![]() The normal thing to do is to buy a programmer that works with the PC. Unfortunately the EPROM manufacturers don't always want to release the programming specifications, because they are protecting the programmer manufacturers' business. Another problem however is that not all EPROMs program the same way so you would have to get the specifications on the one you want to program, and make your circuit for that. ![]() ![]() That's what I did for my first one (in 1985), but it was so slow and so vulnerable to human error that it was almost worthless. If we give you an EPROM-programmer circuit, it will probably be 6502-controlled! (Actually then it would need an EPROM programmer for the 6502 as well though.) Seriously, if you don't already have a computer of some kind, the EPROM programmer would be completely hand-operated, that is, you set the address and data by hand using switches, then push a button which would give a timed programming pulse, and you do that for every single byte. ![]()
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