JPS5567988A - Data transfer system - Google Patents
Data transfer systemInfo
- Publication number
- JPS5567988A JPS5567988A JP13980178A JP13980178A JPS5567988A JP S5567988 A JPS5567988 A JP S5567988A JP 13980178 A JP13980178 A JP 13980178A JP 13980178 A JP13980178 A JP 13980178A JP S5567988 A JPS5567988 A JP S5567988A
- Authority
- JP
- Japan
- Prior art keywords
- data
- front half
- counter
- transfer
- latter half
- 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
- Memory System (AREA)
- Memory System Of A Hierarchy Structure (AREA)
Abstract
PURPOSE: To realize high-speed transfer of data to RAM by writing the latter half of data in RAM except its front half when the front half and latter half of transfer data are separated in a cyclic shift register.
CONSTITUTION: In accordance with count address (b), initial address (a) and data bit length (l) of counter A, register B and counter C, arithmetic processing circuit PV makes a decision on whether the relation shown by formula I is satisfied or not and when it is satisfied, it is judged that transfer data is divided into front half (d1) and latter half (d2) in cyclic shift register SR. Then circuit PV re-sets the bit length of counter C to bit length (l2) calculated by l2=l-(a-b). Consequently, latter half (d2) is written in RAM except the front half part of an accessed part without waiting appearance of the initial address of front half part (d1) at read terminal R of register SR, thereby realising high-speed data transfer.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13980178A JPS5567988A (en) | 1978-11-15 | 1978-11-15 | Data transfer system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13980178A JPS5567988A (en) | 1978-11-15 | 1978-11-15 | Data transfer system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5567988A true JPS5567988A (en) | 1980-05-22 |
Family
ID=15253740
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13980178A Pending JPS5567988A (en) | 1978-11-15 | 1978-11-15 | Data transfer system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5567988A (en) |
-
1978
- 1978-11-15 JP JP13980178A patent/JPS5567988A/en active Pending
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