paulk
Windows User
Posts: 1
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Post by paulk on May 12, 2019 20:54:22 GMT
Hello I picked up a c128 with 1571 and monitor. I had no way to test but price was right so I took a gamble and looks like everything works except keyboard, more specific few keys generate different code ( char ) then label on them. Problematic keys are 3 - does nothing or put 5 or 9 4 - move cursor one position to left W - does nothing or 0 or R , 8 E - put SCNCLR and clear screen SHIFT LOCK - repeatly put RUN and RETURN A - RETURN S - does nothing or 4 or : or K Z - put MONITOR left SHIFT - RUN and RETURN
In C64 mode and C/PM those keys also generate wrong characters but different then c128 No visible damage to mainboard, checked keyboard cable passed continuity test Other keys are OK
Any suggestion? Paul
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Post by willymanilly on May 12, 2019 22:14:33 GMT
Sounds like a bad row in your keyboard matrix. Referring to the following page in the Commodore c64 service manual, all the keys you are having problems with are in the 2nd row from the top of the matrix
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