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Non-Volatile High-Speed Electronic Storage for the IBM Personal Computer

IP.com Disclosure Number: IPCOM000059655D
Original Publication Date: 1986-Jan-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 70K

Publishing Venue

IBM

Related People

Johnson, LA: AUTHOR

Abstract

A technique is described whereby an electronically erasable programmable read-only memory (EEPROM) array and control circuitry is incorporated into the circuitry of the IBM Personal Computer (PC), so as to provide non-volatile electronic storage of information in place of or in addition to various types of storage, such as diskettes or magnetic tape. With the advent of low cost EEPROMs, such as the 256K or 512K byte EEPROM, control circuitry and the implementation of the EEPROM, as described herein, enables the personal computer to store and erase data electronically. By incorporating either 256K or 512K byte EEPROMs, a total of up to 2.04 megabytes of non-volatile storage is obtained without increasing power supply requirements.

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Non-Volatile High-Speed Electronic Storage for the IBM Personal Computer

A technique is described whereby an electronically erasable programmable read-only memory (EEPROM) array and control circuitry is incorporated into the circuitry of the IBM Personal Computer (PC), so as to provide non-volatile electronic storage of information in place of or in addition to various types of storage, such as diskettes or magnetic tape. With the advent of low cost EEPROMs, such as the 256K or 512K byte EEPROM, control circuitry and the implementation of the EEPROM, as described herein, enables the personal computer to store and erase data electronically. By incorporating either 256K or 512K byte EEPROMs, a total of up to 2.04 megabytes of non-volatile storage is obtained without increasing power supply requirements. Although the technique described herein incorporates the EEPROMs as an integral part of the PC, the concept extends the application of the EEPROMs to a pluggable entity, such as an external cartridge, diskette or pluggable card. Current technology enables the non-volatile EEPROMs to store data for ten years or more. The control circuitry block diagram for a 1.02 megabyte EEPROM, as shown in the figure, is compatible for operation with the system circuitry of all versions of the IBM Personal Computers, from the portable to the AT. The control circuitry is connected to the PC at system address bus 10. Address decode unit 11 decodes the address, so as to obtain auto-lo...