JPS57161940A - Central processing device - Google Patents
Central processing deviceInfo
- Publication number
- JPS57161940A JPS57161940A JP4635581A JP4635581A JPS57161940A JP S57161940 A JPS57161940 A JP S57161940A JP 4635581 A JP4635581 A JP 4635581A JP 4635581 A JP4635581 A JP 4635581A JP S57161940 A JPS57161940 A JP S57161940A
- Authority
- JP
- Japan
- Prior art keywords
- output
- branch
- register
- address
- inputted
- 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
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/22—Microcontrol or microprogram arrangements
- G06F9/26—Address formation of the next micro-instruction ; Microprogram storage or retrieval arrangements
- G06F9/262—Arrangements for next microinstruction selection
- G06F9/264—Microinstruction selection based on results of processing
Landscapes
- Engineering & Computer Science (AREA)
- Software Systems (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Executing Machine-Instructions (AREA)
Abstract
PURPOSE:To utilize effectively areas in a storage device, by providing a branch address part, a branch control part, and an operation control part in a microprogram instruction to use them as an address designating area or for the operation control. CONSTITUTION:An instruction address is stored into an address register 19 from a storage device 11, and one output of the register 19 is inputted to the storage device 11, and the other is inputted to a counter 182. Gates 20-22 are provided in the input side of the register 19 and are connected to the register 19 selectively. A branch controlling part 18 consists of a branch controlling circuit 181 and the counter 182, and the output of the branch controlling circuit 181 is conneted to gates 20-22 through transmission lines 15-17. The input is a branch condition signal and an output of a control bit 3B. The output of the counter 182 and the output of the branch controlling circuit 181 are connected to the gate 22. The output of an instruction control part 23 is inputted to the gate 20 to operate a microprogram.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4635581A JPS57161940A (en) | 1981-03-31 | 1981-03-31 | Central processing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4635581A JPS57161940A (en) | 1981-03-31 | 1981-03-31 | Central processing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57161940A true JPS57161940A (en) | 1982-10-05 |
Family
ID=12744836
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4635581A Pending JPS57161940A (en) | 1981-03-31 | 1981-03-31 | Central processing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57161940A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0225931A (en) * | 1988-07-14 | 1990-01-29 | Hitachi Ltd | Microprogram control system |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4979142A (en) * | 1972-12-01 | 1974-07-31 | ||
JPS5398752A (en) * | 1977-02-10 | 1978-08-29 | Hitachi Ltd | Microprogram control system |
-
1981
- 1981-03-31 JP JP4635581A patent/JPS57161940A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4979142A (en) * | 1972-12-01 | 1974-07-31 | ||
JPS5398752A (en) * | 1977-02-10 | 1978-08-29 | Hitachi Ltd | Microprogram control system |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0225931A (en) * | 1988-07-14 | 1990-01-29 | Hitachi Ltd | Microprogram control system |
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