JPS5556254A - Arithmetic controller - Google Patents
Arithmetic controllerInfo
- Publication number
- JPS5556254A JPS5556254A JP12861978A JP12861978A JPS5556254A JP S5556254 A JPS5556254 A JP S5556254A JP 12861978 A JP12861978 A JP 12861978A JP 12861978 A JP12861978 A JP 12861978A JP S5556254 A JPS5556254 A JP S5556254A
- Authority
- JP
- Japan
- Prior art keywords
- arithmetic
- register
- stored
- micro
- address
- 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 simplify comtrol of arithmetic excution with good efficiency by providing an arithmetic controller with micro-ROM stored with a microprogram and naro- ROM stored with a nono-program supporting functions of the microprogram.
CONSTITUTION: Control memory controller 300 and arithmetic control part 400 of an arithmetic controller are connected together through buses ABUS to CBUS; while microinstructions read out from a main memory unit are stored in register 310, codes of microinstructions among them are registered from register 320 in micro- ROM address register 360 to read micro-ROM370 corresponding to the address, which is stored in register 380. When its contents are an arithmetic code, access from bus CBUS as an address of nano-ROM410 of arithmetic control part 400 is attained to register a nano-instruction in register 420 and it is decoded by decoder 430 for arithmetic of data on buses ABUS and BBUS.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12861978A JPS5556254A (en) | 1978-10-20 | 1978-10-20 | Arithmetic controller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12861978A JPS5556254A (en) | 1978-10-20 | 1978-10-20 | Arithmetic controller |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5556254A true JPS5556254A (en) | 1980-04-24 |
Family
ID=14989258
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12861978A Pending JPS5556254A (en) | 1978-10-20 | 1978-10-20 | Arithmetic controller |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5556254A (en) |
-
1978
- 1978-10-20 JP JP12861978A patent/JPS5556254A/en active Pending
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