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----- Forwarded message from [email protected] -----
Date: Sat, 10 Jan 2004 19:36:26 +0100
From: [email protected]
Reply-To: [email protected]
Subject: Re: Trident driver
To: joel.dice-UWkI3MzZw7X2fBVCVOL8/[email protected]
Quoting Joel Dice <[email protected]>:
> Hello all. The following questions are mainly for Keith Packard, since he
> is the original author, but if anyone else has any tips, I'd appreciate
> them.
hi
> I've spent a bit of time lately trying to get the Trident driver up to
> date, but I'm not sure what to do next. It now compiles nicely, but when
> I run the server it quickly exits with the following message:
>
> Fatal server error:
> Trident COP not visible
no idea :D
> I should note that I had to change the InitCard(char*) function in
> tridentstub.c to find my card (PCI device 0x10238500 instead of
> 0x10239525). I have a CyberBlade/i1 (rev 6a). It occurred to me that
> such a simple change will not work if the rest of the code is written
> specifically for a different device (the one identified by 0x10239525).
> Is this the case, or should the driver work for any Trident card?
>
> Either way, I'm not sure how to proceed. My main question is this: How
> does one write or modify a video driver without documentation? So far
> I've considered three possibilities:
>
> Reverse-engineer a Windows driver.
> If this is the proper way to do it, I give up now.
>
> Study the relevant Xfree86 DDX.
> This is what I've been doing, but I'm having a hard time mapping
> the DDX system to the KDrive system. Maybe I just need to spend
> more time on it.
>
> Beg the manufacturer to provide documentation, probably under a NDA.
> Fine with me, if it's likely to succeed. But will I still be
> allowed to write/modify an open-source driver with that
> information?
get the documentation at
http://sxpert.esitcom.org/EPIA/
> So, how is it done? I wrote some simple device drivers in college, but
> then we had documentation. Now I'm lost. Any tips would be most
> appreciated.
well, hoping to see that soon so I can use Xtrident instead of Xvesa on my epia
carpc.
> - Joel
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