Re: A Simple Programmer for TESLA "MH74S-" bipolar PROMs
I have recently been programming some DM74S287 and some N82S129 types for my SOL-20. I can do these on my BP1400 programmer. With these types there is some partial programming compatibility but not exact, I had the programmer accidentally set for the DM74S287 and it partially programmed a N82S129 with some correct bytes before detecting an error and stopping as one example.
I bought a MH74S287 to try. I can confirm that it will not program with the DM74S287 programming protocol.
I have also been programming some vintage MM5204 UVeproms, for these I use the Martin Eberhard programmer it use the P+5P smart over-programming protocol.
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