Re: CBM 9060

From: William Levak <wlevak_at_SDF.LONESTAR.ORG>
Date: Mon, 31 Jan 2011 02:47:22 +0000 (UTC)
Message-ID: <Pine.NEB.4.64.1101310239100.17813@sdf.lonestar.org>
On Sun, 30 Jan 2011, Ruud@Baltissen.org wrote:

> Hallo allemaal,
>
>
> My CBM 9060 story so far (from now on: 9090 is meant as well). I
> managed to repair one board, good news so far. The other one keeps
> flashing that the ZeroPage RAM is bad but exchanging the 6810's
> doesn't solve the matter :( It seems that I have to throw in some
> havier debug stuff.

Zero page RAM is the first thing checked.  Anything affecting addressing 
will show up as bad zero page RAM. I don't have a parts list, but the 
schematic shows IC's at 3D and 3C controlling 6810 access.


wlevak@sdf.lonestar.org
SDF Public Access UNIX System - http://sdf.lonestar.org

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