JPS5566041A - Extension system of storage capacity - Google Patents
Extension system of storage capacityInfo
- Publication number
- JPS5566041A JPS5566041A JP13788478A JP13788478A JPS5566041A JP S5566041 A JPS5566041 A JP S5566041A JP 13788478 A JP13788478 A JP 13788478A JP 13788478 A JP13788478 A JP 13788478A JP S5566041 A JPS5566041 A JP S5566041A
- Authority
- JP
- Japan
- Prior art keywords
- capacity
- storage device
- storage capacity
- bus
- instructions
- 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 extend a storage capacity without damaging a high-speed property by connecting an internal storage device and an extension storage device to the same memory bus line and selecting information communication between the extension storage device and a processing unit with I/O instructions.
CONSTITUTION: This system is constituted by processing unit 1 which transmits or receives information to or from internal storage device of a storage capacity of n-number words connected to memory bus line 7, extension storage device blocks E1WEi5 of a storage capacity of m-number words connected to the same bus 7, and block selection circuit 9 which generates signals to select blocks E1WEi. The total sum of capacity n of device 3 and capacity m per one block of device 5 is set to a value below the maximum storage capacity which can be designated directly by bus 7 of unit 1. In respect to a program to select blocks of device 5, I/O instructions or instructions corresponding to them are stored in device 3 previously and are given to circuit 6 through I/O interface bus line 6. One of selection signal lines 8 is selected by circuit 6, and one block of device 5 is connected to bus 7, thereby extending the memory capacity.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13788478A JPS5566041A (en) | 1978-11-10 | 1978-11-10 | Extension system of storage capacity |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13788478A JPS5566041A (en) | 1978-11-10 | 1978-11-10 | Extension system of storage capacity |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5566041A true JPS5566041A (en) | 1980-05-19 |
Family
ID=15208928
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13788478A Pending JPS5566041A (en) | 1978-11-10 | 1978-11-10 | Extension system of storage capacity |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5566041A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55164955A (en) * | 1979-05-09 | 1980-12-23 | Nec Corp | Information processor |
-
1978
- 1978-11-10 JP JP13788478A patent/JPS5566041A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55164955A (en) * | 1979-05-09 | 1980-12-23 | Nec Corp | Information processor |
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