Sorry, but I am quite sure that you will not be able to successfully flash a memory chip of your video card using the flashrom's Internal flashing mode, especially on a Mac: even the internal flashing of its' own BIOS chip is likely not supported (if a chipset isn't) and could result in a (software) bricking. So, most likely you'll have to use the external flashing adapter, like USB CH341A, which hopefully could be connected to a memory chip of your video card using a test clip (to avoid the soldering). Then, the command line will look like
sudo ./flashrom -p ch341a_spi -r dump.bin -V
And you could find an example of flashing setup here: http://dangerousprototypes.com/docs/Flashing_a_BIOS_chip_with_Bus_Pirate#CH3...
I am sending a copy of this e-mail to a flashrom mailing list, just in case someone would see a mistake in my message and would like to clarify or add some useful info.
Best regards, Mike
On Thu, Sep 5, 2019 at 10:39 PM Ray Nygren email@example.com wrote:
Sorry for the misunderstanding. I have flashrom install on mac pro correctly. I am not flahing mac pro rom its the AMD RX580 Video card which has a mistake in the ROM bios that need updated to make it compatable with Mac as the pre graphics screen is blank I attached the link in the reques you replied to on the fix My question to forum is:
- what is the arg to dump list of roms seen.
- need to identify and dump rom from RX580 video card
- edit 5 bytes and flash video card rom
If you are not able to help please forward to anyone who can assist me. Thanks
Sent: Monday, September 02, 2019 at 6:26 AM From: "Mike Banon" firstname.lastname@example.org To: email@example.com, flashrom firstname.lastname@example.org Subject: Re: [flashrom] Mac Pro Mojave with AMD RX580 need to fix ROM for boot screen. Are you trying the internal flashing mode? If a Mac Pro chipset is not supported by a flashrom, it wouldn't be successful. You might need the external flashing: get a hardware programmer like CH341A, find a ROM chip at RX 580 motherboard, try to connect CH341A to a chip using some test clip which is compatible with a chip (make sure this chip supports 3.3V since there are some flash chips that are 1.8V), and try. This is how I would have tried to do it.
On Fri, Aug 30, 2019 at 9:45 PM email@example.com wrote:
I found a link to correct the problem that many people have but no one has completed with flashrom on Mac they e 580 from Mac Pro then insert to PC to use flash program, I would like to try to do all on MAC usin flash rom. I was able to complete install brew then flashrom but now am overwelmened by manual here is the link with fix https://forums.macrumors.com/threads/turn-a-new-sapphire-rx580-pulse-into-th...
I need arguments to dump rx580 ROM to file copy to backup edit changes save file flash rx580 card
What args should I use to dump to file and then flash _______________________________________________ flashrom mailing list -- firstname.lastname@example.org To unsubscribe send an email to email@example.com