Mail Archives: djgpp/2001/05/27/17:00:24
| From: | "Giovanni Ceglia" <giovanniceglia AT inwind DOT it>
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| Newsgroups: | comp.os.msdos.djgpp
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| Subject: | R: SVGA scrolling
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| Date: | Sun, 27 May 2001 22:48:57 +0200
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| Organization: | Wind Telecomunicazioni S.p.A.
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| Lines: | 30
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| Message-ID: | <9erpq0$ahl$1@nreadA.inwind.it>
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| To: | djgpp AT delorie DOT com
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| DJ-Gateway: | from newsgroup comp.os.msdos.djgpp
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| Reply-To: | djgpp AT delorie DOT com
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It is simle, video memory is swapped with Ram Memory at position 0A0000h
With a buffer of 64k, this buffer is usable for 65536 pixels into 256 color
mode.
If you use for example 320x200x256=64000 pixel there aren't problem, but if
you use resolution more advanced, you must swap video page.
To swap video page, you could know about every video driver!
If you doesn't want problems about this, you must use VESA Standards, now
the mostly video cards supports VESA Standars.
Are you trying to write a video engine with DJGPP?
If yes pleas write me, i tried to write in asm, with DJGPP, but i have many
problems!
Sincerly Giovanni.
--
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Giovanni Ceglia
WebMaster & WebDesigner
http://www.xungame.com/
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