2013/10/29 Haywood-Evans Matthew
I am presently looking at trying to get Coreboot up and running on an
ASUS F2A85-M system. I am however running into some issues.
Using a bus pirate and flashrom I first backed up the original bios,
then erased the chip and restored the bios to ensure I had the basic
read/write capability working and this all worked correctly.
My board came with AMI (U)EFI v5018.
I was able to erase, and write to, every part of the flash chip with
that particular version while leaving the chip in its socket.
v6404 wasn't that permissive anymore.
Then I proceeded to build a standard coreboot image using seabios as a
payload (using an external VGA card), leaving all the settings as
default apart from selecting the motherboard, upon writing this to the
flash and rebooting the machine I had no output from the VGA adapter and
nothing from the serial port.
SeaBIOS should run the optionrom that is present on/for the offboard GPU.
Next I removed the external VGA and followed the instructions at
taking a local copy of the VGA
bios and embedding that into the coreboot image, rebuilt and re-flashed
to get the same result as previous.
The APU's PCI ID ofcourse varies, these lines are there (in dmesg and
lspci -nn) when booting linux:
[ 0.047202] smpboot: CPU0: AMD A8-5500 APU with Radeon(tm) HD
Graphics (fam: 15, model: 10, stepping: 01)
00:01.0 VGA compatible controller : Advanced Micro Devices, Inc.
[AMD/ATI] Trinity [Radeon HD 7560D] [1002:9904]
After some investigation I created a serial ice image and loaded that,
this worked giving me a serial ice prompt on the COM port. Using this,
and the QEMU provided, I proceeded to try and run the bios files created
in the last two stages, in the serial ice I see a lot of reads (takes
about 20 mins) before it exits with Bad memory pointer and core dumps.
I have been building the coreboot images on a different machine to the
target (Core i7) but have rebuilt them with the crossgcc in case issues
with the development PC where causing the issue, however I got the same
I am now at a loss of where to go next to get this working and would
appreciate any insight.
The target system I am working on is
4GB Corsair Ram
What's the full name of that memory module? More important: what's its
One can confirm from coreboot's menu: mainboard -> DDR3 memory voltage
AMD A10 6800K FM2 CPU
Assuming that the PCI ID of the abovementioned APU is 1002:990c, *and
the sha1sum of the with dd from memory extracted VGA optionrom (while
the AMI software is booted) is
e8fd60fd8746ab7f1a997897807d3fdbd119bf7e*, I can provide a working