Note that the Rockwell 65C102 is ALMOST like a 65C02, except that it uses an E
and Q clock scheme similar to what the 6809 uses. Consequently, it's not a
drop-in replacement for a 65C02. Like the Rockwell 65C02, it comes in versions
up to E_at_4 MHz. I've had excellent results with the E_at_4 MHz parts at harmonics
of the baud rates that operate the CPU at close to 5 MHz, e.g. 4.9152 or 5.0688
MHz.
Note also, that dirrerent versions of the CMOS parts have different instruction
sets, and that those all differ in a number of ways from the old NMOS 6502
instruction set.
Dick
----- Original Message -----
From: "Pete Turnbull" <pete_at_dunnington.u-net.com>
To: <classiccmp_at_classiccmp.org>
Sent: Sunday, October 07, 2001 11:55 AM
Subject: Re: 6502 Source....
> On Oct 7, 17:14, Alex White wrote:
> > Hey all UK people - do you know of a source for 6502s (and related
> support
> > chips, such as the 6522) within the UK?
>
> Farnell still list the CMD version, G65SC02, catalogue number 562-750, and
> the Rockwell R65C102, cat.no. 388-488, though the Rockwell parts is listed
> as "available until stocks are exhausted". They also list several
> varieties of 6520, 6521, and a 6545 (Rockwell version of 6845 CRT
> controller), but I know of no suppliers for new 6522s.
>
>
> --
> Pete Peter Turnbull
> Network Manager
> University of York
>
>
Received on Sun Oct 07 2001 - 13:57:40 BST