JPS5578343A - Information processing unit - Google Patents
Information processing unitInfo
- Publication number
- JPS5578343A JPS5578343A JP15192878A JP15192878A JPS5578343A JP S5578343 A JPS5578343 A JP S5578343A JP 15192878 A JP15192878 A JP 15192878A JP 15192878 A JP15192878 A JP 15192878A JP S5578343 A JPS5578343 A JP S5578343A
- Authority
- JP
- Japan
- Prior art keywords
- instruction
- registers
- register
- instruction execution
- microprogram
- 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 an instruction execution cycle time by driving directly the address signal of the register file of a CPU, which is constituted by a microprocessor, by the register output.
CONSTITUTION: The addressing signal of the register file in a microprocessor is driven directly by outputs of registers GRA19 and GRB20. In a micro step just before instruction word processing start, a field used for a general register command in the instruction word is inputted to registers 19 and 20. As the result, the clock cycle of the CPU in instruction execution becomes rapid, and it is unnecessary that a part of the instruction is transferred to registers 19 and 20 by a microprogram, and further, the instruction execution cycle time can be shortened by accessing general register GR designated by the instrcution immediately in the microprogram of the instruction processing.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15192878A JPS5578343A (en) | 1978-12-11 | 1978-12-11 | Information processing unit |
US06/100,447 US4347566A (en) | 1978-12-11 | 1979-12-05 | Data processor with register file and arithmetic logic circuit on one chip and register means directly connected to the chip |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15192878A JPS5578343A (en) | 1978-12-11 | 1978-12-11 | Information processing unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5578343A true JPS5578343A (en) | 1980-06-12 |
Family
ID=15529256
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15192878A Pending JPS5578343A (en) | 1978-12-11 | 1978-12-11 | Information processing unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5578343A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60107138A (en) * | 1983-10-03 | 1985-06-12 | デイジタル イクイツプメント コ−ポレイシヨン | Central processing unit for digital computer |
US4812971A (en) * | 1983-10-03 | 1989-03-14 | Digital Equipment Corporation | Central processing unit for a digital computer |
-
1978
- 1978-12-11 JP JP15192878A patent/JPS5578343A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60107138A (en) * | 1983-10-03 | 1985-06-12 | デイジタル イクイツプメント コ−ポレイシヨン | Central processing unit for digital computer |
JPS6339931B2 (en) * | 1983-10-03 | 1988-08-09 | Digital Equipment Corp | |
US4812971A (en) * | 1983-10-03 | 1989-03-14 | Digital Equipment Corporation | Central processing unit for a digital computer |
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