JPS55157048A - Address output circuit - Google Patents
Address output circuitInfo
- Publication number
- JPS55157048A JPS55157048A JP6539479A JP6539479A JPS55157048A JP S55157048 A JPS55157048 A JP S55157048A JP 6539479 A JP6539479 A JP 6539479A JP 6539479 A JP6539479 A JP 6539479A JP S55157048 A JPS55157048 A JP S55157048A
- Authority
- JP
- Japan
- Prior art keywords
- bits
- address
- output
- bus
- same
- 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)
- Microcomputers (AREA)
Abstract
PURPOSE: To enable efficient accessing, by outputting only the lower rank bit group if the uupper rank bit group is the same, by outputting the address from the same address terminal in time sharing after splitting it into the lower n bits and upper i bits.
CONSTITUTION: The address is divided into i bits (AD1) and n bits (AD2) and output externally. If there is the address of (n+i) bits in the internal address B1, the part AD1 enters the bus B2 (i bits) and inputs to the comparator 1. On the other hand, the part Ad1 is already written in for the address accessed before the first preceding in the register 2 and this is always input to the bus B3 (i bits) and compared 1. That is, the part AD1 of the address newly to be accessed and the part AD1 old which is output from the register 2 to the bus 3B are compared 1, and if not in agreement, the signal C1 is ON, but if in agreement, C1 remains OFF. That is, if the part AD1 is the same as the first preceding AD1, the part AD2 only is output and AD2 is not output, allowing to increase the access efficiency.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6539479A JPS55157048A (en) | 1979-05-25 | 1979-05-25 | Address output circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6539479A JPS55157048A (en) | 1979-05-25 | 1979-05-25 | Address output circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55157048A true JPS55157048A (en) | 1980-12-06 |
Family
ID=13285738
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6539479A Pending JPS55157048A (en) | 1979-05-25 | 1979-05-25 | Address output circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55157048A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5774861U (en) * | 1980-10-28 | 1982-05-08 | ||
JPS61216067A (en) * | 1985-02-18 | 1986-09-25 | Fujitsu Ltd | Address coding system |
JPS62128351A (en) * | 1985-11-29 | 1987-06-10 | Yokogawa Medical Syst Ltd | Data transfer equipment |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50115941A (en) * | 1974-02-25 | 1975-09-10 | ||
JPS50125646A (en) * | 1974-03-20 | 1975-10-02 | ||
JPS5274240A (en) * | 1975-12-18 | 1977-06-22 | Hitachi Ltd | Lsi data processing system |
JPS54119848A (en) * | 1978-03-09 | 1979-09-18 | Fujitsu Ltd | Sectioning and informing system for address information |
-
1979
- 1979-05-25 JP JP6539479A patent/JPS55157048A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50115941A (en) * | 1974-02-25 | 1975-09-10 | ||
JPS50125646A (en) * | 1974-03-20 | 1975-10-02 | ||
JPS5274240A (en) * | 1975-12-18 | 1977-06-22 | Hitachi Ltd | Lsi data processing system |
JPS54119848A (en) * | 1978-03-09 | 1979-09-18 | Fujitsu Ltd | Sectioning and informing system for address information |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5774861U (en) * | 1980-10-28 | 1982-05-08 | ||
JPS624043Y2 (en) * | 1980-10-28 | 1987-01-29 | ||
JPS61216067A (en) * | 1985-02-18 | 1986-09-25 | Fujitsu Ltd | Address coding system |
JPS62128351A (en) * | 1985-11-29 | 1987-06-10 | Yokogawa Medical Syst Ltd | Data transfer equipment |
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