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Thread: Netronics Explorer/85

  1. #51


    I finally got the EPROM programmer design updated to support 8755A chips. There is a new thread on it in the Tech Support goup here:

  2. #52


    It would seem that the programming is the same except the adapter card is different.
    in section 9.
    The only difference I see is that there is a Schottky diode, 1N5821, between Vcc and Vdd for the 8755A part.
    It would seem that a simple switch on the diode would handle the difference. It would seem that Vdd is to go to 0 volts between programming pulses for the 8755 while it is to go to 5V for the 8755A.
    Last edited by Dwight Elvey; May 17th, 2018 at 09:41 PM.


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