Calab Posted July 1, 2021 Share Posted July 1, 2021 I have a 1571 floppy drive that is having issues. I've narrowed it down to some of the larger IC's, which are hard to obtain. Does anyone know if this WD part from Mouser will replace the 6502 in the 1571? Any idea if it would work in the C64, etc.? Mouser 65C02 Quote Link to comment Share on other sites More sharing options...
carlsson Posted July 1, 2021 Share Posted July 1, 2021 Just today I read something about a 65C02 to 6502 adapter for use in VIC-20. To be honest I thought they were pin compatible, so I can't say for sure. The C version lacks illegal op-codes but most of the time the 1571 built-in software wouldn't rely on it. Perhaps some custom fastloaders do, in particular from demo groups? The C64 has a 6510 which is a 6502 plus an I/O port so a 6502 or 65C02 is not a direct replacement. There may be solutions to replace it as well, by adding the I/O port to an adapter board but I've never digged into it. Software wise the two MOS chips are the same, just not hardware. 1 Quote Link to comment Share on other sites More sharing options...
carlsson Posted July 1, 2021 Share Posted July 1, 2021 Quote Link to comment Share on other sites More sharing options...
+OLD CS1 Posted July 4, 2021 Share Posted July 4, 2021 He uses a W65C02S to replace the 6502. Quote Link to comment Share on other sites More sharing options...
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