JPS5621222A - Memory extension system - Google Patents
Memory extension systemInfo
- Publication number
- JPS5621222A JPS5621222A JP9671579A JP9671579A JPS5621222A JP S5621222 A JPS5621222 A JP S5621222A JP 9671579 A JP9671579 A JP 9671579A JP 9671579 A JP9671579 A JP 9671579A JP S5621222 A JPS5621222 A JP S5621222A
- Authority
- JP
- Japan
- Prior art keywords
- memory
- ram5
- dma transfer
- dma
- data transfer
- 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
- Bus Control (AREA)
Abstract
PURPOSE: To enable high speed processing, by executing the data transfer by DMA transfer system, between RAMs for main memory and auxiliary use.
CONSTITUTION: The CPU1 is connected to the main memory 2 and DMA controller 3 via the data bus DB and the address bus AB. The memory 2 performs data transfer of DMA transfer system with RAM5 being the auxiliary memory under the control of the controller 3. The head address and number of transferred words performing DMA transfer of RAM5 is preset at DMA transfer by CPU1. The data transfer between the memory 1 and RAM5 is possible for the execution, by changing the program input by CPU, between an arbitrary area of RAM and the memory, then high speed processing is enabled and the extension of memory capacity can simply be made.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9671579A JPS5621222A (en) | 1979-07-31 | 1979-07-31 | Memory extension system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9671579A JPS5621222A (en) | 1979-07-31 | 1979-07-31 | Memory extension system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5621222A true JPS5621222A (en) | 1981-02-27 |
Family
ID=14172434
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9671579A Pending JPS5621222A (en) | 1979-07-31 | 1979-07-31 | Memory extension system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5621222A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59116830A (en) * | 1982-12-24 | 1984-07-05 | Hitachi Micro Comput Eng Ltd | Microcomputer system |
JPS59139428A (en) * | 1982-12-28 | 1984-08-10 | Fujitsu Ltd | Direct memory access system |
JPS59167761A (en) * | 1983-03-14 | 1984-09-21 | Hitachi Ltd | Computer system |
JPS63113653A (en) * | 1986-10-30 | 1988-05-18 | Hitachi Ltd | Semiconductor memory controller |
-
1979
- 1979-07-31 JP JP9671579A patent/JPS5621222A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59116830A (en) * | 1982-12-24 | 1984-07-05 | Hitachi Micro Comput Eng Ltd | Microcomputer system |
JPS59139428A (en) * | 1982-12-28 | 1984-08-10 | Fujitsu Ltd | Direct memory access system |
JPS59167761A (en) * | 1983-03-14 | 1984-09-21 | Hitachi Ltd | Computer system |
JPH0340868B2 (en) * | 1983-03-14 | 1991-06-20 | ||
JPS63113653A (en) * | 1986-10-30 | 1988-05-18 | Hitachi Ltd | Semiconductor memory controller |
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