JPS58225418A - Diagnosis controlling system of input and output device - Google Patents

Abstract

PURPOSE:To decrease the self-diagnosing time, by providing a resident self- diagnosing means consisting of plural units of execution, a means which selects the unit of execution of said diagnosing means, a means which executes only the selected unit of execution for self-diagnosis. CONSTITUTION:For a resident self-diagnosing means consisting of plural units of execution, the information on a self-diagnosis routine to be diagnosed and given from a host device is stored in an information routine designating register 4. At the same time, a diagnosis start signal D is supplied to a microinstruction reading address part 2, and the reading address is set to a fixed storage part 1. Then a head microinstruction of a self-diagnosis routine (a) is designated at the part 2 and then executed at a microinstruction executing part 3. The result of execution is stored in a register 5, and at the same time, the start address of a self-diagnosis routine (b) is stored in a jumping address storing register 6. Then a comparator 7 transmits a logical product of the contents of the register which are stored in the hot device and the contents of the diagnosis routine discriminating register 5.

Description

[Detailed description of the invention] [Description of the technical field to which the invention pertains] The present invention relates to a control method for an information processing device.

In particular, the present invention relates to a control method for a resident self-diagnosis function in an input/output device.

[Description of prior art]

Conventionally, an input/output device having a resident self-diagnosis function executes the self-diagnosis function in response to an instruction from a host device when a failure occurs, but all self-diagnosis functions are executed regardless of the nature of the failure.

Therefore, an input/output device with abundant resident self-diagnosis functions has the drawback that it takes a long time to diagnose the device and it takes time to report the self-diagnosis results after a failure occurs.

[Detailed description of the invention]

The present invention improves this point, and aims to provide a diagnostic control method for input/output devices that can shorten the self-diagnosis time.

[Summary of the invention]

The present invention provides a resident self-diagnosis means consisting of a plurality of execution units, a means for selecting the self-diagnosis execution unit according to a specification from a host device, and sequential execution of only the self-diagnosis execution units selected by the selection means. and means for reporting the diagnosis result to a host device upon completion of the selected self-diagnosis.

[Detailed description of the invention]

An embodiment of the present invention will be described based on the drawings.

Ru. The figure shows a fixed storage section 1 in which self-diagnosis routines a to h are stored, a microinstruction read address section 2, a microinstruction execution section 3 that executes a microinstruction designated by this microinstruction readout address section 2, and an upper The device sets the bits a' to h' corresponding to the self-diagnosis routines a to "h" to logic r1. to store the designated diagnostic routine designation information. By each leading microinstruction, each diagnostic routine (a)/-h' only corresponds to the logic r.
1. a diagnostic routine identification register 5 in which information about the diagnosis is stored; a destination address storage register 6 in which the start address of the next self-diagnosis routine is stored by each leading microinstruction of each self-diagnosis routine a''-h; Compare the contents of the routine designation register 4 and the contents of the diagnostic routine identification register 5, and if they do not match, Kli'%7 Fl
/-'=@mly Ixfi 6 f) Content'"1"
(from a comparison circuit 7 which is set in the instruction read address section 2, and a diagnosis result storage register 9 in which the diagnosis result from the microinstruction execution section 3 is stored when the self-diagnosis routine a = h finishes execution. configured.

With this configuration, the host device is now running the self-diagnosis routine b.
The characteristic operation of the present invention will be described in the case where only execution of the following is specified.

Information in which only the bit b' corresponding to the self-diagnosis routine b to be diagnosed is set to logic r1- is sent from the host device, and this information is stored in the diagnostic routine designation register 4. Also,
The host device uses the diagnostic activation signal p as logic! The read address of the microinstruction read address section 2 of this diagnostic activation signal 11 is set at the beginning of the fixed storage section 1.

In this state, the self-diagnosis operation is started, the microinstruction read address section 2 specifies the first microinstruction of the self-diagnosis routine a, and this first microinstruction is executed by the microinstruction execution section 3. In this microinstruction, only the bit I corresponding to the self-diagnosis routine 3 stores the information of logic fIJ in the diagnostic routine identification 1j register 5, and stores the start address of the self-diagnosis routine b in the destination address storage register 6. In the comparison circuit 7, the contents of the diagnostic routine designation register 4 and the contents of the diagnostic routine identification register 5 stored in the host device are ANDed. Diagnostic routine designation register 40 pit a' corresponding to self-diagnostic routine a is logic r.
Since it is OJ, the result of logical product is logical rg. Therefore, the start address of the self-diagnosis routine b stored in the destination address storage register 6 is stored in the microinstruction read address sound μ2. Control is transferred from K to self-diagnosis routine b, and diagnosis by self-diagnosis routine a ('
! Not done.

Similarly, in the self-diagnosis routine b, the start address of the self-diagnosis routine C is stored in the destination address storage register 61tc from the first microinstruction 2, and only the bit ♂ corresponding to the self-diagnosis routine b is stored in the diagnosis routine identification register 5. Set to logic r1J. At this time, the diagnostic routine specification register 4 corresponding to self-diagnostic routine b)
Since the b/car cycle r I J, the resultant power of the logical product in the comparator circuit 7 becomes the logic rlJ. Therefore, the start address of the self-diagnosis routine C stored in the destination address storage register 6 is not stored in the microinstruction read address section 2, and the microinstructions in the self-diagnosis routine B are sequentially executed and diagnosed. Ru.

Hereinafter, in the self-diagnosis routine c-h, as in the case of the self-diagnosis routine a, since the execution is not specified in the diagnostic routine specification register 4, the comparison circuit 7 outputs the logic rOJ and the diagnosis is not executed, and the self-diagnosis routine is not executed. After completing routine b, all diagnostics are completed. The execution results of self-diagnosis routine b are stored in the diagnosis result storage register 9 and reported to the host device.

[Detailed description of the invention]

As explained above, according to the present invention, by making it possible to select a resident diagnostic function from a host device, one diagnostic time can be significantly shortened.

[Brief explanation of drawings]

The figure is a block diagram of main parts of the system according to the embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Fixed storage section, 2... Microphone i instruction read address section, 3... Micro instruction execution section, 4... Diagnostic routine N constant register, 5... Diagnostic routine identification register, 6... - Destination address storage register, 7... Comparison circuit, 9... Diagnosis result storage register. Patent Applicant: NEC Corporation Representative, Patent Attorney: Takashi Izunao

Claims (1)

[Claims] (1) A fixed memory section that stores a plurality of self-diagnosis routines for each execution unit, a microinstruction read address section that specifies the read address of this fixed memory section, and a self-diagnosis routine instructed by this address section. In a diagnostic control method for an input/output device, the input/output device has a microinstruction execution unit configured to sequentially read the contents of the fixed storage unit from the beginning and sequentially execute a self-diagnosis routine; A circuit that stores diagnostic routine information; a jump address storage circuit that stores the start address of the next self-diagnosis routine by executing the first microinstruction of the self-diagnosis routine; A diagnostic routine identification circuit that stores information for identifying a self-diagnosis routine, and a comparison circuit that compares the contents of the storage circuit and the diagnostic routine identification circuit, and when the comparison circuit does not have a matching output, the address section A diagnostic control method for an input/output device, characterized in that the content of the input/output device is controlled to be updated to the content of the destination address storage circuit.