IBM 5155 analogue display fault

[Dwight K. Elvey]

>From: ard at p850ug1.demon.co.uk
>
---snip---
>However, I make those modifications as reversable as possible (I would 
>rather not cut a PCB track, but sometimes there is no other way, for 
>example). And I don't make them if I don't have to (which is what this 
>darn thread started off about).
>
>-tony
>
>

Hi
 I guess I'm like you. I have a Olivetti M20 and wanted
to get the CPM-8000 running on it. The original memory
cards had 16K DRAMs that gave the system 224K. To run
CPM-8000 I needed to have 64K DRAMs. It required that I
unsolder the DRAMs, some capacitors and cut a power line
to configure for the larger DRAMs.
 While I would have prefered to get the larger memory
boards from the manufacture, this was not all that practical.
I felt that getting working images of the CPM-8000 was
more important.
 A computer that doesn't work is an interesting pile of
hazardous waste. One that works is a window into what was.
Dwight