JPS5454545A - Register readout system - Google Patents
Register readout systemInfo
- Publication number
- JPS5454545A JPS5454545A JP12115277A JP12115277A JPS5454545A JP S5454545 A JPS5454545 A JP S5454545A JP 12115277 A JP12115277 A JP 12115277A JP 12115277 A JP12115277 A JP 12115277A JP S5454545 A JPS5454545 A JP S5454545A
- Authority
- JP
- Japan
- Prior art keywords
- register
- logical
- output
- address
- designated
- 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
Landscapes
- Executing Machine-Instructions (AREA)
Abstract
PURPOSE: To shorten the time required for production of the operand address, by constituting the readout output of register to a specific value, when the specific bit of instruction has a given value.
CONSTITUTION: The all zero described in the B and X field of the macroinstruction 50 represents the disuse of the field corresponded, then the logical 1 is written in the specific bit P of the microinstruction stored in the microinstruction storing register 8. When the entried values B and X are read out from the address designation register 1, the zero discriminating circuit 2 outputs logical 1 to the signal line 4, and AND circuit 10 outputs 11 entirely logical 0. Further, the bit P is logical 0, then the output 7 of the conventional register 9 designated with the address information line 3 is appeared at the output line 11 as it is. Thus, when the register 9 is designated with the values B, X, the displacement D is added to the value obtained from the output 11, then the operand address is developed. Further, the time required for the production can be shortened
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12115277A JPS5454545A (en) | 1977-10-08 | 1977-10-08 | Register readout system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12115277A JPS5454545A (en) | 1977-10-08 | 1977-10-08 | Register readout system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5454545A true JPS5454545A (en) | 1979-04-28 |
Family
ID=14804125
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12115277A Pending JPS5454545A (en) | 1977-10-08 | 1977-10-08 | Register readout system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5454545A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58114246A (en) * | 1981-12-28 | 1983-07-07 | Fujitsu Ltd | Address qualifying system |
-
1977
- 1977-10-08 JP JP12115277A patent/JPS5454545A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58114246A (en) * | 1981-12-28 | 1983-07-07 | Fujitsu Ltd | Address qualifying system |
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