JPS5580154A - Microprogram control unit - Google Patents
Microprogram control unitInfo
- Publication number
- JPS5580154A JPS5580154A JP15543278A JP15543278A JPS5580154A JP S5580154 A JPS5580154 A JP S5580154A JP 15543278 A JP15543278 A JP 15543278A JP 15543278 A JP15543278 A JP 15543278A JP S5580154 A JPS5580154 A JP S5580154A
- Authority
- JP
- Japan
- Prior art keywords
- stores
- rom6
- ram7
- instruction
- memory
- 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
Abstract
PURPOSE: To make it possible to change a program partially temporarily and confirm the operation of a control object device by executing the program of a readable memory in stead of a read-only memory by outputs of a comparator circuit for micro instruction addresses and a kip instruction generation circuit.
CONSTITUTION: Read-only memory ROM6 which is connected to maintenance control part 1 and stores micro instructions and readable read/write memory RAM7 which stores instructions to be stored in ROM6 are provided. This maintenance control part 1 is provided with address register 9 which stores addresses of ROM6, comparator circuit 12 which compares outputs of register 9 and address bus 5 with each other, and SRFF 15 which stores the output of AND gate 11. Further, address register 18 which stores addresses of RAM7 and skip instruction generation circuit 20 which generates a skip instruction by a skip code are provided, and an address of RAM7 is designated in stead of ROM6 by outputs of gate 11 and circuit 20, and execution of the instruction is executed by RAM7.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15543278A JPS5580154A (en) | 1978-12-13 | 1978-12-13 | Microprogram control unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15543278A JPS5580154A (en) | 1978-12-13 | 1978-12-13 | Microprogram control unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5580154A true JPS5580154A (en) | 1980-06-17 |
Family
ID=15605883
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15543278A Pending JPS5580154A (en) | 1978-12-13 | 1978-12-13 | Microprogram control unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5580154A (en) |
-
1978
- 1978-12-13 JP JP15543278A patent/JPS5580154A/en active Pending
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