RE: WD90C24 Anyone?
On Tue, 7 Nov 2006, Chris Schumann wrote: [mailto:[EMAIL PROTECTED] On Behalf Of Tim Roberts [EMAIL PROTECTED] wrote: I have an old ThinkPad 750P. It uses the WD90C24 chip, which was in the old svga driver. What would it take to port that to the new XFree86 code? I'm not above writing assembly code or digging in here, I just don't know where to start or how much effort it might take... swatting a fly or eating an elephant? Holy moly! You have a whopping 1 megabyte of video RAM there. Will it work with the VESA fb driver? If not, then you might as well give up. I have the source code for their old Windows 3.1 driver, and it is more than 76,000 lines of 16-bit x86 assembler. The blitter provided virtually no acceleration, so you won't really be giving anything up to use the fb driver. This machine didn't quite get the VESA in firmware. It was provided by a DOS TSR, which was required for the Win3.1 and Win95 drivers. I thought it was for use with VESA, but now I'm not sure. Anyway, I don't think it's a good idea to require a DOS TSR for video in Linux. There is source for this chip somewhere in the annals of X code. I think XFree86 supported it as late as 3.1. 3.3.6, actually. The only mode I've seen with modern distributions is 320x200x1. It's not pleasant. I'd also like to get the pen interface to work on it, but one step at a time! :) So what's that next step? You can start with reading the DESIGN document included in the distribution, using the 3.3.6 pvga1 driver as a guide in filling in the blanks. Marc. +--+--+ | Marc Aurele La France | work: 1-780-492-9310 | | Academic Information and| fax:1-780-492-1729 | |Communications Technologies | email: [EMAIL PROTECTED] | | 352 General Services Building +--+ | University of Alberta | | | Edmonton, Alberta |Standard disclaimers apply| | T6G 2H1 | | | CANADA | | +--+--+ XFree86 developer and VP. ATI driver and X server internals. ___ Devel mailing list Devel@XFree86.Org http://XFree86.Org/mailman/listinfo/devel
RE: WD90C24 Anyone?
> [mailto:[EMAIL PROTECTED] On Behalf Of Tim Roberts > [EMAIL PROTECTED] wrote: > > I have an old ThinkPad 750P. It uses the WD90C24 chip, which was in > > the old svga driver. > > > > What would it take to port that to the new XFree86 code? > I'm not above > > writing assembly code or digging in here, I just don't know > where to > > start or how much effort it might take... swatting a fly or > eating an > > elephant? > > Holy moly! You have a whopping 1 megabyte of video RAM there. > > Will it work with the VESA fb driver? If not, then you might > as well give up. I have the source code for their old > Windows 3.1 driver, and it is more than 76,000 lines of > 16-bit x86 assembler. The blitter provided virtually no > acceleration, so you won't really be giving anything up to > use the fb driver. This machine didn't quite get the VESA in firmware. It was provided by a DOS TSR, which was required for the Win3.1 and Win95 drivers. I thought it was for use with VESA, but now I'm not sure. Anyway, I don't think it's a good idea to require a DOS TSR for video in Linux. There is source for this chip somewhere in the annals of X code. I think XFree86 supported it as late as 3.1. The only mode I've seen with modern distributions is 320x200x1. It's not pleasant. I'd also like to get the pen interface to work on it, but one step at a time! :) So what's that next step? Chris ___ Devel mailing list Devel@XFree86.Org http://XFree86.Org/mailman/listinfo/devel
Re: WD90C24 Anyone?
On Tue, 2006-11-07 at 16:26 -0800, Tim Roberts wrote: > [EMAIL PROTECTED] wrote: > > I have an old ThinkPad 750P. It uses the WD90C24 chip, which was in > > the old svga driver. > > > > What would it take to port that to the new XFree86 code? I'm not above > > writing assembly code or digging in here, I just don't know where to > > start or how much effort it might take... swatting a fly or eating an > > elephant? > > Holy moly! You have a whopping 1 megabyte of video RAM there. > > Will it work with the VESA fb driver? If not, then you might as well > give up. I have the source code for their old Windows 3.1 driver, and > it is more than 76,000 lines of 16-bit x86 assembler. The blitter > provided virtually no acceleration, so you won't really be giving > anything up to use the fb driver. > I thought I was the last cave man. I used a WD90C30 with the svga driver in 4.4 when I ported the HGA driver. You're either looking at flies or my binoculars flipped over in the last 12 months. Enjoy Lee Olsen [EMAIL PROTECTED] ___ Devel mailing list Devel@XFree86.Org http://XFree86.Org/mailman/listinfo/devel
Re: WD90C24 Anyone?
[EMAIL PROTECTED] wrote: > I have an old ThinkPad 750P. It uses the WD90C24 chip, which was in > the old svga driver. > > What would it take to port that to the new XFree86 code? I'm not above > writing assembly code or digging in here, I just don't know where to > start or how much effort it might take... swatting a fly or eating an > elephant? Holy moly! You have a whopping 1 megabyte of video RAM there. Will it work with the VESA fb driver? If not, then you might as well give up. I have the source code for their old Windows 3.1 driver, and it is more than 76,000 lines of 16-bit x86 assembler. The blitter provided virtually no acceleration, so you won't really be giving anything up to use the fb driver. -- Tim Roberts, [EMAIL PROTECTED] Providenza & Boekelheide, Inc. ___ Devel mailing list Devel@XFree86.Org http://XFree86.Org/mailman/listinfo/devel
WD90C24 Anyone?
I have an old ThinkPad 750P. It uses the WD90C24 chip, which was in the old svga driver. What would it take to port that to the new XFree86 code? I'm not above writing assembly code or digging in here, I just don't know where to start or how much effort it might take... swatting a fly or eating an elephant? Opinions welcome. Thanks, Chris ___ Devel mailing list Devel@XFree86.Org http://XFree86.Org/mailman/listinfo/devel
