From: sandmann AT clio DOT rice DOT edu (Charles Sandmann)
Message-Id: <10105260220.AA13221@clio.rice.edu>
Subject: Re: SRAM chip access problem
To: eliz AT is DOT elta DOT co DOT il
Date: Fri, 25 May 2001 21:20:22 -0500 (CDT)
Cc: alex AT compuweigh DOT com (Alex Oleynikov), djgpp AT delorie DOT com
In-Reply-To: <1659-Fri25May2001195731+0300-eliz@is.elta.co.il> from "Eli Zaretskii" at May 25, 2001 07:57:32 PM
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> Are you really using CWSDPMI r4?  If so, I suggest to upgrade to r5.

Yes, that's the fix.  R4 had a bug in the last page of address space when
mapping which would round up the end address to 0, and thus none of
the pages got mapped.  

> > Here's portion of the code trying to peek at the data:
> >  mapping.size=0x80000;
> >  mapping.address=0xfff80000;

Add these together and you get 0 ...  This is one of the bugs fixed in
r5, per http://clio.rice.edu/cwsdpmi/r5change.txt