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Commodore 128 Garbage Screen & Random Memory Problem repair

February 23rd, 2016 Leave a comment Go to comments
Commodore 128 Garbage Screen & Random Memory Problem repair

Commodore 128 Garbage Screen & Random Memory Problem repair

Defect:

  • Garbage Screen in 128 mode and Random Memory problems in 64 mode.

Repair:

  • Replaced the MOS 8502 CPU.

Note:

  • The problem of the Garbage Screen / Out of Memory / Memory problems of the Commodore 128 is not always a problem of Ram / Multiplexer or Bank Switching.

Gallery of the repair:

Categories: Projects / Repairs, Today, Various
  1. Paul H
    March 18th, 2016 at 20:40 | #1
    Reply | Quote

    I notice in the 128 mode the photos show two different fonts. Looks like a PET font and the C64 font.

    Noobish question but is that normal?

    Thanks

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