Technical questions about any Commodore computer, peripheral, or related issue.
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Recently I reported on the replacement of a damaged ROM in a CBM 710 computer. That project ended in success. Now I have two 4040 disk drives with problems. One of them works partially. One drive out of the dual drives works. The other 4040 doesn't work at all. It gives a flash code. According to the information I've been able to get, the problem seems to be one or more of the DOS ROMS. I ordered some EPROMS which I'm waiting for. Hopefully my experimentation with EPROMs will help someone on this forum.