JPS6359181B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Object of the Invention The present invention relates to an information processing device, and particularly to a method for determining the connection state of hardware-divided circuits or devices.

(b) Prior Art Conventional methods for determining connection devices include (i) manually setting connection information by setting a flag in a specific recording circuit within the information processing device using a service processor or a direct key; Method (ii) The control device issues an access request to the controlled device and the control device recognizes that the connection is disconnected when no response signal is returned even after a predetermined period of time has passed (so-called timeout). There is a way. In method (i), connection information (flags, route FF, etc.) is manually set, so there is a problem with the method of guaranteeing against erroneous operations. The method (ii) has the disadvantage that it requires waiting for a predetermined period of time, and it takes longer as the number of unconnected circuits increases.

(c) Object of the present invention An object of the present invention is to provide an information processing device including a control device and a plurality of controlled devices, in which a plurality of controlled devices or circuits are provided to be controlled by the control device. It is an object of the present invention to provide a method for determining the connection state of a controlled device by using an interrupt request signal interface from a device without changing it.

(d) Key Points of the Invention The present invention turns on the interrupt request signal line from the controlled device when the device is powered on or resets the system, in order to use it to determine the connection state of the controlled device. By controlling the request signal so that it turns OFF after the control device recognizes it, the connection status of the controlled device can be easily determined without changing the conventional interface for interrupt requests. be.

(e) Embodiment of the invention FIG. 1 shows an embodiment of the invention, in which 1 is a control device, 2 to 4 are controlled devices, 5 to 7 are interrupt request signal lines from the controlled device to the control device, 8-1
0 is a connection information register indicating the connection state of the controlled devices 2 to 4 to the control device 1, 11 to 13 are normal interrupt request signal lines in the controlled devices, 14 to
16 is an OR circuit which connects the normal interrupt request signal lines 11 to 13 and the connection status registers 8 to 13;
The logical OR output with the output of 10 is connected to the interrupt request signal lines 5-7.

Now, when the connection information registers 8 to 10 of the controlled device are turned on by the power on or the system reset signal, the interrupt request signal lines 5 to 7 are activated via the OR circuits 14 to 16 and sent to the control device. to notify that each controlled device is connected.

Immediately after checking this interrupt request signal on the control device side, the connection information register 8 is
.about.10, for example, when a specific command is sent to the controlled device (route not shown), the command is received by the controlled device and the connection information register is reset.

Since the connection information registers 8 to 10 are set only by the above-mentioned power ON or system reset signal, they will not be turned ON again unless the power is turned ON or the system is reset. Lines 8 to 10 can be used as normal interrupt request signal lines.

Regarding the method of resetting the registers 8 to 10, the registers 8 to 10 can be reset not only by a command from the control device as described above, but also by the method of resetting them immediately after the control device 1 completes recognition of the signal through the interrupt request signal lines 5 to 7. It may be configured by hardware.

As is clear from the above explanation, it is necessary for the control device 1 to distinguish and control the interrupt request signal by separating it into a signal for determining the connection state of the controlled device and a normal interrupt request signal. Since these are not directly related to the gist of the present invention, they will be omitted here.

Although the present invention uses a 1:1 interrupt request signal line for the interrupt request signal interface, it goes without saying that the scope of application of the present invention is not limited to this.

(f) Effects of the Invention According to the present invention, the connection state of a controlled device or circuit can be determined simply by performing specific interrupt processing in the control device, which is effective in speeding up information processing and increasing reliability.

[Brief explanation of drawings]

FIG. 1 is a diagram illustrating an embodiment of the present invention. In the figure, 1 is a control device, 2 to 4 are controlled devices, 5 to 7 are interrupt request signal lines, and 8 to 10 are connection information registers.

Claims (1)

[Claims] 1. In an information processing device that includes a control device and a plurality of controlled devices or circuits that are controlled by the control device and have an interrupt request signal as an interface, the interrupt request signal is transmitted when the power is turned on or the system is reset. An information processing device that controls the interrupt request signal such that the interrupt request signal is turned ON, and after the control device recognizes the interrupt request signal, the interrupt request signal is turned OFF so that a normal interrupt request can be made thereafter, and determines the connection state of the controlled device. .