JPS5680746A - Microprogram controlling device - Google Patents
Microprogram controlling deviceInfo
- Publication number
- JPS5680746A JPS5680746A JP15766979A JP15766979A JPS5680746A JP S5680746 A JPS5680746 A JP S5680746A JP 15766979 A JP15766979 A JP 15766979A JP 15766979 A JP15766979 A JP 15766979A JP S5680746 A JPS5680746 A JP S5680746A
- Authority
- JP
- Japan
- Prior art keywords
- microprogram
- branch condition
- condition input
- instructions
- controlling device
- 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 reduce the generation amount of microprogram instructions while shortening a test time when testing branch condition inputs, by adding a branch condition input selective compressing circuit.
CONSTITUTION: For example, a microprogram instruction assigns and executes condition assignment A0A1A2A3=0101. From branch condition input selective compressing circuit 105, compressed branch condition input B0B1B2B3=00X1X3 is obtained and then inputted to address register 102 to determine microprogram instructions to be executed next. Therefore, those microprogram instructions depend upon the state of branch condition input X1X3 and the number of them is four. In the figure, 101 is a microprogram memory, 103 is a microprogram instruction register, and 104 is a microprogram control part.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15766979A JPS5680746A (en) | 1979-12-05 | 1979-12-05 | Microprogram controlling device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15766979A JPS5680746A (en) | 1979-12-05 | 1979-12-05 | Microprogram controlling device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5680746A true JPS5680746A (en) | 1981-07-02 |
Family
ID=15654783
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15766979A Pending JPS5680746A (en) | 1979-12-05 | 1979-12-05 | Microprogram controlling device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5680746A (en) |
-
1979
- 1979-12-05 JP JP15766979A patent/JPS5680746A/en active Pending
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