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From: bob@vmix.UUCP (Bob Stoll)
Newsgroups: comp.sys.ibm.pc
Subject: IBM PC memory map locations
Message-ID: <193@vmix.UUCP>
Date: Fri, 3-Jul-87 14:34:52 EDT
Article-I.D.: vmix.193
Posted: Fri Jul  3 14:34:52 1987
Date-Received: Sat, 4-Jul-87 11:09:29 EDT
Distribution: na
Organization: Vermont Microsystems Inc. Winooski, Vt. 05404 (802) 655-2860
Lines: 7

We are creating a graphics board which needs 64K of memory space on
the IBM PC and are interested in who is using what addresses.  Is there
a central repository for this information?  Our first pass uses A000:0
to A000:FFFF but we find that this in incompatable with the VGA and EGA
high resolution graphics modes.  We also tried D000:0 to D000:FFFF but 
this crashes the machine in certain older versions of BIOS ROMS (not to
mention PC clones).  Any help would be appreciated.