JPS55157056A - Disc cash control system - Google Patents
Disc cash control systemInfo
- Publication number
- JPS55157056A JPS55157056A JP6544879A JP6544879A JPS55157056A JP S55157056 A JPS55157056 A JP S55157056A JP 6544879 A JP6544879 A JP 6544879A JP 6544879 A JP6544879 A JP 6544879A JP S55157056 A JPS55157056 A JP S55157056A
- Authority
- JP
- Japan
- Prior art keywords
- data
- cash
- disc
- block
- unit
- 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.)
- Granted
Links
Landscapes
- Memory System Of A Hierarchy Structure (AREA)
Abstract
PURPOSE: To increase the cash hit rate, by increasing the unit read in the data from the disc unit to the cash memory according to the data length, when the data sequentially accessed is absent in the cash.
CONSTITUTION: A disc cash control unit 400 interprets the readout/write-in instruction of a disc output from a CPU 3,000 to check whether or not the accessed data is present in a cash memory 500. If present, the control unit 400 accesses the data required for the cash memory 500. If absent, the block including the data is read out from the disc unit 2,000, and the accessed data is given to the CPU 3,000 and this block is stored in the cash memory 500. If no vacant block is present, a suitable block low in the frequency of reference is selected.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6544879A JPS55157056A (en) | 1979-05-25 | 1979-05-25 | Disc cash control system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6544879A JPS55157056A (en) | 1979-05-25 | 1979-05-25 | Disc cash control system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55157056A true JPS55157056A (en) | 1980-12-06 |
JPS6331808B2 JPS6331808B2 (en) | 1988-06-27 |
Family
ID=13287422
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6544879A Granted JPS55157056A (en) | 1979-05-25 | 1979-05-25 | Disc cash control system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55157056A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57209555A (en) * | 1981-06-05 | 1982-12-22 | Ibm | Data processing system |
JPS57211657A (en) * | 1981-06-05 | 1982-12-25 | Ibm | Data processing system |
JPS62137786A (en) * | 1985-12-09 | 1987-06-20 | Matsushita Electric Ind Co Ltd | Storage device |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4952935A (en) * | 1972-07-03 | 1974-05-23 | ||
JPS5133608A (en) * | 1974-09-17 | 1976-03-22 | Hitachi Ltd |
-
1979
- 1979-05-25 JP JP6544879A patent/JPS55157056A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4952935A (en) * | 1972-07-03 | 1974-05-23 | ||
JPS5133608A (en) * | 1974-09-17 | 1976-03-22 | Hitachi Ltd |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57209555A (en) * | 1981-06-05 | 1982-12-22 | Ibm | Data processing system |
JPS57211657A (en) * | 1981-06-05 | 1982-12-25 | Ibm | Data processing system |
JPH0241056B2 (en) * | 1981-06-05 | 1990-09-14 | Intaanashonaru Bijinesu Mashiinzu Corp | |
JPH0241054B2 (en) * | 1981-06-05 | 1990-09-14 | Intaanashonaru Bijinesu Mashiinzu Corp | |
JPS62137786A (en) * | 1985-12-09 | 1987-06-20 | Matsushita Electric Ind Co Ltd | Storage device |
Also Published As
Publication number | Publication date |
---|---|
JPS6331808B2 (en) | 1988-06-27 |
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