From: "Giovanni Ceglia" Newsgroups: comp.os.msdos.djgpp Subject: R: SVGA scrolling Date: Sun, 27 May 2001 22:48:57 +0200 Organization: Wind Telecomunicazioni S.p.A. Lines: 30 Message-ID: <9erpq0$ahl$1@nreadA.inwind.it> References: <311 DOT 990604478048 AT iw0 DOT mailusenet DOT com> NNTP-Posting-Host: 62.98.179.12 X-Trace: nreadA.inwind.it 990997120 10805 62.98.179.12 (27 May 2001 20:58:40 GMT) X-Complaints-To: abuse AT inwind DOT it NNTP-Posting-Date: 27 May 2001 20:58:40 GMT X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 5.00.2314.1300 X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2314.1300 To: djgpp AT delorie DOT com DJ-Gateway: from newsgroup comp.os.msdos.djgpp Reply-To: djgpp AT delorie DOT com 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/ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^