Semiconductor memory configured to emulate floppy and hard disk

Details Semiconductor memory configured to emulate floppy and hard disk Semiconductor memory configured to emulate floppy and hard disk

1990-04-24

1993-07-06

Lee, Thomas C.

Boots, shoes, and leggings

395500, 3642323, 3642362, 364249, 3642802, 364DIG1, 36492781, 3649521, 364954, 3649752, G06F 1314, G06F 1210

Patent

active

052261689

ABSTRACT:
A compact, low power consumption, light weight, highly reliable and high speed information processing system is provided by employing a semiconductor auxiliary storage device in lieu of conventional magnetic storage or memory elements, such as floppy or hard disks. An access request to such a magnetic storage or memory element is converted to an access request for the semiconductor auxiliary storage which uses semiconductor integrated circuits without requiring any modification of existing programs, such as, application software and disk operating systems. A memory circuit in the semiconductor auxiliary storage comprises ROM and RAM, and a portion of the ROM contents is copied into the RAM so that access modification for programs and data is permitted while the basic program and data is retained in a nonvolatile manner.

REFERENCES:
patent: 4456971 (1984-06-01), Fukuda et al.
patent: 4896262 (1990-01-01), Wayama et al.
patent: 4984149 (1991-01-01), Iwashita et al.
patent: 5062042 (1991-10-01), Binkley et al.
"Personal Computer Network Attachment Arrangement Using a Diskette Adapter," IBM Technical Disclosure Bulletin, vol. 31 No. 5, Oct. 1988, pp. 52-58.
Paul Horowitz et al., "Software Interrupts" (Direct Memory Access/Bus Signals and Interfacing/Microcomputers), The Art of Electronics, p. 701, 1989 (2nd Ed.) Cambridge University Press.

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