JPS564849A - Microprogram control unit - Google Patents
Microprogram control unitInfo
- Publication number
- JPS564849A JPS564849A JP8039079A JP8039079A JPS564849A JP S564849 A JPS564849 A JP S564849A JP 8039079 A JP8039079 A JP 8039079A JP 8039079 A JP8039079 A JP 8039079A JP S564849 A JPS564849 A JP S564849A
- Authority
- JP
- Japan
- Prior art keywords
- bit error
- circuit
- rewrite
- detected
- microinstruction
- 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
- Detection And Correction Of Errors (AREA)
Abstract
PURPOSE: To prevent the degrading of performance due to one bit error of the control memory, by placing the rewrite-in to the control memory after the correction of one bit error detected at the readout of microinstruction under the control of microprogram.
CONSTITUTION: The microprogram sequentially reads out the content of the control memory 1 indicated at the microinstruction address register 2 to the microinstruction register 3. The content of the register 3 is inspected at the one bit error detection circuit 4. The signal at the circuit 4 is informed to the rewrite-in determining circuit 9. The circuit 9 starts the rewrite-in circuit 6 according to the output of FF7 indicating the propriety of rewrite-in. When one bit error is detected, the microinstruction detected for the error is corrected at the one bit error correction circuit 5 and executed. When one bit error is produced and the event of correction is detected at the microprogram, suitable processing is executed.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8039079A JPS564849A (en) | 1979-06-26 | 1979-06-26 | Microprogram control unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8039079A JPS564849A (en) | 1979-06-26 | 1979-06-26 | Microprogram control unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS564849A true JPS564849A (en) | 1981-01-19 |
Family
ID=13716952
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8039079A Pending JPS564849A (en) | 1979-06-26 | 1979-06-26 | Microprogram control unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS564849A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58132839A (en) * | 1982-02-01 | 1983-08-08 | Nec Corp | Fault recovery device |
JPS6242038U (en) * | 1985-08-30 | 1987-03-13 |
-
1979
- 1979-06-26 JP JP8039079A patent/JPS564849A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58132839A (en) * | 1982-02-01 | 1983-08-08 | Nec Corp | Fault recovery device |
JPS6242038U (en) * | 1985-08-30 | 1987-03-13 |
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