EPROM typically is burned out-of-circuit in a programming fixture. When the time comes to erase the EPROM, just pop it under an ultraviolet (UV) bulb for 30 minutes, and you’re ready to go again.

R4, D1, C9 and one gate of IC4 produce the power-on reset pulse for IC3, IC5 and IC6. SW1 allows the circuit to be reset again as required. The pinouts of the four EPROM types handled by this unit ...

An EPROM chip can easily generate repeating patterns when driven by a counter at a known ... but in the end, the circuit did its job, displaying a fixed image on a VGA monitor. If you haven’t ...

This EPROM Emulator was designed to compliment the EPROM Programmer (Mark 2). The unit presented here will emulate the standard 27 family of devices, from 2764 to 27512, and can ...

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