68kMLA Classic Interface

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Colour Classic processor pinout
Posted by: carian on 2026-02-16 06:47:34
Hi,
I have a Colour Classic with broken logic board. Seems CPU pin number 84 has a missing pad. Can somebody tell me where it goes?
Thank you.
Posted by: Phipli on 2026-02-16 07:15:26
Hi,
I have a Colour Classic with broken logic board. Seems CPU pin number 84 has a missing pad. Can somebody tell me where it goes?
Thank you.
I might be wrong... But looking at the related LC II schematics, I don't think it is connected to anything.

The pads that don't go anywhere are the most prone to failing because they're not held there by a trace.
Posted by: carian on 2026-02-16 07:25:47
I might be wrong... But looking at the related LC II schematics, I don't think it is connected to anything.

The pads that don't go anywhere are the most prone to failing because they're not held there by a trace.
Looking at my other logic board in working condition, I couldn't see where it goes and I suspected whether it is connected anywhere. Thank you.
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