Richard Smith schrieb:
> Merry x-mas to you as well. Hopefully Santa will bring you some
> working bios code. *grin*
:P
>
>
>> else {
>> romSize = *((CARD8 *) (pBIOS + VIA_BIOS_SIZE_POS)) * 512;
>> pRom = pBIOS;
>> sum = 0;
>
>
> What is it getting here? Bios extensions have a size parameter in the
> same area as the signature. Offset 2. (Right after the 0xaa55)
Right, Offset 2 from the Via-M VGA-Bios mvspd_15.rom is 0x7D
0x7D * 512 = 64000
Thats the correct image size before filling.
I have filled up this image with 00 to 65536 and will now try
0x80 for Offset 2
its
> the length in 512 byte chunks. So make sure this number is correct
> for your image size. Does the factory bios have the same values as
> your LB image?
No, see before.
>
> For your fill. The unerased value of a ROM part is 0xFF. So using
> 0xFF as a fill value is probally a good idea.
I will try both (0x00 and 0xFF), and see what happens.
Thanks for the hint.
But one question, how can I fill up the image with 0xFF.
My 0x00 way is to create a file with
dd if=/dev/zero of=bios2nd.rom bs=1 count=fill_lenght
and then
cat vga_original.rom bios2nd.rom > finalvga.rom
>
> --
> Richard A. Smith
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