From the comments: EPROM Programmer

Chuck shares his experience programming 1702 EPROMs for the 8008 with an Pro-Log M900 EPROM Programmer:

I thought I’d share a little known thing about [the 1702 EPROM]. When you erase most eproms they go to FF and the the process of programming discharges the bits that you want to be ’0′ The 1702 worked backwards. Erasing it set the internal bits to 0 then programming it consisted of charging the bits you wanted to be 1. I know this from the first company I worked at as a programmer. The processor we used was the 8008 and the eprom was 1720s. We used KSR33 teletypes with the paper tape punch to produce something that the prolog m900 programmer could read.

Intel 8008 board.

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2 Comments

  1. I’m still saving up for a good eprom programmer after attempting to use 2 x Willems and getting no where, I think im going to have to spend some serious money :D

  2. I like to buy a M900 programer with the personality modules PM9059 and PM9067 with the
    PA16-1 and the PA20-10 pinout adapters. I need to program some fuselink proms from Signetics and TI
    like the TBP28L22 and the 82S129.
    If you are selling these parts, please let me know.
    Sincerely, Ueli Jucker

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