JPS55121542A - Arithmetic control system - Google Patents
Arithmetic control systemInfo
- Publication number
- JPS55121542A JPS55121542A JP2950379A JP2950379A JPS55121542A JP S55121542 A JPS55121542 A JP S55121542A JP 2950379 A JP2950379 A JP 2950379A JP 2950379 A JP2950379 A JP 2950379A JP S55121542 A JPS55121542 A JP S55121542A
- Authority
- JP
- Japan
- Prior art keywords
- byte
- flag
- alu1
- registers
- arithmetic
- 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.)
- Granted
Links
Landscapes
- Advance Control (AREA)
- Executing Machine-Instructions (AREA)
Abstract
PURPOSE: To reduce flag registers by increasing a processing rate by providing instruction assignment area of a microprocessor for every byte, and also by providing flag registers, stored with flag states of arithmetic results, for every byte.
CONSTITUTION: Arithmetic controller ALU1 performing the logical operation of one lower byte and ALU2 for that of one higher byte are connected to ALU output bus 3 for one lower byte and ALU output bus 4 for one higher byte. External operation mode indication signals 5 and 6 for one lower byte and one higher byte are inputted to ALU1 and ALU2. Flag registers 7 and 8 are stored with flag states of the arithmetic result of ALU1 for one lower byte and one higher byte, respectively. According to the content of the instruction assignment area for microinstructions, corresponding microprocessors are given independent operation indications to update the contents of registers 7 and 8 separately.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2950379A JPS55121542A (en) | 1979-03-14 | 1979-03-14 | Arithmetic control system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2950379A JPS55121542A (en) | 1979-03-14 | 1979-03-14 | Arithmetic control system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55121542A true JPS55121542A (en) | 1980-09-18 |
JPS616410B2 JPS616410B2 (en) | 1986-02-26 |
Family
ID=12277880
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2950379A Granted JPS55121542A (en) | 1979-03-14 | 1979-03-14 | Arithmetic control system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55121542A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07191964A (en) * | 1994-08-05 | 1995-07-28 | Sanyo Electric Co Ltd | Digital signal processor |
-
1979
- 1979-03-14 JP JP2950379A patent/JPS55121542A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07191964A (en) * | 1994-08-05 | 1995-07-28 | Sanyo Electric Co Ltd | Digital signal processor |
Also Published As
Publication number | Publication date |
---|---|
JPS616410B2 (en) | 1986-02-26 |
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