Browse Prior Art Database

EPROM Programming Device

IP.com Disclosure Number: IPCOM000038708D
Original Publication Date: 1987-Feb-01
Included in the Prior Art Database: 2005-Jan-31
Document File: 2 page(s) / 54K

Publishing Venue

IBM

Related People

Maringo, RJ: AUTHOR [+2]

Abstract

This article relates generally to personal computer programming and, more particularly, to apparatus for altering a variety of electrically programmable read-only memories (EPROMs). The addition of an adapter and circuit card externally of a personal computer enables more convenient verification and alteration of EPROMs, and adaptation to different techniques. Referring to the figure, data and control lines are brought via cable connector 1 to an EPROM socket 2 at the rear of a personal computer. An EPROM can thus be mounted on the personal computer without the need of cover removal. In operation, proper line connections are insured by transmitting a wrap bit from internal register 3 to register 4 along a path including opposite ends of connector 1.

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EPROM Programming Device

This article relates generally to personal computer programming and, more particularly, to apparatus for altering a variety of electrically programmable read- only memories (EPROMs). The addition of an adapter and circuit card externally of a personal computer enables more convenient verification and alteration of EPROMs, and adaptation to different techniques. Referring to the figure, data and control lines are brought via cable connector 1 to an EPROM socket 2 at the rear of a personal computer. An EPROM can thus be mounted on the personal computer without the need of cover removal. In operation, proper line connections are insured by transmitting a wrap bit from internal register 3 to register 4 along a path including opposite ends of connector 1. Operations such as reading the EPROM contents, insuring erasure and writing can be performed. EPROM address values are placed in registers 5 and 6 and data bits in register
7. Proper programming voltages and pulse signals are controlled through register
3. As each byte is programmed, the program pulse is removed and the EPROM is placed in a read mode; the programming results are then read back to the personal computer via register 8 and compared. The program continues in this manner to completion, retries or display of error information. High voltage generator 9 provides the voltage necessary to program the EPROMs and resides on an internal circuit card, eliminating the need for an external p...