Re: Bitbanger (was Re: memory tester)

["Paul R. Santa-Maria" <paulrsm@ameritech.net>]

A IIgs memory checker could be a simple ProDOS 8 program that needs a few
kilobytes of motherboard memory to run code to check the megabyte of memory
on the expansion card.  A memory checker that only runs on an operating
system that takes up all the memory on the card?  Sorry, I think that is a
poor design.

Paul R. Santa-Maria
Ann Arbor, Michigan  USA
paulrsm@ameritech.net

John King <joki@eskimo.com> wrote in article
<8br5re$jiu$1@eskinews.eskimo.com>...
> This may be obvious but any RAM testing program that is hosted on the
target
> has a similar weakness.
> 
> If your RAM is so bad that you cannot run GS/OS then use that as your
test.
> Start twiddling chips until you get GS/OS working. I suppose some
knowledge
> of the most likely chips to twiddle would speed things up. I have no idea
> about that. If some or all of the RAM resides on cards, perhaps you can
> switch that out, or remove it temporarily.
> 
> Another idea is to pull all unnecessary cards since they affect address &
> data lines.