JPS55157054A - Disc cash unit - Google Patents
Disc cash unitInfo
- Publication number
- JPS55157054A JPS55157054A JP6544479A JP6544479A JPS55157054A JP S55157054 A JPS55157054 A JP S55157054A JP 6544479 A JP6544479 A JP 6544479A JP 6544479 A JP6544479 A JP 6544479A JP S55157054 A JPS55157054 A JP S55157054A
- Authority
- JP
- Japan
- Prior art keywords
- address
- block
- sector
- disc
- cash
- 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 make easy whether or not the accessed sector is present in the cash, by splitting the block of disc and cash memory into sets and performing mapping in the same set.
CONSTITUTION: The disc record designated with the readout instruction from CPU is stored in the address register 100, and set address is produced from a set address production circuit 200 to select, for example, the set 303 of the directory 300. The comparison circuit 700 compares the entry content of the directory to three levels of the set 303 with the address 110 of a register 100. The level address and the set address in agreement are delivered to a cash memory 500, a block 530 is designated, and a sector in the block 530 is selected with a sector address 104 and delivered to CPU. If not in agreement, a vacant block is retrieved from the set 303. If no vacant block is present, the block having lower frequency of usage is selected.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6544479A JPS55157054A (en) | 1979-05-25 | 1979-05-25 | Disc cash unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6544479A JPS55157054A (en) | 1979-05-25 | 1979-05-25 | Disc cash unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55157054A true JPS55157054A (en) | 1980-12-06 |
Family
ID=13287304
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6544479A Pending JPS55157054A (en) | 1979-05-25 | 1979-05-25 | Disc cash unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55157054A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5831460A (en) * | 1981-08-17 | 1983-02-24 | インタ−ナシヨナル・ビジネス・マシ−ンズ・コ−ポレ−シヨン | Addressing unit |
JPS58161060A (en) * | 1981-11-27 | 1983-09-24 | ストレ−ジ・テクノロジ−・コ−ポレ−シヨン | Suitable region dividing method for cash memory |
JPS59757A (en) * | 1982-06-26 | 1984-01-05 | Fujitsu Ltd | Dynamic allocation system of tracking buffer |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5040047A (en) * | 1973-08-14 | 1975-04-12 |
-
1979
- 1979-05-25 JP JP6544479A patent/JPS55157054A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5040047A (en) * | 1973-08-14 | 1975-04-12 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5831460A (en) * | 1981-08-17 | 1983-02-24 | インタ−ナシヨナル・ビジネス・マシ−ンズ・コ−ポレ−シヨン | Addressing unit |
JPH0247775B2 (en) * | 1981-08-17 | 1990-10-22 | Intaanashonaru Bijinesu Mashiinzu Corp | |
JPS58161060A (en) * | 1981-11-27 | 1983-09-24 | ストレ−ジ・テクノロジ−・コ−ポレ−シヨン | Suitable region dividing method for cash memory |
JPS59757A (en) * | 1982-06-26 | 1984-01-05 | Fujitsu Ltd | Dynamic allocation system of tracking buffer |
JPH0413733B2 (en) * | 1982-06-26 | 1992-03-10 | Fujitsu Ltd |
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