JPS54126437A - Program control method - Google Patents
Program control methodInfo
- Publication number
- JPS54126437A JPS54126437A JP3447678A JP3447678A JPS54126437A JP S54126437 A JPS54126437 A JP S54126437A JP 3447678 A JP3447678 A JP 3447678A JP 3447678 A JP3447678 A JP 3447678A JP S54126437 A JPS54126437 A JP S54126437A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- program
- instruction
- return
- decoder
- 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 reduce the number of program steps by programming the next step return instruction when the control is returned from subroutine SR or interrupt routine IR to main routine MR.
CONSTITUTION: Program unit 3 including ROM is addressed by program counter 2 which is controlled by program control circuit 1. Instructions from unit 3 are decoded by instruction decoder 4 and are given to circuit 1, etc. Instruction SKA1 which commands skip if the first bit of accumulator 8 in decoder 4 is "1" is given to decision circuit 7, and circuit 7 outputs "1" or "0" according to contents of the first bit of accumulator 8 and gives it to decoder 4. When instruction NXTRTN which commands return in the next step is decoded, it is delayed in delay circuit 5 by one program step and is outputted. The output of circuit 5 is given to circuit 1 through gate 6 together with normal return instruction RTN. As a result, the number of return program steps can be reduced.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3447678A JPS54126437A (en) | 1978-03-24 | 1978-03-24 | Program control method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3447678A JPS54126437A (en) | 1978-03-24 | 1978-03-24 | Program control method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54126437A true JPS54126437A (en) | 1979-10-01 |
Family
ID=12415296
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3447678A Pending JPS54126437A (en) | 1978-03-24 | 1978-03-24 | Program control method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54126437A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5161749A (en) * | 1974-11-26 | 1976-05-28 | Fujitsu Ltd | Deetashorisochino shoriringuseigyohoshiki |
JPS51147143A (en) * | 1975-06-13 | 1976-12-17 | Hitachi Ltd | Micro program control mechanism |
-
1978
- 1978-03-24 JP JP3447678A patent/JPS54126437A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5161749A (en) * | 1974-11-26 | 1976-05-28 | Fujitsu Ltd | Deetashorisochino shoriringuseigyohoshiki |
JPS51147143A (en) * | 1975-06-13 | 1976-12-17 | Hitachi Ltd | Micro program control mechanism |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS549380A (en) | Sequence controller | |
JPS54126437A (en) | Program control method | |
JPS5344134A (en) | Microprogram control system | |
JPS54117640A (en) | Memory address designation system | |
JPS54101237A (en) | Malfunction prevention system for electronic circuit | |
JPS54161856A (en) | Starting method of microprocessor | |
JPS5663607A (en) | Sequence control unit | |
JPS5426631A (en) | Inspection system of rom | |
JPS5445550A (en) | Digital protection control unit | |
JPS553043A (en) | Microcomputer control circuit | |
JPS54134273A (en) | Sequence controller | |
JPS55121546A (en) | Interruption control system | |
JPS55115104A (en) | Step sequence control system | |
JPS54120547A (en) | Microprogram memory controller | |
JPS57166605A (en) | Sequence controller | |
JPS54134276A (en) | Program timer | |
JPS5769308A (en) | Scan-type programmable logic controller | |
JPS54142025A (en) | Address system | |
JPS5371344A (en) | Programing equipment for cooking equipment | |
JPS533033A (en) | Code branching system for intelligent terminal unit | |
JPS5663651A (en) | Program control unit | |
JPS54158154A (en) | Method and apparatus for analog-digiral conversion | |
JPS5775367A (en) | Microcomputer | |
JPS5671149A (en) | Data processing device | |
JPS55116105A (en) | Multiple repetition control system of numerical controller |