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- Newsgroups: comp.graphics
- Path: sparky!uunet!math.fu-berlin.de!news.netmbx.de!zelator!leo
- From: leo@zelator.in-berlin.de (Stefan Hartmann)
- Subject: Re: Tseng 24-bit registers info required
- Organization: Puplic-Access-Xenix-System
- Date: Thu, 10 Sep 92 21:05:02 GMT
- Message-ID: <78V6X6M@zelator.in-berlin.de>
- References: <9225114.7502@mulga.cs.mu.OZ.AU>
- Keywords: tseng lab, 24-bit, registers
- Lines: 56
-
- In <9225114.7502@mulga.cs.mu.OZ.AU> kelly@michaelangelo.vis.citri.EDU.AU (Andrew David KELLY) writes:
-
- >I require information on the Mega Eva/2 tseng ET4000 card.
-
- >In particular I want to know the following:
-
- > How to put the card in 24-bit mode.
-
- > How to turn of the raster so that the screen becomes blank, without
- > needing to fill the video memory with zeros (or blank out colour
- > map)
-
- > Is it possible to fit 2 640x400 256 colour images in video memory at
- > once, where the 256 colours are chosen from the 16.7 million
- > available colours.
-
- > At the moment I am displaying images with a maximum of 64 greys,
- > for our experiments this causes too much banding. I want to
- > remove this banding by using 24-bit colour information, and if
- > possible I want to still be able to keep two images in video
- > memory at one time.
-
- > Also I would like to know how to set the colour map. At the moment
- > I can do this, and deliberately convert all the RGB values from
- > values of 0 to 255 into values in the range of 0 to 63. I have just
- > purchased a 24-bit card, and would like to know if to get the extra
- > colours if I simply don't rescale the colour map and switch the card
- > into a 24-bit mode, or whether it is more complicated than this.
-
- > Any routines in C would be nice, but assembler is Ok.
-
- > Thanks for any help.
-
- > Andrew Kelly
-
- > login: kelly@krang.vis.citri.edu.au.
-
- hi,
-
- I gonna post the programming info on the Genoa 7900 ET4000 true color
- SVGA board in its 640x480x24 bit mode today into the a.b.p.misc group
- in GIF format (scanned pictures).
-
- I hope this will help !
-
- Best regards Stefan Hartmann.
- email to: leo@zelator.in-berlin.de
-
-
- --
-
- *************************************************************
- * Stefan Hartmann This is how to contact me: *
- * EMAIL: leo@zelator.in-berlin.de *
- * Phone : ++ 49 30 344 23 66 FAX : ++ 49 30 344 92 79 *
- *************************************************************
-