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Author Topic: make your own radeon HD 5770/5870/6870/6850 Mac ROM!  (Read 715961 times)
SMIKX
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« 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 214 times.)
* XFX.HD6870.rom (128 KB - downloaded 113 times.)
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Denny
vinnie1978
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« Reply #512 on: January 31, 2018, 06:27:50 PM »

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.
 


* HD687A-ZD.efi.rom (128 KB - downloaded 84 times.)
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Tammygeawl
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WWW
« Reply #513 on: March 19, 2018, 04:17:34 AM »

I consider, that you commit an error. I can defend the position. Write to me in PM, we will discuss.


* 284.gif (2.62 KB, 50x50 - viewed 533 times.)
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Traace
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« Reply #514 on: July 18, 2018, 09:06:19 AM »

There was a PowerColor HD 5870 on ebay for cheap, I coudn't resist and bought it.

Unfortunalty the Original bios from PowerColor is to big to fit EFI. For me it looks like they leftover trash code in that bios.

However, the card is almost reference design. I'm trying @biho Bios for Asus reference cards now.

I've a PC with couple of PCIe slots and GPUs, that will come handy if I brick the card. Backup is ready ofc, wish me luck Smiley

Edit:
Well, that was quick, the flash went fine with that Asus Bios, nothing bricked, ports are working. I just booted ubuntu afterwards to do a quick benchmark. The Card runs pretty stable, even the fan is perfect powered, spins up/down together with workload like it shoud.


Next: Finally testing it in Mac Pro Smiley
Edit: Works fine in Mac Pro 1,1. Bootscreen baby. Detected by OS too.



* powercolorHD5870PC.rom (128 KB - downloaded 3 times.)
* ASUSHD5870RefbyBIHOmac.rom (128 KB - downloaded 3 times.)
« Last Edit: July 19, 2018, 09:25:38 AM by Traace » Logged
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