Hi!
I am using flashrom V1.1 on Darwin and successfully read and wrote the vBIOS of a AMD WX4170 card having the chip listed below. The read and write log files have been attached.
The graphics card booted in my iMac so I assume that writing the flash succeeded. I am not using the latest development version, it just worked.
Hope this helps…
Wolf
flashrom v1.1 on Darwin 19.3.0 (x86_64) flashrom is free software, get the source code at https://flashrom.org
Calibrating delay loop... OK. Found GigaDevice flash chip "GD25Q40(B)" (512 kB, SPI) on ch341a_spi. === This flash part has status UNTESTED for operations: PROBE READ ERASE WRITE The test status of this chip may have been updated in the latest development version of flashrom. If you are running the latest development version, please email a report to flashrom@flashrom.org if any of the above operations work correctly for you with this flash chip. Please include the flashrom log file for all operations you tested (see the man page for details), and mention which mainboard or programmer you tested in the subject line. Thanks for your help! Reading flash... done.
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Wolf Dieter Brandt