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    daver2

    Just for the avoidance of doubt, /IRQ is active...

    Just for the avoidance of doubt, /IRQ is active when the signal is LOW.

    If your logic probe is indicating HIGH, how do you know whether the signal is inactive (permanently HIGH) or has a > X Hz...

    daver2 Today, 07:59 AM Go to last post
    SkyCaptain

    Hi Darver2 IRQ on Pin 4 of the 6502 is active...

    Hi Darver2 IRQ on Pin 4 of the 6502 is active according to my logic probe. It indicated "high" which should mean a pulse higher than 50hz is i remember correctly.

    Dave_m, So i guess my logic...

    SkyCaptain Today, 07:48 AM Go to last post
    MennoJoshua

    Has a valid checksum now: 8530 ROM from...

    Has a valid checksum now:

    8530 ROM from 68X1687 and 68X1627: Size: 64kB Start: F000:E05B Date: 09/02/86 8525/8530
    8530 ROM from 61X8938 and 61X8937: Size: 64kB Start: F000:E05B Date:...

    MennoJoshua Today, 07:00 AM Go to last post
    VERAULT

    Gary C I was quite impress flying over Britain...

    Gary C I was quite impress flying over Britain and seeing that giant square of wind turbines in the ocean. I guess others felt the same way as they installed some next to Block Island here in the...

    VERAULT Today, 06:39 AM Go to last post
    gertk

    With some effort (the ROM seems to be soldered...

    With some effort (the ROM seems to be soldered into place) that could be possible.
    I can not read out the rom from the kaypro as I only connected the IO lines needed to access the controller part of...

    gertk Today, 06:13 AM Go to last post