Hello, My VC-1541 (an early one with cream case) has a SY6502, and judging from the production dates, I presume it's an original installation. I bought the drive from original owner, and he never mentioned anything about repairs. Never had any problems with any software. I don't know, if any software uses undefined op-codes on 1541. -Miika didier derny [email@example.com] kirjoitti: > HI, > > the synertek components are known to be bugged. > that's why we only used mos technology or rockwell. > > the 6522 and the 6551 where badly bugged > but I never heard of this specific bug.... > > I dont know if these bugs were ever fixed. > > -- > didier > > Le 11/04/2012 00:42, Rob Clarke a écrit : > > Hello gentlemen, > > > > Does anyone know if the Synertek 6502 is 100% compatible with its MOS > > cousin? I have one which I tried in an otherwise working PET and I get > > "31653.4784 BYTES FREE" instead of 31743, which is 89.5216 bytes short > > :-/ > > > > I know some of the later CMOS incarnations did not have the same > > behaviour with undefined op-codes but a) this a 1984 chip and b) I > > can't believe the PET kernal would use them anyway. > > > > It is also possible that this chip is just duff of course. > > > > Rob > > > > > > Message was sent through the cbm-hackers mailing list > > > Message was sent through the cbm-hackers mailing list > Message was sent through the cbm-hackers mailing listReceived on 2012-04-11 10:00:06
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