JPS54105442A - Microprogram control system - Google Patents
Microprogram control systemInfo
- Publication number
- JPS54105442A JPS54105442A JP1212578A JP1212578A JPS54105442A JP S54105442 A JPS54105442 A JP S54105442A JP 1212578 A JP1212578 A JP 1212578A JP 1212578 A JP1212578 A JP 1212578A JP S54105442 A JPS54105442 A JP S54105442A
- Authority
- JP
- Japan
- Prior art keywords
- register
- instruction
- microinstruction
- memory unit
- instruction code
- 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 shorten the execution time of an instruction, and also to reduce logic in amount without having a sequence control part such as an instruction code discrimination part, by directly supplying contents of an instruction register and arithmetic flag to a control memory unit.
CONSTITUTION: An instruction code is read out from the main memory unit and held by instruction register 1, and before being supplied to control memory unit 4 directly, and a microinstruction code to be executed first corresponding to the instruction code held by register 1 is outputted from unit 4 to microinstruction register 5 for the execution of the process, thereby finishing one step of the microinstruction. If the execution of the instruction code held by resister 1 requires several to tens steps, contents of register 1 are left as it is and microinstructions to be executed in sequence are prescribed by control counter 20 and arithmetic flag 22.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1212578A JPS54105442A (en) | 1978-02-06 | 1978-02-06 | Microprogram control system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1212578A JPS54105442A (en) | 1978-02-06 | 1978-02-06 | Microprogram control system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54105442A true JPS54105442A (en) | 1979-08-18 |
Family
ID=11796810
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1212578A Pending JPS54105442A (en) | 1978-02-06 | 1978-02-06 | Microprogram control system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54105442A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56111949A (en) * | 1980-02-08 | 1981-09-04 | Toshiba Corp | Arithmetic controller |
JPS6089249A (en) * | 1982-12-23 | 1985-05-20 | インタ−ナショナル ビジネス マシ−ンズ コ−ポレ−ション | Microword generation mechanism |
-
1978
- 1978-02-06 JP JP1212578A patent/JPS54105442A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56111949A (en) * | 1980-02-08 | 1981-09-04 | Toshiba Corp | Arithmetic controller |
JPS6089249A (en) * | 1982-12-23 | 1985-05-20 | インタ−ナショナル ビジネス マシ−ンズ コ−ポレ−ション | Microword generation mechanism |
JPS6323585B2 (en) * | 1982-12-23 | 1988-05-17 | Intaanashonaru Bijinesu Mashiinzu Corp |
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