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Type: Posts; User: Koolstar42

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  1. https://museo.freaknet.org/gallery/apple/stuff/mac...

    https://museo.freaknet.org/gallery/apple/stuff/mac/andreas.kann/schemat.html
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    The monitor is run when a trap interrupt is...

    The monitor is run when a trap interrupt is generated due to a program overrun.
    The message Trap! will appear on the second line of the screen, below the command prompt.

    The HX20 will enter the...
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    Solder isn't old it is corroded by the E-cap...

    Solder isn't old it is corroded by the E-cap electrolyte. it no longer melts using a soldering iron. It needs to be removed physically, as does the corrosion of the copper pads. I had one via which...
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    I'm pretty sure that does not work, as I wired...

    I'm pretty sure that does not work, as I wired #WE to VCC to keep routing as lean as possible. I just program the ROMs separately. It is a one time only affair, so making the SIM programmable...
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    It's not that hard, just very tedious. I used...

    It's not that hard, just very tedious.
    I used the IDA free dis-assembler. You just look at the code, start at the beginning F000:FFF0 and follow along. Name parts you (think) you recognize and keep...
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    Thanks for the tip. I did not have a hot air...

    Thanks for the tip. I did not have a hot air tool, now I do. Ill give it a try
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    ROMSIMM for Macintosh SE/30

    I am the proud owner of a Macintosh SE/30 and I wanted to experiment with a 32bit 'clean' ROM. So I decided to design my own pcb. After some soldering woes I got it to work, but as per usual, I now...
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    Zenith sopersPORT 8085 adventures

    I recently acquired a Zenith supersPORT ZWL-184-02 in a non-working condition. It would not power on and the plastic was broken in several places. To fix the electronics I replaced the fuse (duh) and...
  9. Zenith supersPORT ZWL-184-02 ROM BIOS code wanted

    Hi All,

    I am am the happy owner of the above system. I fixed the broken plastic parts, repaired the electronics and it seems to be in good working order. However it has a custom ROM called "ACCESS...
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