Thanks for the response Jim. I'll check this out tonight and email
results tomorrow morning. I don't recall a pattern but will look for
that tonight.
Marty
______________________________ Reply Separator
_________________________________
Subject: Re: Re[2]: Helios II disk drive - Sol-20
Author: classiccmp_at_u.washington.edu at internet
Date: 3/4/98 2:56 PM
On Wed, 4 Mar 1998, Marty wrote:
> Thanks Sam. The video garbage is all over the screen, even overlaying
> the > prompt (I'll have to fire this up tonight to double-check as I
> haven't had at this machine for a few days). Anyway, if roms go wrong
> is there a source for replacements (wishfull thinking)?
Hmmm... gets me to thinking. Is there any pattern to this "garbage"?
(same characters repeated, etc.) The character display is read directly
out of the 1k of video ram (term used VERY loosely) in the system (static
ram, no refresh issues), and a bad RAM chip or dirty socket can often show
up like this.
This does assume that you are actually getting the SOLOS prompt (">"). If
what you are seeing on the display is a repeating pattern of a graphic and
a 9 (think that is close) which seems to flicker a bit, this would
indicate a problem with the 'Personality Module' or surrounding circuitry.
(ROM bad/missing, module bad/missing, etc...)
Also, is the image otherwise stable? (not rolling and such) If so, then
the bulk of the video sub-system is more or less ok.
-jim
---
jimw_at_agora.rdrop.com
The Computer Garage -
http://www.rdrop.com/~jimw
Computer Garage Fax - (503) 646-0174
------ Message Header Follows ------
Received: from lists3.u.washington.edu by smtp.itgonline.com
(PostalUnion/SMTP(tm) v2.1.9i(b5) for Windows NT(tm))
id AA-1998Mar04.145654.1767.30161; Wed, 04 Mar 1998 14:56:54 -0500
Received: from host (lists.u.washington.edu [140.142.56.13])
by lists3.u.washington.edu (8.8.4+UW97.07/8.8.4+UW97.05) with SMTP
id LAA09316; Wed, 4 Mar 1998 11:29:58 -0800
Received: from mxu2.u.washington.edu (mxu2.u.washington.edu [140.142.32.9])
by lists.u.washington.edu (8.8.4+UW97.07/8.8.4+UW97.05) with ESMTP
id LAA29216 for <classiccmp_at_lists.u.washington.edu>; Wed, 4 Mar 1998
11:29:51 -0800
Received: from agora.rdrop.com (0_at_agora.rdrop.com [199.2.210.241])
by mxu2.u.washington.edu (8.8.4+UW97.07/8.8.4+UW97.09) with ESMTP
id LAA15296 for <classiccmp_at_u.washington.edu>; Wed, 4 Mar 1998 11:29:50
-0800
Received: from agora.rdrop.com (1566_at_agora.rdrop.com [199.2.210.241])
by agora.rdrop.com (8.8.5/8.8.5) with SMTP id LAA24585
for <classiccmp_at_u.washington.edu>; Wed, 4 Mar 1998 11:29:50 -0800 (PST)
Message-Id: <Pine.BSF.3.95.980304112011.23351B-100000_at_agora.rdrop.com>
Date: Wed, 4 Mar 1998 11:29:50 -0800 (PST)
Reply-To: classiccmp_at_u.washington.edu
Sender: CLASSICCMP-owner_at_u.washington.edu
Precedence: bulk
From: James Willing <jimw_at_agora.rdrop.com>
To: "Discussion re-collecting of classic computers"
<classiccmp_at_u.washington.edu>
Subject: Re: Re[2]: Helios II disk drive - Sol-20
In-Reply-To: <1998Mar04.131410.1767.85773_at_smtp.itgonline.com>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
X-To: Discussion re-collecting of classic computers
<classiccmp_at_u.washington.edu>
X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN
Received on Wed Mar 04 1998 - 14:49:04 GMT