JPS589972B2 - information processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an information processing device for inserting a decimal point code signal into numerical information.

When outputting numerical information using a display, printer, etc., it is common practice to output decimal point information along with the numerical information. This can be achieved by inserting a decimal point code signal into

The present invention relates to an information processing apparatus that inserts a decimal point code signal at the decimal point position of numerical information.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an overall block diagram of an information processing device, and here, information obtained by encoding multi-digit character or symbol information is shown. The shift register 11 and shift register 12 that store data are registers 111, 112,
113, 114 and registers 121, 122, 123,
This register consists of four registers of 124 and has a parallel configuration of 4 bits per digit.

In this embodiment, both registers 11 and 12 have a total of 13 registers.
It consists of digits, of which the two least significant digits constitute the number indicating the decimal point position, the third digit from the least significant indicates the negative sign, and the 10 digits from the fourth to the most significant digit express the numerical value. It is structured as follows.

However, since the most significant digit is not involved in actual display or printing, only a nine-digit numerical value can actually be held during display.

A full adder/subtractor 13 is arranged on the input side of this register 11, and is used to add and subtract the inputs to its two inputs "X" and "Y".

Normally, a control command "R11→X" is input to the "X" side, the output of the register 11 is input to the X side through the gate 14, and the contents of the register 11 are circulated.

Furthermore, when an "add" or "subtract" command is applied to Y inputs, the output of the register 12 is input through the gate 15 by the command "R12→Y", and addition and subtraction are performed in the full adder 13. , the result is held in "register 11".

In addition to “addition” and “subtraction” instructions, there are instructions for “Y” inputs! In this case, the code specified by the command is input to the Y side.

In this case, "X" inputs are prohibited, addition and subtraction are not performed, and the code itself is held in the register 11.

Note that the gate 16 is opened by the instruction "R12→R12", and the contents of the register 12 are held in a circular manner.

A gate 17 provided in a part of the signal line from a part of the circuit loop of the register 11 to the control command formation circuit 22 performs non-zero determination in response to the "non-zero determination R11" command, and the result is used as described above. It is applied to the circuit 22.

The register 18 operates as an information storage device for specifying the target digit for determining whether display or printing is necessary in the information accumulated in the register 11, and has the same length as the registers 11 and 12. It has a 13-bit time.

In this register, the gate 19 is opened by the instruction "R18→R18", and the contents of the register 18 are held in a circular manner. However, when the instruction "set R18" is applied, the contents are applied regardless of the previous contents. Only the bit of the digit corresponding to the time specified by the instruction is newly set.

Also, by using the commands “left shift R18” and “right shift R18”, the bit contents at the specified time are changed by 1 bit (1 digit) to the left and right.
Shifting is the same as shifting left and right in the register 11 by the commands "left shift R11" and "right shift R11".

By combining several instructions, this register 18 can itself be used as a power rank, or the decimal point and other information can be output for display. The contents of the register are used as they are to determine the designated execution times of various other instructions.

For example, by using an instruction such as ``6 set R18'' or ``left shift R18'', only the necessary bits of the register 18 are set to ``1'', and the specified execution time of the next instruction such as ``R12→Y'' is set. If this register 18 is controlled so as to specify the determination, "R12→Y" is executed only for the digit corresponding to the bit set to "fl".

In this embodiment, this register 18 is used to specify the information held in the register 11,
Specifically, the transfer of information is performed for the digits of the register 11 corresponding to the digits set to "1" in the register 18.

In this embodiment, the times for specifying the execution of various instructions can be selected not only by selecting the bits of the register 18 but also by selecting the times shown in FIG.

That is, PZ: Total digit time from the least significant digit (lower decimal point "P") to the most significant numerical digit (Z") LZ: From the least significant digit ("L" of the fourth digit from the lowest) of Z: (
“Z”) Time PE: Time S to 2 decimal places ((t P 91 and “E”)
Z: Negative sign Negative sign 3rd digit from the bottom el S”) to (”Z
The actual operation of the information processing device as shown in FIG.
Flowchart shown in Figure 3, Regisc I shown in Figure 3
This will be explained below using the information in L1B and the signal waveform shown in FIG.

In FIG. 2, it is assumed that, before control is started, numerical data into which a decimal point code signal is to be inserted is held in registers L to Z of the register 12, and decimal point information is held in EP of the register 12. .

Here, as a concrete numerical example, as shown in Figure 3A, the number indicating the decimal point position is "2" and the integer part is '0000050.
479'', that is, the number ``50479''.

Each bit register 121.1 of register 12 at this time
The output waveform of 22.123.12' is as shown in FIG. 4A.

Next, explanation will be added sequentially according to the control flow in FIG.

In FIG. 2a, all digits of the above-mentioned data held in the register 12 are transferred to the register 11 over time PZ by instruction 4>"R12-+R11(PZ)".

At this time, the information in register 12 is held as is, so the contents of registers 11 and 12 are the same as A as shown in FIG. 3B.

Next, by the instruction "Set R18 (LZ)" shown in FIG. 2, only the timing "LZ" bits corresponding to numerical digits excluding the decimal point digit and the negative sign digit are set in the timing register 18.

That is, as shown in Figure 3, each bit of the upper 10 digits of the register 18 is set, and as a result, among all the digits of the register 18, the digits having numerical contents become the digit period for insertion of the decimal point code signal. .

Next, in the step shown in FIG. 2 c-i, a decimal point code is inserted into a predetermined digit, and this step will be explained in detail.

First, as shown in FIG. 2e, it is determined whether the decimal point digit (time PE) of the register 11 is zero.

In the example, as shown in the third diagram, the numerical value indicating the decimal point position is "2" and not zero, so the determination result is YE.
S and jumps to C in Figure 2.

Here, a value indicating the decimal point position of register 11 (time P
"1" is subtracted from E), and as a result, the "PE" digit of the register 11 becomes "1" as shown in FIG. 3E.

Next, as shown in FIG. 2d, the contents of the digit corresponding to time LZ in the register 18 are shifted to the left by 1 bit (1 digit) by the instruction "left shift R18 (LZ)", and as a result, the contents of the digit corresponding to the time LZ in the register 18 are shifted to the left by 1 bit (1 digit), and as a result, the contents of the digit corresponding to the time LZ in the register 18 are shifted to the left by 1 bit (1 digit). Thus, only the upper nine digits of time "LZ" excluding "L" are "1".

In this way, the steps c, d, and e in Figure 2 are
This process is repeated until the decimal point content (time PE) of the register 11 becomes zero.

In the embodiment, "PE" in the register 11 was initially the numerical value "2", so by repeating steps c, d, and e in FIG. 2 for two cycles, "PE" in the register 11 becomes zero as shown in FIG. 3G. becomes.

At this time, the contents of the register 18 are the upper 8 as shown in FIG.
The digit (8 bits) is "1".

In this way, when the decimal point content (time PE) of the register 11 becomes zero, the determination result in FIG. 2E becomes No, and the process proceeds to the next step f.

FIG. 2 f-i shows the step of forming a decimal point code in the digits in the register 11 corresponding to the decimal mark.

First, in the step shown in FIG. 2f, the steps shown in FIG.
= “1” in the register 18 formed in step 6
A decimal point code (here, 6A of the hexadecimal code (1010)) is formed in the digit (in this case, the upper 8 digits) in the register 11 corresponding to the bit having ``character generation'' command.

As a result, the inside of the register 11 becomes as shown in FIG. 3, but at this time, the waveforms of the registers 111, 112, 113, and 114 become as shown in FIG.

Next, proceed to the step shown in FIG.
11(SZ)'' shifts the contents of the numerical value part in the register 11 to the right by one digit in the lower order direction.

As a result, the lowest digit of the numerical value in register 11 is the third
As shown in Figure J, the S'' digit enters the negative sign digit.

Next, proceed to the step shown in the second diagram.

12→R11 (R18)'', the contents of the upper eight digits corresponding to the bit contents of the register 18 are transferred from the register 12 to the register 11.

As a result, as shown in FIG. 3, the contents of register 11 are as follows:
The content is the same as that of , and the integer part, decimal point code, and decimal part are formed in the register, and at this time registers 111 and 112
, 113.11' are as shown in FIG. 4C.

Next, proceed to the step shown in FIG. 2 and command "left shift R1".
1 (SZ)'', the entire group of numerical values in the register 11 is shifted to the upper position by one digit to the left, and the contents of the least significant digit of the numerical value that was in the "s digit" are returned to the "L digit".

In this way, as shown in the third diagram, a decimal point code is inserted into a predetermined numerical digit in the register 11.
The register 18 maintains the same state until step fi in FIG. 2 is reached.

Therefore, in the embodiment shown in FIG.
By applying the contents of 0000 to 1001 as numbers O to 9 and applying the A code 1010 as a decimal point to the decoder 20, the display 21 is driven by the decoded output. It can be output together with numerical information.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an information processing apparatus according to the present invention, in which 11 is a register for storing information to be displayed or printed, 12 is a register, 18 is a register for indicating the digit to which information is transferred, and 20 is a register for storing information to be displayed or printed. a decoder, and 21 a display. FIG. 2 is a flowchart showing the operation of the information processing apparatus shown in FIG. FIG. 3 is an explanatory diagram showing changes in the contents of register 11, register 12, and register 18 when the apparatus of FIG. 1 operates according to the flowchart. FIG. 4 shows waveforms of the four registers 111, 112, 113, and 11' making up the register 11. FIG. 5 shows the types of times that specify the execution of various instructions.

Claims (1)

[Claims] 1. A first storage means that stores numerical information, a second storage means that stores the numerical information, and a decimal point code in all digits above the digit where the decimal point of the numerical information in the second storage means should be inserted. After inserting the signal, the information in the second storage means is moved one digit to the lower digit side, and then the numerical information above the decimal point in the first storage means is inserted into the second storage device. An information processing device characterized by: