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  1. chrisrueckert

    New Video ROM for SE/30

    I followed the instructions found here to program a new video ROM: https://tinkerdifferent.com/threads/this-is-what-a-bad-macintosh-se-30-video-rom-looks-like.1446/ To create a new video ROM, I used a GQ-4x4 to program the AT28C64. Then I compared the original video ROM file with the one on the...
  2. chrisrueckert

    Macintosh Plus 68020 Accelerator Card?

    I have this 12MHz 68020 accelerator card on a Mac Plus logic board. Does anyone know what model/brand it is and where I could find the manual for it?
  3. chrisrueckert

    Sad Mac Error Code Decoding - Identification of Bad RAM?

    So my Portable was re-capped and now boots with this sad Mac error: 00000003 0000FF00 Following the instructions in this thread I followed the diagnostics checks by connecting the Portable's modem port to another Mac and ran Zterm with the following commands and results in an attempt to...
  4. chrisrueckert

    Classic II C6 Cap: To where does the "+"-pad connect to?

    The + pad of the C6 capacitor came off. I checked the logic board schematics and noticed it would connect to a resistor. However, that resistor does not have a lable. Does anyone know where the pad would connect to?
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