On 07/24/2016 01:42 PM, Segher Boessenkool wrote: > On Sun, Jul 24, 2016 at 12:58:36PM +0200, Gerrit Heitsch wrote: >>>> Depends... On the later Chips, MOS included a number to the right of the >>>> datecode. From what we've been able to determine, if it starts with a >>>> '1', the Chip is NMOS and if it starts with a '2', the chip is HMOS-II. >>>> The other numbers are the revision and match the R-number if it's >>>> present on the chip. I have a few 6510 from after 1986 that have a '16' >>>> printed there, so they would be NMOS which would suggest the 6510T also >>>> to be NMOS since it's from 1984. >>> >>> Great info, thanks! >> >> I looked through my collection and found a GARY (5719) where this number >> is a '42' and a BUSRTER (5721) with a '40', suggesting the '4' stands >> for CMOS. I also have a C64-ROM with a '31', but no idea what the '3' >> could mean. The '4510R3' from the C65 has a '53'... So what could the >> '5' mean? > > Some more info, from c64 chips... > > Some 6502AD are marked "1D". I assume that the D is hex and means '13'. So that would be a 6502 in NMOS Rev. 13. > Some roms are marked "01". I have Images of 6522 marked '03'. > All 1986 chips I found have no such marking, all 1987 chips do. So > somewhere around this was introduced. The oldest Chips with these markings are a pair of 6522 with a datecode of '4086'. They are marked '10'. The next oldest one is a 6502A marked '1D' with a datecode of '4486'. Gerrit Message was sent through the cbm-hackers mailing listReceived on 2016-07-24 13:00:02
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