Path: utzoo!utgpu!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!ncar!ames!haven!adm!nlm-mcs!seamans
From: seamans@nlm-mcs.arpa (James R. Seamans)
Newsgroups: comp.sys.ibm.pc
Subject: EGA addressing
Message-ID: <8538@nlm-mcs.arpa>
Date: 7 Dec 88 20:46:06 GMT
Organization: NLM/LHNCBC, Bethesda, Md.
Lines: 29

Over the last year we have been using an imaging board produced by
Imaging Technolgy - PFG+.  

We use a IBM-AT with EGA card and monitor.

Problem:  The PFG+ board is configured to operate at memory address
          0xA000000 which is where the EGA enhanced mode also resides.
          When we excute the imaging software everything works fine until
          the program exits.  The EGA then attempts to reload its fonts
          ( I think ) back into the 0xA000000 area which then causes
          a system hang.  It's a pain to turn off and on every time
          you wish to use the software.

Question:  If the EGA is in enhanced mode and utilizing the 0xA000000
           memory address.  Are the 0xB000000 and 0xB800000 areas that
           are normally used by CGA and MONO now FREE to be used by
           other processes.
        
     - Does anyone see another work around for this addressing problem?


BTW - The 0xD000 area has been taken by the IBM 3363 Worm controller card.
      the 0xC000 seems to be used by the rest of the world.


James Seamans   National Library of Medicine
                Lister Hill National Center for Biomedical Communications

seamans@seaimage.nlm.nih.gov