JPS5687141A - Microprogram control device - Google Patents
Microprogram control deviceInfo
- Publication number
- JPS5687141A JPS5687141A JP16349979A JP16349979A JPS5687141A JP S5687141 A JPS5687141 A JP S5687141A JP 16349979 A JP16349979 A JP 16349979A JP 16349979 A JP16349979 A JP 16349979A JP S5687141 A JPS5687141 A JP S5687141A
- Authority
- JP
- Japan
- Prior art keywords
- address
- branch
- added
- stored
- 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 realize a simultaneous execution of a conditional branch when the subroutine is changed back to the main routine and thus realize a high-speed performance, by giving the branches to different addresses based on the conditions of the result of operation and others in case a branch is given to the return address which holds an instruction.
CONSTITUTION: The microinstruction containing the branch address is stored in the control memory 1. Then the instruction of the memory 1 is read out by the control register 2 to be supplied to the arithmetic device 12 and the selection circuit 9. Then +1 is added to the address of the circuit 9 through the adder 10, and 1 is added to the address which gives an access to the memory 1 to be stored in the 1st buffer register 5. At the same time, the address in which +N is added to the contents of the address register 11 is stored in the 2nd buffer register 7. The operation result of the device 12 undergoes a test through the test circuit 13, and the selection circuits 8 and 9 are controlled respectively according to the conditions of the operation result. Then the branch address of the microinstruction plus either one of registers 5 and 7 are selected to carry out the conditional branch.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16349979A JPS5687141A (en) | 1979-12-18 | 1979-12-18 | Microprogram control device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16349979A JPS5687141A (en) | 1979-12-18 | 1979-12-18 | Microprogram control device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5687141A true JPS5687141A (en) | 1981-07-15 |
Family
ID=15775019
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16349979A Pending JPS5687141A (en) | 1979-12-18 | 1979-12-18 | Microprogram control device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5687141A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62145326A (en) * | 1985-12-20 | 1987-06-29 | Toshiba Corp | Microprogram control circuit |
-
1979
- 1979-12-18 JP JP16349979A patent/JPS5687141A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62145326A (en) * | 1985-12-20 | 1987-06-29 | Toshiba Corp | Microprogram control circuit |
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