PCI VGA Card Initilization (SIS6326 / PT80)
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hello, all
thank you very much for all these reply mails.
my saga of VGA initialization continues. it occurs to me that the x86 emulation for the VGA bios is a long process. SiS6326 chipset has support inside XFree86 & digging out the BIOS code from here is also a big story. hence i was looking for a rather quickish solution. currently i'm trying to use sis_*.c files from XFree86 source. dont know how but my monitor displays 2 red & 1 green vertical lines. the sis_bios source code searched for the mode, memory references inside the BIOS at 0x20A offset & it failed to find the mode & other info. AOpen BIOS version is 2.25.
could anybody of you please share your success story of VGA initialization on MIPS board with me??
many thanks in advance.
regards,
girish.
----- Original Message -----
From: "Dan Aizenstros" <[email protected]>
To: <[email protected]>; <[email protected]>; <[email protected]>; <[email protected]>
Sent: Friday, March 22, 2002 4:10 AM
Subject: Re: Re: PCI VGA Card Initilization (SIS6326 / PT80)
Hello Dominic,
Actually it was Girish Gulawani who said he used the MILO bios not Zhang. He said he was using the files vgaraw1.c and vgaraw2.c from MILO. Those files do not use the x86emu BIOS emulator but try to directly initialize the VGA adapter.
Dan Aizenstros
Software Project Manager
QuickLogic Canada
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Dominic Sweetman <[email protected]> 03/21/02 08:28 AM >>>
Dan,
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Is Algorithmics BIOS emulator not the x86emu code that can be found in the Alpha MILO and the XFree86 code base as Alan Cox mentioned?
It's an entirely indepedent invention of the same idea. I've no idea whether it's any better/worse, but it sounded like our binary was working for Zhang better than the MILO he'd built.
Dominic
Algorithmics Ltd
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Girish,
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it occurs to me that the x86 emulation for the VGA bios is a long process.
It is. But I believe that video chip companies have the chip designer and the BIOS/Windows driver developer working at adjacent desks. If you knew everything they'd ever said to each other, then there would be no need for an x86 emulator.
We thought the x86 emulator was simpler; and evidently so did the MILO people...
Signature · 5 lines
Dominic Sweetman Algorithmics Ltd The Fruit Farm, Ely Road, Chittering, CAMBS CB5 9PH, ENGLAND phone +44 1223 706200/fax +44 1223 706250/direct +44 1223 706205 http://www.algor.co.uk