JPS6450276A - Disk controller - Google Patents
Disk controllerInfo
- Publication number
- JPS6450276A JPS6450276A JP20748687A JP20748687A JPS6450276A JP S6450276 A JPS6450276 A JP S6450276A JP 20748687 A JP20748687 A JP 20748687A JP 20748687 A JP20748687 A JP 20748687A JP S6450276 A JPS6450276 A JP S6450276A
- Authority
- JP
- Japan
- Prior art keywords
- floppy disk
- controller
- host system
- switching
- necessitating
- 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
Abstract
PURPOSE:To realize control without necessitating the change of software of a host system consisting of a RAM disk (RD) device or a storage device of combination type of a floppy disk (FD) and the RAM disk, by switching a controller circuit. CONSTITUTION:The titled device is constituted in such a way that first and second multiplexers 4 and 8, and first, second, and third de-multiplexers 6, 5 and 7 are switched by a switching control signal, and switching of the usage of an FD controller circuit 1 or that of an RD controller 2 can be performed, and it is connectable to both the RAM disk device and the floppy disk device, and is capable of controlling then. Also, by using the same physical interface on the storage device side as that of a conventional device, a conventional floppy disk device can be connected as it is. Furthermore, by using the same physical and logical interface on a host system side as that of the conventional system, a floppy disk controller can be replaced by a conventional floppy disk controller as it is, thereby, the control can be performed without necessitating the change of the software of the host system.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20748687A JPH07109692B2 (en) | 1987-08-21 | 1987-08-21 | Disk controller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20748687A JPH07109692B2 (en) | 1987-08-21 | 1987-08-21 | Disk controller |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6450276A true JPS6450276A (en) | 1989-02-27 |
JPH07109692B2 JPH07109692B2 (en) | 1995-11-22 |
Family
ID=16540534
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20748687A Expired - Lifetime JPH07109692B2 (en) | 1987-08-21 | 1987-08-21 | Disk controller |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH07109692B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6014726A (en) * | 1995-12-15 | 2000-01-11 | Fujitsu Limited | Storage apparatus adapted to interface with a host apparatus for processing two different types of recording media |
-
1987
- 1987-08-21 JP JP20748687A patent/JPH07109692B2/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6014726A (en) * | 1995-12-15 | 2000-01-11 | Fujitsu Limited | Storage apparatus adapted to interface with a host apparatus for processing two different types of recording media |
Also Published As
Publication number | Publication date |
---|---|
JPH07109692B2 (en) | 1995-11-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term | ||
FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20071122 Year of fee payment: 12 |