JPS5549751A - Microprogram control unit - Google Patents
Microprogram control unitInfo
- Publication number
- JPS5549751A JPS5549751A JP12224478A JP12224478A JPS5549751A JP S5549751 A JPS5549751 A JP S5549751A JP 12224478 A JP12224478 A JP 12224478A JP 12224478 A JP12224478 A JP 12224478A JP S5549751 A JPS5549751 A JP S5549751A
- Authority
- JP
- Japan
- Prior art keywords
- instruction
- main memory
- microprogram
- specific
- counter
- 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 prevent an overhead caused by a store operation by storing only a specific routine contributing to system performance improvement into a control storage unit.
CONSTITUTION: A specific instruction is read from main memory 1 and accesses auxiliary control memory 9 and reads a start address of microprogram in main memory 4. Instruction words from the main memory are sent to microprogram substitute decision circuit 15 and are stored into register 16. The instruction is decoded in decoder 17, and adds 1 to counter 18 or 19 depending on the result. When the counter is overflowed within a fixed time, operation part 6 is interrupted to store a microprogram corresponding to the specific instruction to be executed into main memory 4. A routine corresponding to the specific instruction is stored if this instruction is executed over a prescrived frequency.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12224478A JPS5549751A (en) | 1978-10-03 | 1978-10-03 | Microprogram control unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12224478A JPS5549751A (en) | 1978-10-03 | 1978-10-03 | Microprogram control unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5549751A true JPS5549751A (en) | 1980-04-10 |
Family
ID=14831151
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12224478A Pending JPS5549751A (en) | 1978-10-03 | 1978-10-03 | Microprogram control unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5549751A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5981693A (en) * | 1982-10-30 | 1984-05-11 | 日本精機株式会社 | Field light emitting display |
-
1978
- 1978-10-03 JP JP12224478A patent/JPS5549751A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5981693A (en) * | 1982-10-30 | 1984-05-11 | 日本精機株式会社 | Field light emitting display |
JPH037116B2 (en) * | 1982-10-30 | 1991-01-31 | Japan Engine Valve Mfg |
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