A tricky Commodore PET repair: tracking down 6 1/2 bad chips
SMRTR summary
The Commodore PET, an early home computer from 1977, was repaired after extensive troubleshooting. Using modern tools, six faulty chips were identified - two ROMs and four RAMs. The repair involved replacing ROMs with adapter boards and EPROMs, and rearranging working RAM chips. After resolving issues with incorrectly programmed replacement ROMs, the PET was restored to working condition, though with reduced memory.
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