how to put hercules card in graphics mode?

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From: g liu
Date: Thu, 06 Dec 1990 19:12

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how do i put a hercules graphics card in graphics mode?
that is, what do i output to which ports? or write to what
memory? how do i put it back in text mode?
gwoho liu.

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Message-ID: <1990Dec6.191208.7416@nntp-server.caltech.edu>

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!emory!gatech!ukma!usenet.ins.cwru.edu!eagle!data.nas.nasa.gov!mustang!nntp-server.caltech.edu!gwoho
From: gwoho@nntp-server.caltech.edu (g liu)
Newsgroups: comp.os.msdos.programmer
Subject: how to put hercules card in graphics mode?
Message-ID: <1990Dec6.191208.7416@nntp-server.caltech.edu>
Date: 6 Dec 90 19:12:08 GMT
Organization: California Institute of Technology, Pasadena
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