Help for Mod my Bios (HD6850)

[vanden]

Hello,

I have a Mac Pro 2008 and HIS HD 6850 IceQ X Turbo graphic card (PC/no EFI), with no other graphics card EFI I can not boot on OSX.
Here the bios extracted with GPU-Z.0.7.8 : HIS_HD_6850_IceQ_X_Turbriginal_Bios
If someone can add EFI and post the modified rom, that would be great !
I could install OSX !

I have another question for solve the problem PCIE@1.1.
I saw here the procedure but is it the same for the HD6870 and HD6850 ?

 

[vanden]

I have another question for solve the problem PCIE@1.1.
I saw here the procedure but is it the same for the HD6870 and HD6850 ?

Ok I have no resistor in R3, on my HD6850, I recovered a resistor (10K) on a dead card, but impossible to weld !
The resistor is really too small !
But I tried with a pen with conductive ink : it is ok

I miss it more than EFI Bios ...

 

[vanden]

Well, as nobody wants to help me I installed OS X 10.8.6 on VMWare workstation 10. it works !
I tried adding EFI, to my Bios with Zeus but I get an error :

So I tried with RomCreator (as explained here), I get no error.
Here's the modified bios by RomCreator.
So I tried to flash my card with atiflash 4.17 (On pc) but I get an error:

Finally I tested ATIWinFlash (On mac) : Flash ok !

But disaster, on reboot ... black screen, Windows unbootable.
I tried to flash original bios with atiflash (DOS) on a PC (with my HD6850 + a PCI graphics card) and the MacPro (with my HD6850 + a PCIE graphics card): Same result : atiflash not seen my HD6850 ...
Also tested (on the mac pro) ATIWinflash : not see my HD6850 ...

I suppose my card is out of service ?

 

[vanden]

No, I found a solution :
http://www.techpowerup.com/forums/threads/ati-5850-bad-bios-flash-atiflash-no-adapter-found.154525/
http://www.techpowerup.com/forums/a...mpletely-gone-wrong-ati-bios-flash-pdf.44196/
slight variation :
My chip is MX25L1005.
I use wire from an old IDE cable, and link Pin 1 to 3.3V ATX.

Boot with 3.3V ATX on Pin 1 and ATIFlash recognizes my HD6850, remove the 3.3V ATX and flash.
it works !

Ok ! return to the starting point ...

Now I test to add EFI with netkas script

Last login: Mon May 12 11:32:54 on console
Mac-de-Admin:~ admin$ blocknum=`printf %d "'\`dd if=myrom.rom bs=1 skip=2 count=1 2>/dev/null\`"`
Mac-de-Admin:~ admin$ size=$(($blocknum * 512))
Mac-de-Admin:~ admin$ dd if=6850.efi.rom of=myrom.rom bs=$size seek=1 conv=notrunc
dd: bs must be between 1 and 9223372036854775807​

Same mistake as Zeus !

After some research on netkas forum I found :

Mac-de-Admin:~ admin$ blocknum=128
Mac-de-Admin:~ admin$ size=$(($blocknum * 512))
Mac-de-Admin:~ admin$ dd if=6850.efi.rom of=myrom.rom bs=$size seek=1 conv=notrunc
0+1 records in
0+1 records out
45056 bytes transferred in 0.000366 secs (123113069 bytes/sec)
Mac-de-Admin:~ admin$ python fixrom.py myrom.rom myrom.rom
Before:
OpRom (size=65536, indicator_offset=0x1f1, indicator=0x80, checksum=0x0)
OpRom (size=45056, indicator_offset=0x31, indicator=0x80, checksum=0xff)
RawData (size=20480)

After:
OpRom (size=65536, indicator_offset=0x1f1, indicator=0x0, checksum=0x80)
OpRom (size=45056, indicator_offset=0x31, indicator=0x80, checksum=0xef)
RawData (size=20480)​

Flash with ATIFlash (DOS / On PC) : it works well with Windows.
But (on Mac Pro) no Boot screen on VGA ... and I can not test the other outputs for now ...

 

[666sheep]

Congrats.
Now you know what fun is to figure out things by yourself
Especially when somebody earlier blazed the trail and all the info is within arm's reach.

 

[vanden]

Yes for sure !
But a little help would have saved me time and a big scare !
The advantage is that now I have no fear for flashing a AMD card !

Otherwise I tested 2 DVI outputs and 1 HDMI output, there is only the DP output I have not tested.
Boot Screen :
DVI-A (bottom) = VGA = KO
DVI-I dual-link (bottom) = OK
DVI-D single-link (above) = KO
HDMI = OK
DP = ?

Here my EFIBios.