Date   : Fri, 07 May 2004 09:59:17 +0200
From   : "Eelco Huininga" <e.huininga@...>
Subject: Betr.: 65c02

I've upgraded my model B issue 7 and as I recall there were some timing p
roblems, perticulary concerning the video controller. This was overcome b
y soldering two small capacitors on the mainboard.
Yesterday I took a look inside the B. I'm using a Rockwell R65C02P2 and h
ave soldered two 47pF ceramic capacitors accross legs 7 and 11 of IC29 an
d legs 7 and 11 of IC37. I'm not sure if the 47p value is correct since t
he stamp has faded and is hardly readable. If anyone needs to know the ex
act value, I could desolder them and plug them into my DVM to find out if
 the 47p value is correct. Just let me know.

One other problem I've come accross is a timing problem with my Solidisk
32k+96k SWR upgrade. It seems the 96k has a problem refreshing it's DRAM
contents. The 32k board is working perfectly, so I guess Solidisk used DR
AM's from different manufacturers. I haven't come accross a solution for
this problem yet. Maybe one day I'll bring out the good 'ol oscilloscope
and try to pinpoint the problem...

Hope this helps some of you guys...


Cheers,
Eelco




>>> gARetH baBB <hick.bbc@...> 04/27 4:31  >>>
Has anyone come across a reference before about using a 65c02 in an Issue
7 BBC ?

I've used them in Issue 4s no problem, but this Issue 7 just starts up
claiming to have only 16K and Language?