testbios loops?

[Li-Ta Lo]

On Fri, 2004-10-08 at 08:58, Dave Aubin wrote:
> Hi,

Why it starts from c000:fffd ? It should starts from c000:0003

Ollie

> 
> It will first do this (I'm using the testbios -t option)
> c000:fffd 0000                ADD       [BX+SI],AL
>         AX=0200  BX=0000  CX=0000  DX=0080  SP=fff8  BP=0000  SI=0000
> DI=0000
>         DS=0040  ES=0000  SS=0030  CS=c000  IP=0002   NV UP DI PL ZR NA
> PE NC 
> c000:ffff 000000              ADD       -86[DI],DL
>         AX=0200  BX=0000  CX=0000  DX=0080  SP=fff8  BP=0000  SI=0000
> DI=0000
>         DS=0040  ES=0000  SS=0030  CS=c000  IP=0004   NV UP DI NG NZ NA
> PO NC 
> c000:0002 74eb                JZ        ffef
>         AX=0200  BX=0000  CX=0000  DX=0080  SP=fff8  BP=0000  SI=0000
> DI=0000
>         DS=0040  ES=0000  SS=0030  CS=c000  IP=0005   NV UP DI NG NZ NA
> PO NC 
> c000:0004 4b                  DEC       BX
>         AX=0200  BX=ffff  CX=0000  DX=0080  SP=fff8  BP=0000  SI=0000
> DI=0000
>         DS=0040  ES=0000  SS=0030  CS=c000  IP=0006   NV UP DI NG NZ AC
> PE NC 
> c000:0005 37                  AAA
>         AX=0306  BX=ffff  CX=0000  DX=0080  SP=fff8  BP=0000  SI=0000
> DI=0000
>         DS=0040  ES=0000  SS=0030  CS=c000  IP=0008   NV UP DI PL NZ AC
> PE CY
> 
> Then it will do this:
> c000:0137 0d0a00              OR        AX,a
>         AX=debf  BX=ffff  CX=0335  DX=0080  SP=ffef  BP=0000  SI=0004
> DI=0002
>         DS=0040  ES=0000  SS=0030  CS=c000  IP=013c   NV UP DI NG NZ NA
> PO NC 
> c000:013a 0000                ADD       [BX+SI],AL
>         AX=debf  BX=ffff  CX=0335  DX=0080  SP=ffef  BP=0000  SI=0004
> DI=0002
>         DS=0040  ES=0000  SS=0030  CS=c000  IP=013f   NV UP DI NG NZ AC
> PO CY 
> c000:013c ba9198              MOV       DX,9891
>         AX=debf  BX=ffff  CX=0335  DX=9891  SP=ffef  BP=0000  SI=0004
> DI=0002
>         DS=0040  ES=0000  SS=0030  CS=c000  IP=0140   NV UP DI NG NZ AC
> PO CY 
> c000:013f 96                  XCHG      AX,SI
>         AX=0004  BX=ffff  CX=0335  DX=9891  SP=ffef  BP=0000  SI=debf
> DI=0002
>         DS=0040  ES=0000  SS=0030  CS=c000  IP=0141   NV UP DI NG NZ AC
> PO CY 
> c000:0140 91                  XCHG      AX,CX
>         AX=0335  BX=ffff  CX=0004  DX=9891  SP=ffef  BP=0000  SI=debf
> DI=0002
>         DS=0040  ES=0000  SS=0030  CS=c000  IP=0146   NV UP DI NG NZ AC
> PO CY 
> c000:0141 9a9a8d9691          CALL      9196:8d9a
>         AX=0335  BX=ffff  CX=0004  DX=9891  SP=ffeb  BP=0000  SI=debf
> DI=0002
>         DS=0040  ES=0000  SS=0030  CS=9196  IP=8d9c   NV UP DI NG NZ AC
> PO CY 
> 9196:8d9a 0000                ADD       [BX+SI],AL
>         AX=0335  BX=ffff  CX=0004  DX=9891  SP=ffeb  BP=0000  SI=debf
> DI=0002
>         DS=0040  ES=0000  SS=0030  CS=9196  IP=8d9e   NV UP DI PL NZ NA
> PE NC 
> 9196:8d9c 0000                ADD       [BX+SI],AL
>         AX=0335  BX=ffff  CX=0004  DX=9891  SP=ffeb  BP=0000  SI=debf
> DI=0002
>         DS=0040  ES=0000  SS=0030  CS=9196  IP=8da0   NV UP DI PL NZ NA
> PE NC
> 
> I'm still looking for the openbios utility.  So far found broken links:(
> I can get some other bios to work, but they appear to be flacky.  I
> really think
> I should be using the one that came programmed on the board.
> 
> Thanks,
> Dave 
> 
> -----Original Message-----
> From: Li-Ta Lo [mailto:ollie at lanl.gov] 
> Sent: Friday, October 08, 2004 10:53 AM
> To: Dave Aubin
> Cc: LinuxBIOS
> Subject: Re: testbios loops?
> 
> On Fri, 2004-10-08 at 08:35, Dave Aubin wrote:
> > Hi,
> >  
> >   I went back to trying to get the Nvida 6800gt card's bios, but still
> 
> > even with dd -if=/dev/mem of=vgabios.rom skip=786432 bs=1 count=32768 
> > I get the same binary as dd -if=/dev/mem of=vgabios.rom skip=1536 
> > count=64.
> > I used dhex (free util) to verify they are the same.
> >   What happens when I run them trough testbios is that once it is done
> 
> > programming 0xc7fff it jump to 0x9 something or other and the video 
> > bios isn't programmed correctly.
> 
> 
> What do you mean by 'programming oxc7ff it jump to 0x9' ?
> 
> Ollie
> 
> 
>