rcstack@rwa.urc.tue.nl (Studenten Vereniging Stack) (01/21/91)
A friend of mine recently bought a Chicony 102 VGA card with 512kb memory (He should have bought a Tseng 4000 card of course :-)) and most video modes work perfectly. These include 800 * 600 16 colors, 1024 * 768 16 colors. 320 * 200 256 colors work ok, only the 640 * 480 256 color mode doesn't work. The picture looks like the wrong horizontal frequency is generated, I see a picture but this is repeated 6 or 7 times horizontally on the screen. I have tested the card with VPIC 34, CSHOW 8.21 and VUIMG 2.90 all have the same effect. The graphics chip is a Trident 8800, I think the card is simply broken but perhaps somebody knows a solution? Thanks in advance Paul Derks -- ============================================================================= Email: Internet: rcstack@urc.tue.nl Bitnet: rcstack1@heitue5 Computer Association STACK, Computing Centre RC 1.58, Eindhoven University of Technology, POBox 513, 5600 MB Eindhoven, Holland.
toepfer@du9ds3.uni-duisburg.de (HaJo Toepfer) (01/23/91)
I think the programs you tested try to to access the video ram directly. In 640x480 mode with 256 colors those programs have to do bank switching on the VGA card. Unfortunately bank switching on TVGA goes a quite unusual way. As an owner of a TVGA too I tried to inspect the VGA-bios but found nothing else than garbage. If you wnat to check out the general working of this mode you should trie to access it via INT 10. Bye the way: Any one out there who knows about accessing extended TVGA modes, please post. Playing with FractInt I found out that even such good programmers are not able to handle TVGA 's in the right manner. Thanks a lot Hansjoerg Toepfer
sunyat@itsgw.rpi.edu (Eric Hsiao) (01/24/91)
Hi, I've got a Trident 8900 TVGA chipset, but unfortunately I can't seem to
get Deluxe Paint Enhanced to recognize it. I want to show the 640x480x256
mode, but nothing seems to work. Is there ways to add drivers? My card has
512K on it. Is Trident a new chip set that's not as well known as Paradise,
Genoa, etc.? How does it compare to other chipsets?
Eric
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| FTP to wuarchive "gn91-01.zip" > games, industry news, IBM, Amiga, etc.< | vandevek@fergvax.unl.edu (James M. VandeVegt) (01/24/91)
In article <toepfer.664632858@du9ds3> toepfer@du9ds3.uni-duisburg.de (HaJo Toepfer) writes: >Bye the way: Any one out there who knows about accessing extended TVGA modes, >please post. Playing with FractInt I found out that even such good programmers >are not able to handle TVGA 's in the right manner. > Hansjoerg Toepfer I am interested in about the same information. I use Cshow to view GIFS and it has the driver for TVGA and I haven't had any luck with it. I have a TVGA card with 512K and a Supercom 14" non-interlaced 800x600 monitor. Compushow has its standard C/MC/E/VGA modes which work beautifully. Then, with the install program, I installed the driver for TVGA which gave me a few more separate menu options from 640x400x256 to 1024x768x16 that apparently used the video hardware. Whenever I tried to use these modes, it appeared that it was out of horizontal sync. The picture would streak sideways on 640x480 and blow all across the screen in the 800x600. Any ideas? | James M. VandeVegt | University of Nebraska | | vandevek@fergvax.unl.edu | Computer Science and Engineering | ---------------------------------------------------------------------- | Insert standard disclaimer here. |
v119l94u@ubvmsd.cc.buffalo.edu (Dennis G Crawford) (01/24/91)
In article <1991Jan24.003528.2239@hoss.unl.edu>, vandevek@fergvax.unl.edu (James M. VandeVegt) writes... >I am interested in about the same information. I use Cshow to view >GIFS and it has the driver for TVGA and I haven't had any luck with >it. I have a TVGA card with 512K and a Supercom 14" non-interlaced >800x600 monitor. Compushow has its standard C/MC/E/VGA modes which >work beautifully. Then, with the install program, I installed the >driver for TVGA which gave me a few more separate menu options from >640x400x256 to 1024x768x16 that apparently used the video hardware. >Whenever I tried to use these modes, it appeared that it was out of >horizontal sync. The picture would streak sideways on 640x480 and >blow all across the screen in the 800x600. Any ideas? Ideas...!? Yeah! I have the SAME problem.. maybe there some driver that we're missing, or just not a compatible card, or something.. if SOMEONE can enlighten us, please... we're all ears! Thanks in advance.. )_Dennis_( ---- ... D-Man! -=- WRUB Amherst 640AM -=- Dennis G. Crawford -=- SUNY Buffalo . .. V119L94U@UBVMS.CC.BUFFALO.EDU -=- CRAWFORD@AUTARCH.ACSU.BUFFALO.EDU .. . UUNET!UBVMSC.CC.BUFFALO.EDU!V119L94U@UUNET.UU.NET -=- DGCRAWF@UMASS ... How could something this simple turn into something this serious ....
tom@uokmax.ecn.uoknor.edu (Thomas Lynn Egelston Ii) (01/24/91)
v119l94u@ubvmsd.cc.buffalo.edu (Dennis G Crawford) writes: >In article <1991Jan24.003528.2239@hoss.unl.edu>, vandevek@fergvax.unl.edu (James M. VandeVegt) writes... >>I am interested in about the same information. I use Cshow to view >>GIFS and it has the driver for TVGA and I haven't had any luck with >>it. I have a TVGA card with 512K and a Supercom 14" non-interlaced >>800x600 monitor. Compushow has its standard C/MC/E/VGA modes which >>work beautifully. Then, with the install program, I installed the >>driver for TVGA which gave me a few more separate menu options from >>640x400x256 to 1024x768x16 that apparently used the video hardware. >>Whenever I tried to use these modes, it appeared that it was out of >>horizontal sync. The picture would streak sideways on 640x480 and >>blow all across the screen in the 800x600. Any ideas? > Ideas...!? Yeah! I have the SAME problem.. maybe there some driver >that we're missing, or just not a compatible card, or something.. if SOMEONE >can enlighten us, please... we're all ears! You are, in fact, missing something. To use the oddball modes, such as 800x600x16, 640x480x256, and (I think) 640x400x256, you must have a MultiSynching monitor. The sync rates required are higher than normal VGA monitors can handle. I'll try to find the manual for more details, but that's the basic story... -- Tom Egelston Internet: tom@uokmax.ecn.uoknor.edu Disclaimer: Don't get so stressed!! It's nothing but a bunch of 1's and 0's... "A man walked up to me and said, 'I'd like to change your mind, by hitting it with a rock,' he said, 'though I am not unkind...'" -- TMBG
bressler@iftccu.ca.boeing.com (Rick Bressler) (01/25/91)
I had a similar problem. Turned out that the default drivers were using non-interlaced modes and my monitor while a multi-sync would only handle those frequencies in an interlaced mode. I recall patching the driver sets I used with debug. Problem solved! I don't have the manual here at the moment, but near as I can recall these modes are documented in the manual. I was wondering at first why they had modes that appeared to be identical. More digging identified the lower numbered codes ~ 40 - 49 being the non interlaced and 50 - 59 being the interlaced modes. If there is enough interest, I might be able to retrace my steps (pardon the pun) and post a general guideline for finding and patching the problem. Rick
toepfer@du9ds3.uni-duisburg.de (HaJo Toepfer) (01/25/91)
I have a NEC MultiSync cabled to my TVGA card. So thats not the problem for the difficulties I described. My monitor looks very pretty in extended TVGA modes but the picture consists of portions of puzzles at the wrong place. I think this is a hint for errors in direct video RAM access. We are dealing with different problems in this discussion and should be aware of mixing them up. Ciao, Hanjo Toepfer
mcphail@dataco.UUCP (Alex McPhail) (01/29/91)
In article <toepfer.664793604@du9ds3> toepfer@du9ds3.uni-duisburg.de (HaJo Toepfer) writes: > >I have a NEC MultiSync cabled to my TVGA card. So thats not the problem for >the difficulties I described. My monitor looks very pretty in extended TVGA >modes but the picture consists of portions of puzzles at the wrong place. >I think this is a hint for errors in direct video RAM access. We are >dealing with different problems in this discussion and should be aware of >mixing them up. > >Ciao, > Hanjo Toepfer I have a "dual sync" monitor, which is similar to a multisync monitor, and it *is* capable of handling the super VGA bandwidth (1024x768x256). Yet my CSHOW, like other people's, has trouble in some modes using my TVGA adapter. So like Hanjo, I can attest that it is not the monitor that is the problem. I don't know what the problem is, but if there is a solution, I would love to hear it. ============================================================================ ________ |\ / Alex McPhail | \ / | \ / mail to mcphail@dataco |---X (uunet!mitel!melair!dataco!mcphail) | / \ | / \ The opinions are mine alone. |/_____\ The rest is yours. Alex