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- Path: sparky!uunet!gumby!wupost!cs.utexas.edu!ut-emx!ccwf.cc.utexas.edu
- From: baylor@ccwf.cc.utexas.edu (Baylor)
- Newsgroups: comp.lang.pascal
- Subject: Re: tp graphics
- Message-ID: <83776@ut-emx.uucp>
- Date: 16 Nov 92 21:46:51 GMT
- Sender: news@ut-emx.uucp
- Organization: The University of Texas at Austin, Austin TX
- Lines: 17
-
- >
- >As to SetActivePage and SetVisualPage, Borland has not produced a 320x200x256 driver
- >that does have working page routines; I've never found one that does and I've quite
- >a collection!! I've never found out why, because it is SOOOO simple to implement but
- >they just HAVEN'T DONE IT YET!! Again, Scott's gametp10.zip contains the facility
-
- They haven't done it yet because it's imposible.
- That is if you're refering to spare video pages i mode $13.
- Mode $13 is linear because they disabled chain4. 320x200 uses all
- 64k available. To get around this and have spare pages, you either need
- to go planar (mode Y 320x200x4 linear mapping) or else create a virtual
- page like array[0..64000] of byte and when swapping you actually
- do a lds array, movsw of the whole page (how sprites, wgt and i think
- gametp does it).
- - baylor
-
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-