7 Oct
2001
7 Oct
'01
6:57 a.m.
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@4 MHz. I've had excellent results with the E@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(a)dunnington.u-net.com>
To: <classiccmp(a)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