RE: [N8VEM-S100:1233] 6502 CPU "Production" S-100 boards

["John Monahan" <mon...@vitasoft.org>]

Interesting! I am currently using  4 MHz Oscillator (divided by 2) to give a
2 MHz CPU clock.  It is a 65C02A (so has extra instructions etc).  Next time
I'm doing a Mouser order I will try one of those out.  I see no reason
however why the board would not work at a higher speed as the layout is very
simple.

John


John Monahan Ph.D
e-mail: mon...@vitasoft.org
Text:    mon...@txt.att.net


-----Original Message-----
From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On
Behalf Of Paul Birkel
Sent: Friday, December 28, 2012 11:18 PM
To: n8vem...@googlegroups.com
Subject: [N8VEM-S100:1233] 6502 CPU ?Production? S-100 boards

John:  I see that Oscar Vermeulen on the NV8EM mail-list has uncovered the
fact that Mouser is now stocking a new 65C02 (technically:
W65C02S6TPG-14) from Western Design rated for 14 MHz:

http://www.mouser.com/ProductDetail/Western-Design-Center-WDC/W65C02S6TPG-14
/?qs=sGAEpiMZZMsk5yEqv3Bk8YK9LsvhE2jzAMrhJSt5cvk%3d

It's a standard PDIP-40 and $6.95 @.

What sort of clock frequency have you been using to test the prototype
board?  Maybe this will help you goose it a bit further?

On Sat, Dec 22, 2012 at 1:01 PM, John Monahan <mon...@vitasoft.org> wrote:
> Andrew since it may be some time before we get enough interest for a 
> full twenty 6502 CPU ?Production?  S-100 boards could you get me 3 
> more ?prototypes? (i.e. Advanced Circuit) boards. I want to flush out 
> some to the holdovers I have here as ?patched? boards for the year. 
> Leon if I remember may use one as well. If that?s all the is he can have
one of my 3.
>
> John