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Author Topic: make your own radeon HD 5770/5870/6870/6850 Mac ROM!  (Read 540170 times)
SMIKX
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Posts: 76



« Reply #510 on: July 10, 2017, 05:12:57 PM »

windosmac

Sorry, it's been so long since I flashed anything using AtiFlash I'd need to brush up.

I usually use AtiWinflash. It works OK for me in a dedicated install of Win 7 on it's own HDD ( no Bootcamp ).
« Last Edit: August 02, 2017, 02:34:01 PM by SMIKX » Logged

Mac Pro 4,1 upped to 5,1 Dual Quad Core 2.93ghz 17Gb 480Gb SSD TRIM enabled.
HIS HD 7950 3Gb 5.0 GT/s EFI on mDP to DVI + DVI to DVI.
10.9.5 - 10.12.6  - 10.6.8 - Win 7 not Bootcamp. 
AREA 2 port USB 3.1 & Inateck USB 3.0 4 port in OS X 10.9.5.
jamesb
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« Reply #511 on: November 17, 2017, 12:55:30 AM »

I have a HD XFX 6870 Dual fan part number HD687A-ZD and have not had the result I have hoped for. None of the ports are capable of producing the typical Apple boot screen.
The third bite on the original Rom is 80 which converted to decimal is 128. Opening terminal I ran blocknum=128 size=$(($blocknum * 512))dd if=6870.efi.rom of=pc6870.rom bs=$size seek=1 conv=notrunc : then in terminal  python fixrom.py pc6870.rom pc6870.rom. Not sure what is wrong here perhaps more skilled heads can prevail with some assistance.  I have attached the original Rom issued with the card for reference and an image of my card.
 


* l1600.jpg (244.68 KB, 1600x1415 - viewed 0 times.)
* XFX.HD6870.rom (128 KB - downloaded 1 times.)
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Denny
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