CMOS 6502 variants (was Re: z80 timing... 6502 timing)

From: Eric Smith <eric_at_brouhaha.com>
Date: Sun Apr 18 16:45:29 1999

I wrote:
> Commodore also designed a CMOS 6502 core, but AFAIK it was never actually
> marketed as a 65C02.

Cameron replied:
> Tell me more about this. To the best of my knowledge, Commodore only ever
> used NMOS (65xx), HMOS-1 (75xx) and HMOS-2 (85xx) in their computers *save*
> the 65, which used the 4510 (modified 65CE02 with two onboard 6526s). HMOS
> was, for its part, just a high-speed NMOS manufacturing process (hence H).

I received a data sheet from them many years ago, which I no longer have.
I don't recall the part number they were using. Perhaps I spoke to strongly
when I said that they designed it; it may be that they only wrote a data
sheet in order to guage customer interest. That was before they essentially
stopped selling their chips on the open market.
Received on Sun Apr 18 1999 - 16:45:29 BST