Article View: comp.os.msdos.programmer
Article #7001Re: Accessing full VGA colour/Grey scale in C pre
From: andrew
Date: Fri, 07 Jun 1991 05:07
Date: Fri, 07 Jun 1991 05:07
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> > I reccomend the book: > > Programmers Guide to PC and PS/2 Video Systems > published by Microsoft Press. > I also recommend this book but, I am awair of two errors in the book (or at least they didn't work when I tried them). 1) It does not tell you how to program the palette registers on the DAC. This was a problem for me because the code I was writing was for XENIX and I was told not to use the BIOS for anything I did. I still don't know how to do this. 2) The register number for the overscan in the book I had claimed to be register 0x11. The code only worked when I used register 0x31 (undocumented in this book) as the overscan. The symptoms were bizzar too. Again if anyone knows why 0x31 is correct please let me know. Andrew.
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arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!wuarchive!waikato.ac.nz!comp.vuw.ac.nz!canterbury!otago.ac.nz!andrewReferences:
<1017@macuni.mqcc.mq.oz> <1991Jun6.083037.21366@kessner.denver.co.us>Show Full Headers
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!wuarchive!waikato.ac.nz!comp.vuw.ac.nz!canterbury!otago.ac.nz!andrew Newsgroups: comp.os.msdos.programmer Subject: Re: Accessing full VGA colour/Grey scale in C pre Message-ID: <1991Jun7.180739.495@otago.ac.nz> From: andrew@otago.ac.nz Date: 7 Jun 91 18:07:39 NZDT References: <1017@macuni.mqcc.mq.oz> <1991Jun6.083037.21366@kessner.denver.co.us> Organization: University of Otago, Dunedin, New Zealand Lines: 22