display section 5.
For example, the character ゜゜P.゛ is displayed in the 6th digit. In this case, the error message indicates that it is impossible to play from the start position even if you continue rewinding. In addition, the above character ゛゜P.゛ is displayed despite the operation of the operation knob 9 (in this example, rewind operation).
This is to notify that the motor 19 is stopped.
Also, this "P." display is set by "P" (R=10). When flow 137 or flow 156
This is done by setting the flag [S] at . In addition, ゜゛P. If the display is lit, the error can be canceled by turning the operating knob 9 to the stop side. That is, when the operation knob 9 is returned to the stop side, the [Ereset. sPres
etc. , MSOFF] processing is performed, and ゜“E゛” and ゜゜P゛ are reset and become MSOFF.

Next, a case q in which the operating knob 9 is operated after setting the stop position will be described.

That is, when the operation knob 9 is moved to perform a playback (recording) operation, a rewind operation, etc., in the flow 284, [TREC
-+DISPREG] processing. Then, the tape count value (contents of TREC) is transferred to DISPREC, and in flow 185 the stored contents of STOPREC are transferred to STOPREC.
Transfer to TARTREc [STOPREC-+START
REO] and then flag [ST] in flow 186.
is reset [[ST]Reset]. When a reel rotation pulse is input here, a counting process is performed in flow 221 or 222, and the process proceeds to flow 223. In flow 223, check [[STOP]Set],
Flag [STOP] is set (Flow 256
), the process advances to flow 287. In flow 287, [S
TART8llllC=DISPREO] check and STARTR6. If the value of DISPREC, that is, the stop position setting value (according to flow 291) matches the value of DISPREC, that is, the tape count value, the process advances to flow 288. ) In flow 288, [[CuE, lSet] is checked, and if the flag [CUE] is not set, the flow advances to flow 297. In flow 297, [[ST')Res
et] processing, and the following flows 294, 295, 2 are performed.
Processing is performed in the order of 96, 290, 291, and 123 pieces. This causes the motor 19 to stop and the ゛゜P.゛ is displayed,
The set value will be canceled and the blasphemy display will disappear. Further, when the operating knob 9 is operated when the set value of the stop position is equal to the tape count value (the flag [STO] is set), the flow 184 or the flow 184a is performed.
STO]Set] is checked, and if the flag [STO] is set, the process advances to flow 298.

In flow 298, [[ST]Reset] processing is performed,
The following flows 294, 295, 296, 290, 29
Processing is performed in the order of 1,123. As a result, the motor 19 does not rotate (remains stopped), and ゛P?゛ is displayed. Furthermore, if a rewinding operation is performed when the set value of the playback start position is greater than the tape count value (the flag [CUE] is set by flow 268), the process proceeds to flow 205, and the following flows 262, 293, 294, 295, etc. 296
, 290, 291, and 123 are processed in this order. As a result, ゛゜゜゜E゛ and ゜“P.゛” are displayed in the 9th and 6th digits of the display section 5, respectively, and the motor 19 remains stopped. If you perform a playback operation when the value is smaller than the value, the above flow 1
Proceeding to 82, a [[BACK]Set] check is performed,
The flag [BACK] is set (Flo-1 255
), the process proceeds to flow 262. Below, flow 293,
Processing is performed in the order of 294, 295, 296, 290, 291, 123, and "゜E゛" and "P. is displayed and the motor 19 remains stopped.

Furthermore, if the rewinding operation is performed when the set value of the stop position is greater than the tape count value (the flag [BACK] is reset by flow 257), the flow 205, 206
, 184a, and the process advances to flow 409.
In flow 409, a [[BACK]Set] check is performed, and since the flag [BACK] has been reset, the process advances to flow 262. Below flow 293, 294, 295
, 296, 290, 123 in this order, and as above, "E" and "P. The motor 19 for which "" is displayed remains stopped. Next, a case will be described in which the operating knob 9 is operated without noticing an error during setting by key operation.

First, an [ESet] check is performed in flow 169, and in the case of an error, the flow advances to flow 299. flow 299
Then, [TREC-)DISPREC] processing is performed, and the following flows 294, 295, 296, 290, 291 are performed.
, 123 are processed in this order. As a result, the tape count value is transferred to DISPREC, the motor 19 remains stopped, and the "E" and "゜P" values are transferred to DISPREC.゛ is displayed. Then, when the operation knob 9 is returned to the stop side, the flow 1
At step 98, "E゛゜゛P" is reset to MF'0FF. In this embodiment, "゛P. To cancel the error when ゛ is displayed, turn the operation knob 9 to the stop side, and to cancel the error when ゜“P.゛ is not displayed, press the ゛R゛ key 4a as described above. Next, canceling the setting of the playback start position after operating the operation knob 9 will be explained.

In this embodiment, as described above, playback is fast-forwarded to the playback start position, and then playback is started from the playback start position. However, content that you want to open may appear during fast forward playback, and in this case, by turning the operation knob 9 to the stop side and pressing the ゜"R" key 4a,
The playback start position can be canceled without canceling the stop position setting value. That is,
When ゜゜R'5 key 4a is pressed, [
[Ereset] process and proceeds to flow 247. In flow 247, [[SET] Set] is checked, and if the flag [SET] is not set, flow 2
Proceed to 77. In flow 277, [[CUE]Set] is checked and the flag [CUE] is set (
Flow 268) If so, proceed to Flow 278. flow 2
In 78, [MFOFFl "Resetl[NCUE]"
CUE] [STO') ResetlSTOPR8C-+
START8EC] processing is performed, and the process proceeds to flow 279.
In flow 279, check [[ST]Set],
Flag [ST] has been reset (flow 186)
If Yang meets, the process proceeds to flow 248. Flow 248 [N]
[SET] [ST] Reset, . Preset,. M
SOFF] processing and proceeds to flow 122. As a result, STOPR. ．． The memory contents of O are transferred to STARTREc, and the set value of the playback start position is canceled, but
The set value of the stop position is stored and protected in STARTREO. Also, the "" display will disappear. Furthermore, when the operation knob 9 is set to the playback side, in flow 287, [STA
RTRT:c=DISPROc] is checked, and playback is performed until the stop position is reached. Next, protection of the stop position set value after operating the operating knob 9 will be explained.

For example, there are times when you may miss something during the playback operation and want to listen to it again. In such a case, an error occurs every time the rewind operation is performed, and it is very inconvenient to set the stop position again. In this embodiment, when the operation knob 9 is operated after setting by key operation, the tape count value is compared with the set value to detect an error, but after the operation knob 9 is operated, the set value is protected. It is becoming more and more common. That is, if the playback operation is performed after setting the stop position and the operation knob 9 is set to the stop side once before reaching the stop position, in the flow 199, the CDISP
REC → 5TREC] and tape count value (
The contents of DISPRlEO) are transferred to TREC. Then, when you turn the operation knob 9 to the rewind side and try to rewind to the part you missed, in flow 206, [[ST]
Set] is checked, and if the flag [ST] is reset to O (flow 186), the flow advances to flow 123 and a display cycle is entered, and the set value is protected. At this time, the flag [NOC] and flag [NOC] that control the counting process are
SUB] are set in flow 203 and flow 204, respectively. Note that if the flag [ST] is set during the check in flow 206, the flow advances to flow 262 and an error occurs. In this way, the flag [ST
] is used to determine whether it is necessary to detect an error. However, as described above, when operating the operation knob 9 during playback operation after setting the stop position, flow 1
Since the flag [ST] is always reset at 86,
There will be no error. Next, the flag [AFT] that is set when the operating knob 9 is set to the stop side will be explained.

Generally, the take-up reel stand 24 rotates slightly due to inertia even after the operation knob 9 is set to the stop side, so the reed switch 3
If you switch to the stop side just before 4 turns on, flow 19
TRE memorized at 9 [DISPREG-+TRE6]
Contents of C and tape count value (contents of DISPREC)
will no longer match. This is because even after the arithmetic control unit 36 recognizes the stoppage (flow 200), the take-up reel stand 24 rotates due to inertia, the reel rotation pulse is input, and the counting process continues according to the conditions of the flag [SUB]. It is. Therefore, when a key operation is performed, the above flow 2
33, it is checked whether the flag CAF'T] is set [[layer T, lSet], and the flag [AFT
] is set (flow 200), the process advances to flow 300 and the next process is performed. That is, flow 30
0, [[AFT]ReSet, . DISPREG→T
REC] process, reset the flag [AFT], and set the correct tape count value [DISPREC. "Contents" are transferred to TREllC and stored therein.Next, error display during recording operation will be explained.

The recording operation in this embodiment can be performed by pressing the recording button 10 and turning the operating knob 9 to the playback side, and the control over the stop position is the same as for the playback operation. However, if the control over the playback start position is the same as in the playback operation, the motor 19 rotates at high speed until the playback start position (flow 286), making it impossible to record normally. Therefore, in this embodiment, if the recording button 10 is operated while the playback start position is set, it is treated as an error and the already recorded content is protected. That is, when the recording button 10 is pressed, the input at the input terminal K8 becomes ゜“1゛” (K=
8), and the flows 132, 142, 163, 164,
Processing is performed in the order of 165, 166, and 167. In this flow 167, [PREcDIGIT')Set] processing is performed, a flag [REC] is set, and the flow advances to flow 168. In flow 168, [DIGIT=8] is checked, and if the designated digit is 8 digits, the process advances to flow 301. In flow 301, [[CUE]Set] is checked, and if the ) flag [CUE] is not set (playback start position is not set), the process proceeds to flow 123,
Recording is performed as described above. On the other hand, flag [C
UE] is set (playback start position is set), the above flow 301 to flow 2
Proceed to 62, and the following flows 293, 295, 296, 2
Processing is performed in the order of 90, 291, and 123. This allows “
Even if E゛ is displayed and the operation knob 9 is set to the playback side,
Processing is performed in the same way as when the knob is operated without noticing the error during setting due to the key operation described above. That is, the motor 19 does not rotate and remains stopped. Next, an error when setting a playback start position after a recording operation will be explained.

Up to now, the case has been described in which the recording button 10 is operated after setting by key operations, but it is also possible to operate the recording button 10 and then performing settings by key operations. However, since setting the playback start position causes the above-mentioned problem, an error occurs only in this case. That is, when the playback start position is set after pressing the record button 10, in the flow 267, [[REC, lset]
A check is performed, and if the flag [REC] is set (flow 167), the process advances to flow 262 and an error occurs. Further, when the recording button 10 is pressed while fast-forwarding to the playback start position is being performed by the playback operation (the flag [CUE] is set), the following processing occurs.
That is, in the flow 301, the [[CUE]Set] check is performed, and if the flag [CUE] is set (flow 268), the flows 262, 293, 29
Processing is performed in the order of 4, 295, 296, 290, 291, and 123. Therefore, the motor 19 stops rotating,
゜“E-“゜P.゛ is displayed.

Next, a temporary stop operation using the temporary stop (decimal point) key 4q will be explained.

That is, the sawing operation can be stopped by pressing the pause key 4q during the reproduction operation. For example, if you press the pause key 4q now, when the designated digit is 1 digit, the input at the input terminal K8 becomes ``1'' (K = 8), and the flows 132, 142, 1
63, 164, 165, 166, 167, 168, 16
Processing is performed in the order of 9, 170, and 207. Above flow 16
7, performs the [PRE (DIGIT) Set] process and sets the flag [POINT]. Also, flow 207
[DIGIT=6] is checked, and in this example where the designated digit is one digit, the process advances to flow 302. flow 3
In step 02, [[PLAY]Set] is checked, and if the flag [PLAY] is set (flow 167), the process advances to flow 303.

In flow 303, [Pset] is checked, and if ゜゜P゛ has been reset, the process advances to flow 304. In flow 304, [PseζMSON] processing is performed, and the flow advances to flow 123. As a result, "゜P." is displayed and the rotation of the motor 19 is stopped.Next, when the pause key 4q is released, when the designated digit is 1 digit, the input at the input terminal K8 becomes "0" (K=0 ), and the flows 132, 134, 189, 1
Processing is performed in the order of 90. This flow 190 is [DIG
IT=1] is checked, and in this example where the designated digit is one digit, the process proceeds to flow 305. In flow 305, [
PRE(DIGIT)Reset] process, reset the flag [POINT], and proceed to flow 139; however, P. continues to be displayed.

Then, when the pause key 4q is pressed again, the reflow 132, 142, 163, 164, 165, 166, which becomes the input pattern "1" (K=8) at the input terminal K8 when the designated digit is 1 digit.
167, 168, 169, 170, 207, 302, 3
Processing is performed in the order of 03. The above flow 167 is [PRE
(DIGIT)Set] and flag [POIN
T] is set again.

Also, in flow 303, [Pset] is checked and “
If P' is set (flow 304), the process advances to flow 306. In the flow 306, [Preset, .
MSOFF] processing and proceeds to flow 123. As a result, ゜゛P. The display disappears, the motor 19 starts rotating, and reproduction is performed. As explained above, pause (
By repeatedly pressing the decimal point) key 4q, it is possible to perform pause, play, pause, play, and so on. Next, the tape end auto-stop function will be explained.

That is, in this embodiment, when the tape is rewound to the beginning or played back to the end, it is detected that there is no rotation of the take-up reel stand 24, and the rotation of the motor 19 is stopped. For example, when rewinding or playing is performed by operating the operation knob 9, counting processing is performed in flow 221 or flow 222, and the process proceeds to flow 123 where input is performed. The display cycle by the input check routine at end K8 is repeatedly executed from the 9th digit to the 1st digit, and the contents of DISPR5 are displayed on the display unit 5. When the designated digit becomes ゜“0゛”, the flow starts. Proceed to step 143 and check [Pset], and if “P” has been reset, proceed to flow 144.
Proceed to. In flow 144, [[PLAY')Set] is checked, and if flow [PLAY] is set, the flow advances to flow 187. In flow 187, [PC
OUNT+1→PCOUNT] processing, PCOUNT
The contents of T are increased by ``゜+1゛'' and the process proceeds to flow 188. In flow 188, [PO. UNT = 200] is checked, and unless the contents of PCOUN, become ``200゛゛, the process proceeds to flow 125 and the input terminal K8 is changed again. A display cycle is performed using an input check routine. Then, if the rotation of the take-up reel stand 24 is stopped and no new signal is input to the input terminal K8, the content of PcOUNτ is increased by +1 in the flow 187. That is, the Linol rotation pulse is input. If not, the contents of PCOUNT will continue to increase. When the contents of PO.UNT reach "200", the flow advances from flow 188 to flow 307, and a [[REV]Set] check is performed. Flag [R
If EV] has been set, in the case of evening or rewinding, the process advances to flow 308, sets a flag [FO] to be described later [[FO] Set], and advances to flow 309. On the other hand, if the flag [REV] has been reset, that is, in the case of reproduction, the flow 308 is skipped and the process proceeds to flow 309 θ. In flow 309, [MSON. ．． ps
et] process, the motor 19 stops, and ゜“P.゛” is displayed.In this embodiment, the input terminal K
8 input check routine and P.

It takes about 6rrI. to process the routine that increases OUNT by +1. Since it takes a time of 1.s, the content of PCOUNTτ becomes ``200'', which means that it takes about 1. It means that the hoe has passed. Here, the time required for the take-up reel stand 24 to rotate once is normally 1'' second, and as long as the take-up reel stand 24 continues to rotate, the reel rotation pulse is 0. The data is input to the calculation control unit 36 at intervals of the hoe. Therefore, the above PCO
The fact that the content of UNl becomes "゜200゛" clearly indicates that the tape is at the end.
Since the take-up reel stand 24 does not rotate even when a rewind operation is performed to attach the magnetic tape, the motor 19 stops in the same way as in the case described above, and it is possible to notify that the magnetic tape is not attached. . On the other hand, when the take-up reel stand 24 is rotating (not at the end of the tape), when the reed switch 34 is turned off, in the flow 216 [0→
POOUN, ] processing and clear the contents of PCOUNT.

Therefore, if the reel rotation pulses are normally input at intervals of 0.8 seconds, the contents of PCOUN will never reach the state of "200" and the motor 19 will not stop.In this embodiment, When operating the operation knob 9, the power switch 1
At the timing when 8a is turned on, a signal is inputted from the key input section 39 to the arithmetic control section 36 to make it recognize the operation content of the operating knob 9. This is the power switch 18
This is to prevent a phenomenon in which the timing of turning on a is delayed, the start of rotation of the motor 19 is delayed, and the above-mentioned function is activated, causing the motor 19 to stop. Ru. Next, the role of the flag [FO] during auto end stop will be explained.

That is, as mentioned above, when the tape rewind operation is performed to the beginning of the tape, the tape end stop function is activated and the flag [FO] is set. When you return to the stop side, DISP
The contents of REC are cleared and the tape count value automatically becomes "0".This is because there is no tape count 4 position that serves as a reference for recording and playback, and the control described so far. In this embodiment, the tape count value at the beginning of the tape is set to ``0'', and after rewinding to the beginning of the tape, the next operation of the operation knob 9 is always enabled from the tape count value 440''. That is, when the operation knob 9 is set to the stop side, the flow 132,1
34,189,190,191,192,193,19
Processing is performed in the order of 4, 195, and 196, and the process advances to flow 197. In flow 197, [[FO]Set] is checked, and the flag [FO] is set (flow 30).
8) If so, proceed to flow 310. Flow 310 [
[FO] [WON] Reset] processing and flag [
FO] and flag [WON] and proceed to flow 3.
Proceed to step 11. In flow 311, (a)→DISPRO.
] processing, thereby clearing the contents of DISPREC. In addition, when playing until the end of the tape,
Even if you rewind to the beginning of the tape, ゜゜P.゛Displayed i
Since the flag [FO] is not set when there is no change (before the contents of PcOυNT reach ゜6200゛),
Even when the operation knob 9 is turned to the stop side, the tape count value does not become 0. Next, mode switching by the changeover switch 3 will be explained.

That is, when the selector switch 3 is set to the computer mode side (switch 3a on, switch 3b off), the input at the input terminal K8 becomes "0" when the designated digit is 9 digits, and the flow 132
,134,189,190,191,192,193,
The processing is performed in the order of 194, and the process advances to flow 312. In flow 312, [Ereset] processing is performed, and in flow 313
Proceed to. In flow 313, a [[N,)Set] check is performed, and if the flag [N] is not set, the flow advances to flow 314. In flow 314, [[SET, ls
et] is checked, and if the flag [SET] is not set, the process advances to flow 315. In flow 315, [[ST]Set] is checked and the flag [ST]
If not set, the process advances to flow 316. In flow 316, [DISPREC-+TREC] processing is performed, whereby the tape count value (contents of DISPR6) is transferred to TREO, and flow 31, which will be described later, is performed.
7, the process advances to flow 101 and the computer mode is entered. Then, when the changeover switch 3 is set to the tape count mode side again (switch 3a off, switch 3b on), the digit signal D9 is output to the input terminal K8, and the flows 112, 1
Processing is performed in the order of steps 20 and 121, the flag [TAPE] is set, and the flow advances to flow 122. In flow 122, [T
REC-+DISPREC] processing, thereby changing the tape count value (contents of TR[E:C) to DISPRE.
The tape count operation can be performed by continuing to transfer the data to C. The mode switching described above will be explained in more detail.

That is, in this embodiment, for example, stored content to be calculated is played back during playback, and the selector switch 3 is set to the computer mode side (switch 3a on, switch 3
By setting the magnetic recording/reproducing device to the computer mode by turning the magnetic recording/reproducing device (b off) to the computer mode, the magnetic recording/reproducing device remains locked while calculation processing is being performed, no matter what knob operation is performed. During playback, press the pause key 4q to pause the playback, and then set the changeover switch 3 to the computer mode side, and as described above, flows 132, 134, 1
89, 190, 191, 192, 193, 194, 31
2,313,314,315,316,317,101
Processing is performed in this order, and as a result, the computer mode is entered and MS-ON (flow 304) continues. At this time, even if the operation knob 9 is operated, the switch 3b is off, so no key signal is output from the key input section 39 to the input end K8. Therefore, the arithmetic control section 36 does not recognize the above-mentioned operation details, and on the other hand, the MS-ON continues and the motor 19 does not rotate, so that the magnetic recording/reproducing device is in a locked state. Next, while leaving the operation knob 9 on the playback side, return the selector switch 3 to the tape count mode side, and the flow 11
Processing is performed in the order of 2, 120, 121, 122, 123, the tape count mode is entered, and the tape count value (
The contents of TRIE1C) are transferred to DISPROc (flow 122) and displayed in the input check routine of the input terminal K8.

Further, the locked state continues until the operation knob 9 is turned to the stop side. This is because the flag [PLAY] is cleared in the [TREcPRE (DlGIT), clear all except MS] process in flow 317, so if the specified digit is other than 7, it is processed in the input check routine of the input terminal K8. Not only is it repeated, but also when the specified digit is 7 digits, the flow 132, 134, 135
This is because the processing is performed in this order, and as a result, the processing is repeated in the input check routine of the input terminal K8. Also, if the changeover switch 3 is set to the computer mode side during setting by key operations (numeric keys, ゜"S゛key 4b..'゜ST'゛key 4C1゜゜゜ST0P゛key 4d), flow 3
13 to 315, check [[N]Set], [[SET]Set] and [[ST
[Set] check is performed, and flow 316 is skipped and the process proceeds to flow 317. Therefore, CDISPREC→T
ROC] processing is not performed, so the contents of TREC, that is, the tape count value, are protected. In the embodiment described above, playback (recording), fast forwarding, rewinding, etc. are performed by operating the operating knob, but the operation is not limited to the operating knob, but may be performed using operating means such as an operating button.

In addition, although we have explained the case where it is implemented in a magnetic recording and reproducing device with a computer, a computer is not necessarily required.
The present invention can be similarly applied to a magnetic recording/reproducing device called a simple micro cassette tape recorder or a normal cassette tape recorder. In addition, the present invention is not limited to the embodiments described above, and it goes without saying that various modifications can be made without departing from the gist of the invention.

As detailed above, according to the present invention, the magnitude of the count value of the counting means for counting the pulses generated as the tape runs is compared with the set value of the playback start position set by key operations on the keyboard. If the determination means determines that the set value of the reproduction start position is smaller than the count value at the time when the reproduction start position is set, an error state is established based on this determination result, and, for example, By displaying an error message and preventing the tape from running, it is very convenient because it prevents erroneous operations when pressing keys on the keyboard.Also, even if you perform a playback operation without noticing the error display, the tape will not run. Therefore, there is no need to notice the mistake 5 only after fast-forwarding to the end of the tape and retry the correct operation, thereby providing a magnetic recording and reproducing device with significantly improved operability.

[Brief explanation of drawings]

Figures 1 to 14 show one embodiment of the present invention. Figure 1 is a perspective view showing the overall appearance, Figure 2 is a detailed view of the internal mechanism, and Figures 3A and 3B are pulse FIG. 4 is a detailed diagram of the generating means, FIG. 4 is a circuit configuration diagram of the main part, FIG. 5 is a circuit diagram of the key input section, FIG. 6 is a diagram showing the contents of the display register in tape count mode, and FIG. A schematic configuration diagram of the display converter, FIG. 8 is a diagram showing the input/output contents of the display converter, FIG. 9 is a diagram showing an example of a zero suppress display state in tape count mode, and FIGS. 10 and 11 are tape count Zero suppression flowchart in count mode,
12a-j are flowcharts for explaining the control operation, FIG. 13 is a timing chart for explaining the counting process, and FIG. 14 is a timing chart for explaining the counting process in detail. 1... Housing, 4... Keyboard, 4c
...44ST9j+7, 4d. ．． ．． 44ST0P99
tree. ,5. ．． ．． ．． ．． ．． Display section, 9...operation knob, 10...recording button, 19...motor,
24...Take-up reel stand, 25...Rewind reel stand, 26...Magnetic head, 33゜゜゛゜magnet, 34...Reed switch, 36...
... Arithmetic control section, 37 ... Drive control section, 3
9...Key input section, 261, 263...
・Comparison flow of tape count value and playback start position setting value, 262... Flow of stopping motor in case of error.

Claims (1)

[Claims] 1. A magnetic recording and reproducing device that records or reproduces information on a running magnetic tape, comprising a counting means for counting the running distance of the tape, a setting means for setting at least a playback start position of the tape, and this setting. a determining means for comparing and determining the magnitude of the set value by the means and the counted value by the counting means, and when the determining means determines that the set value by the setting means is smaller than the counted value by the counting means; A magnetic recording/reproducing apparatus characterized by comprising a control means for displaying an error as an error state and prohibiting the running of the tape.