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Re: II+ flakiness

Subject: Re: II+ flakiness
From: Linards Ticmanis <ticmanis@gmx.de>
Date: Sat, 05 Feb 2011 20:47:40 +0100
In-reply-to: <8r2tbnF4dcU1@mid.individual.net>
Newsgroups: comp.sys.apple2
Organization: Arcor
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Thanks a lot to both of you, Patrick and D. Finnigan!

On 02/04/2011 07:03 PM, Patrick Schaefer wrote:

> So it seems that the /WR signal remains active while the addres counter 
> is incremented. Sitting at the BASIC prompt means ROM access and RAM 
> read only. Starting up means write access to the memory area below $800.

Yeah, that's a very good lead.

D. Finnigan wrote:

> You might find this Service documentation useful: 
> http://macgui.com/kb/article/759

I exchanged all chips having to do with R/W according to the service
documentation (except for the 8T97 at H5 which I just rotated around
with the other two, since I don't have any spares of that), and I
reseated the rest. Now we'll see; so far, there have been no more
crashes, but it's only been running for one hour or so.

-- 
Linards Ticmanis

References:
- II+ flakiness
  - From: Linards Ticmanis <ticmanis@gmx.de>
- Re: II+ flakiness
  - From: Patrick Schaefer <pa.schaefer@web.de>

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