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echo: os2prog
to: John Poltorak
from: Rob Landley
date: 1995-03-10 20:40:28
subject: OS/2 16MB barrier

> I have spent the last couple of months trying to find why I can't get Warp
> to boot in more than 16MB of memory, and have drawn a blank on the problem.
> I realise that this may not necessarily be on topic here, but someone may be
> able to suggest how I can find out what is going wrong.

When you have LESS than 16 megs of memory, what does rmview say about the
driver?  (is the DMA 32 bit or not?)

32 bit DMA can access all memory, but older cards with 16 bit DMA can only
access the first 16 megs, which is why OS/2 will only use memory above 16
megs for swap space if any of your cards use 16 bit DMA.

As for it actually trashing the system...  Beats me.  Perhaps you have a 32
bit DMA controller that only has the first 16 pins connected or something? 
(I.E. it's reporting itself as a 32 bit DMA, but it doesn't WORK right when
OS/2 tries to use it as one.)
 
Rob
 
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