JPS5559550A - Microprogram control unit - Google Patents
Microprogram control unitInfo
- Publication number
- JPS5559550A JPS5559550A JP13218678A JP13218678A JPS5559550A JP S5559550 A JPS5559550 A JP S5559550A JP 13218678 A JP13218678 A JP 13218678A JP 13218678 A JP13218678 A JP 13218678A JP S5559550 A JPS5559550 A JP S5559550A
- Authority
- JP
- Japan
- Prior art keywords
- branch
- μpg
- address
- subfield
- 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
Abstract
PURPOSE: To eliminate the useless action cycle and to avoid the lowering of the performance by performing the address substitution of the microprogram (μPG) connected in a dynamic way independently from the μPG memory means.
CONSTITUTION: The μPG words are stored in μPG memory means 3 and then read out to be sent to register 6, and the contents of subfield 62 in register 6 is sent to arithmetic means 7 to control means 7. The two bits which control the branch are stored in subfield 62, and the branch address is stored in subfield 63. Based on the subfield contents, the control is given is sequence to the reading, the unconditional branch, the conditional branch and the link branch respectively. At the time of the unconditional branch and the conditional branch, the μPG to be executed is read out from means 3 via selection circuit 2 and based on the designagion address of field 63. In the case of the link branch, the contents of field 63 is given to address conversion means 8 to read out the μPG of the branch address which linked the converted address.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13218678A JPS5559550A (en) | 1978-10-27 | 1978-10-27 | Microprogram control unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13218678A JPS5559550A (en) | 1978-10-27 | 1978-10-27 | Microprogram control unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5559550A true JPS5559550A (en) | 1980-05-06 |
Family
ID=15075394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13218678A Pending JPS5559550A (en) | 1978-10-27 | 1978-10-27 | Microprogram control unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5559550A (en) |
-
1978
- 1978-10-27 JP JP13218678A patent/JPS5559550A/en active Pending
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