JPS5533225A - Arithmetic unit - Google Patents
Arithmetic unitInfo
- Publication number
- JPS5533225A JPS5533225A JP10577878A JP10577878A JPS5533225A JP S5533225 A JPS5533225 A JP S5533225A JP 10577878 A JP10577878 A JP 10577878A JP 10577878 A JP10577878 A JP 10577878A JP S5533225 A JPS5533225 A JP S5533225A
- Authority
- JP
- Japan
- Prior art keywords
- clock pulse
- time
- ram
- assigned
- register
- 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
Landscapes
- Executing Machine-Instructions (AREA)
Abstract
PURPOSE: To equalize a minimum machine cycle to one-bit time by using RAM in two-part structure which is read in downward time of a clock pulse and written in time from the fall of the clock pulse until its rise.
CONSTITUTION: From a microprogram controller, row addresses of 1st and 2nd RAMs 21 and 22 are outputted and by them, operated register A in the 2nd RAM and operational register B in the 1st RAM are assigned. Column addresses, on the other hand, are outputted to address counter 23 whose contents advance by clock pulse ϕ2 and address controller 24, so that digits of registers A and B will be assigned. In the downward time of 1st clock pulse ϕ1, the contents of the lowest digits of registers B and A are read out at the same time to 1st and 2nd buffers 27 and 28 and while clock pulse ϕ1 is in a fall state, addition is performed and its result is written to register A. At the same time, next column addresses are assigned.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10577878A JPS5533225A (en) | 1978-08-30 | 1978-08-30 | Arithmetic unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10577878A JPS5533225A (en) | 1978-08-30 | 1978-08-30 | Arithmetic unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5533225A true JPS5533225A (en) | 1980-03-08 |
Family
ID=14416604
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10577878A Pending JPS5533225A (en) | 1978-08-30 | 1978-08-30 | Arithmetic unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5533225A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4911017A (en) * | 1972-05-26 | 1974-01-31 | ||
JPS5295940A (en) * | 1976-02-09 | 1977-08-12 | Hitachi Ltd | Computer processing control |
-
1978
- 1978-08-30 JP JP10577878A patent/JPS5533225A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4911017A (en) * | 1972-05-26 | 1974-01-31 | ||
JPS5295940A (en) * | 1976-02-09 | 1977-08-12 | Hitachi Ltd | Computer processing control |
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