JPS55131849A - Microprogram controller - Google Patents
Microprogram controllerInfo
- Publication number
- JPS55131849A JPS55131849A JP3915679A JP3915679A JPS55131849A JP S55131849 A JPS55131849 A JP S55131849A JP 3915679 A JP3915679 A JP 3915679A JP 3915679 A JP3915679 A JP 3915679A JP S55131849 A JPS55131849 A JP S55131849A
- Authority
- JP
- Japan
- Prior art keywords
- register
- circuit
- macroinstructions
- address
- stored
- 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
Abstract
PURPOSE: To form efficiently a program of macroinstructions of a system, by changing operations of specific macroinstructions according to the content of a comparing register.
CONSTITUTION: In comparing register 5, instruction codes of specific macroinstructions are stored by macroinstructions and when macroinstructions are executed one after another, a macroinstruction insluding the same instruction code as the content of register 5 is stored in macroinstruction register 2, and in this case, converterd by decoder circuit 15 into the intial address of control storage 1, which is sent to address selecting circuit 8. The address outputted to circuit 8 is used to read and send an execution microinstruction to microinstruction register 4 and at the same time, "+1" is added to the address by "+1" adding circuit 16, whose output is stored in control memory address register 3. When the macroinstruction is stored in register 4, the microinstruction exercising output control over comparing circuit 6 allows the output to supply a permission signal to AND circuit 9.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3915679A JPS55131849A (en) | 1979-03-30 | 1979-03-30 | Microprogram controller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3915679A JPS55131849A (en) | 1979-03-30 | 1979-03-30 | Microprogram controller |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55131849A true JPS55131849A (en) | 1980-10-14 |
Family
ID=12545240
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3915679A Pending JPS55131849A (en) | 1979-03-30 | 1979-03-30 | Microprogram controller |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55131849A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4917150A (en) * | 1972-05-22 | 1974-02-15 | ||
JPS5245232A (en) * | 1975-10-08 | 1977-04-09 | Hitachi Ltd | Micro program modification circuit |
-
1979
- 1979-03-30 JP JP3915679A patent/JPS55131849A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4917150A (en) * | 1972-05-22 | 1974-02-15 | ||
JPS5245232A (en) * | 1975-10-08 | 1977-04-09 | Hitachi Ltd | Micro program modification circuit |
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