JPS5665251A - Instruction reexecution system - Google Patents
Instruction reexecution systemInfo
- Publication number
- JPS5665251A JPS5665251A JP14134179A JP14134179A JPS5665251A JP S5665251 A JPS5665251 A JP S5665251A JP 14134179 A JP14134179 A JP 14134179A JP 14134179 A JP14134179 A JP 14134179A JP S5665251 A JPS5665251 A JP S5665251A
- Authority
- JP
- Japan
- Prior art keywords
- instruction
- register
- execution
- processing unit
- reexecution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Retry When Errors Occur (AREA)
Abstract
PURPOSE: To guarantee the covery operation and elevate the reliability of a data processing unit without deteriorating the performance in the course of execution of the firmware instruction, by dividing the firmware instruction into modules.
CONSTITUTION: An instruction code is set to the control memory register CSR2 by reading out the microinstruction for indicating the start of execution of the instruction stored in the control memory CS1. A register code of this register 2 is selected by the register decoder DEC3, and it is provided to the AND gates 13, 14. The timings TP1, TR2 generated by processing unit are provided to said gates 13, 14, the logical product with an output of the decoder 3 is taken, and a signal for indicating the write operation of the address register 6 and the program counter 8, plus a signal for resetting the retry control FF9 which controls the reexecution of the instruction are output. And the software program instruction sequence by the processing unit is controlled by the counter 8 so that the covery operation can be executed without deteriorating the performance in the cource of execution of the firmware instruction.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14134179A JPS5665251A (en) | 1979-11-02 | 1979-11-02 | Instruction reexecution system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14134179A JPS5665251A (en) | 1979-11-02 | 1979-11-02 | Instruction reexecution system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5665251A true JPS5665251A (en) | 1981-06-02 |
Family
ID=15289699
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14134179A Pending JPS5665251A (en) | 1979-11-02 | 1979-11-02 | Instruction reexecution system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5665251A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4979650A (en) * | 1972-12-07 | 1974-08-01 |
-
1979
- 1979-11-02 JP JP14134179A patent/JPS5665251A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4979650A (en) * | 1972-12-07 | 1974-08-01 |
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