JPS55134449A - Microprogram control unit - Google Patents
Microprogram control unitInfo
- Publication number
- JPS55134449A JPS55134449A JP4100279A JP4100279A JPS55134449A JP S55134449 A JPS55134449 A JP S55134449A JP 4100279 A JP4100279 A JP 4100279A JP 4100279 A JP4100279 A JP 4100279A JP S55134449 A JPS55134449 A JP S55134449A
- Authority
- JP
- Japan
- Prior art keywords
- address
- instruction
- selector
- program
- 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
Abstract
PURPOSE: To use one call instruction to call plural program processing routines on the basis of the operand address and set freely the operand address and the program address.
CONSTITUTION: Instruction register 1 is constituted by instruction code part 2 and operand address part 3 to hold an executed software instruction, and the instruction of code part 2 is applied to instruction decoder 4, and a microprogram address for the basic instruction is applied to selector 6, and the address of address part 3 is applied to selector 6 through address conversion circuit 5. The program address output from decoder 4 or circuit 5 is selected by this selector 6 under the control of selector control circuit 10 where the instruction code is input, and at a call instruction execution time, the output of circuit 5 is supplied to address register 7, and at other times, the output of decoder 4 is supplied to address register 7. Then, the operand address and the program address are set freely and are transferred to a memory unit.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4100279A JPS55134449A (en) | 1979-04-06 | 1979-04-06 | Microprogram control unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4100279A JPS55134449A (en) | 1979-04-06 | 1979-04-06 | Microprogram control unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55134449A true JPS55134449A (en) | 1980-10-20 |
Family
ID=12596190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4100279A Pending JPS55134449A (en) | 1979-04-06 | 1979-04-06 | Microprogram control unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55134449A (en) |
-
1979
- 1979-04-06 JP JP4100279A patent/JPS55134449A/en active Pending
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