EPROM copier - universal EPROM duplicator and verifier

EPROM copier elektor may 1984 from an idea by R. Hasse EPROMs with various memory capacities and/or from different manufacturers are not standardized as regards pin designations, programming voltage, and programming algorithm. The purpose of the circuit proposed here is to enable all the most commonly used EPROMs (from 16 Kbit . . . 128 Kbit) to be copied by the same universal circuit. The user need only specify the type of EPROM to be copied and the circuit automatically takes care of the pin designations, the programming voltage, and the control signals needed by the EPROM EPROM copier universal EPROM duplicator and verifier Programming or duplicating EPROMs is not, in itself, such a complicated pro- cedure. A programming voltage is needed (21 V or 25 V) but apart from that it is simply a matter of providing the right ad- dresses, data, and control signals to the EPROM in question. Any method of automation that can speed up the pro- gramming process is welcomed, of course. Autom...