JPS5447542A - Sequence control check system - Google Patents
Sequence control check systemInfo
- Publication number
- JPS5447542A JPS5447542A JP11336077A JP11336077A JPS5447542A JP S5447542 A JPS5447542 A JP S5447542A JP 11336077 A JP11336077 A JP 11336077A JP 11336077 A JP11336077 A JP 11336077A JP S5447542 A JPS5447542 A JP S5447542A
- Authority
- JP
- Japan
- Prior art keywords
- register
- address
- steal
- shunted
- contents
- 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 ensure a simple and assured confirmation of the normalness of the sequence control in the microprogram control of plural steal levels, by providing the control memory address checking register and the fixed pattern detector circuit.
CONSTITUTION: When a steal is given from microprogram routine (μPR) A to B, microorder address X is shunted to shunt register 3. In case a steal is given from μPRB to C and from C to D, microorder address Y and Z are shunted to shunt register 4 and 5 respectively. At the same instant, the contents of address checking register 7 is shifted to register 8. The contents of address register 2 along with the shunt address order are put into NOR circuit 6, and the output is stored in register 7. This action is performed sequentially by the order shunted to register 5, 4 and 3. When all steals are through, fixed pattern detection circuit 9 checks whether the contents of register 7 is turned to the set fixed pattern. And then whether the steal and the return action are normal or not is made sure
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11336077A JPS5447542A (en) | 1977-09-22 | 1977-09-22 | Sequence control check system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11336077A JPS5447542A (en) | 1977-09-22 | 1977-09-22 | Sequence control check system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5447542A true JPS5447542A (en) | 1979-04-14 |
Family
ID=14610298
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11336077A Pending JPS5447542A (en) | 1977-09-22 | 1977-09-22 | Sequence control check system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5447542A (en) |
-
1977
- 1977-09-22 JP JP11336077A patent/JPS5447542A/en active Pending
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