graphicss video memory screen save

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Article #8747

#8747

From: Tom Johnson
Date: Tue, 16 Jan 1990 23:24

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    I know this has been discussed before, but I can't seem to find it.
    I'm trying to write a program that saves the currently displayed screen
    IN GRAPHICS MODE to a file.  I then want to restore the file directly
    back into video memory.

    I've tried reading from video memory starting from segment A000 or
    whatever the start of graphics memory is, and saving x number of bytes.
    However, when I try to write this back to video memory, the color is
    not displayed.

    Isn't there some way to do this?  Maybe I have to switch bit planes to
    get to the color planes in order to save them.  Anyone got any ideas?

    Tom Johnson
    tomj@hpccc.hp.com

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!hplabs!hpl-opus!hpccc!tomj
From: tomj@hpccc.HP.COM (Tom Johnson)
Newsgroups: comp.sys.ibm.pc
Subject: graphicss video memory screen save
Message-ID: <5060064@hpccc.HP.COM>
Date: 16 Jan 90 23:24:47 GMT
Organization: HP Corp Computing & Services
Lines: 16