[coreboot] Help required to boot DUET (Seabios floppy mechanism)

Kevin O'Connor kevin at koconnor.net
Sat Oct 26 16:31:10 CEST 2013


On Thu, Oct 24, 2013 at 12:17:33AM -0500, Scott Duplichan wrote:
> Scott Duplichan wrote:
> 
> <..snip..>
> 
> ]I have no experience with making SeaBIOS boot an embedded floppy
> ]image. I may be able to give this a try, but I would have to first overcome 
> ]Windows build problems that have crept into both SeaBIOS and coreboot.
> 
> I tested the SeaBIOS virtual floppy boot with EDK2 Duet and it worked
> for me. I tested with the ASRock e350M1 project. Here is the cbfstool
> output:

Thanks for confirming.

> scott at p67-2600k /D/coreboot/win-build-env-011/coreboot/build
> $ cbfstool.exe coreboot.rom print
> coreboot.rom: zd kB, bootblocksize 4096, romsize 1008, offset 0x400000
> alignment: 0 bytes
> 
> Name                           Offset     Type         Size
> cmos_layout.bin                0x0        cmos_layout  1776
> pci1002,9802.rom               0x740      optionrom    57856
> fallback/romstage              0xe980     stage        345432
> fallback/coreboot_ram          0x62f40    stage        203312
> fallback/payload               0x949c0    payload      53738
> config                         0xa1c00    raw          3831
> (empty)                        0xa2b40    null         3526744
> 
> scott at p67-2600k /D/coreboot/win-build-env-011/coreboot/build
> $ cbfstool.exe coreboot.rom add -f /d/duetfloppy.img -n floppyimg/duetfloppy.img -t raw

FYI, it's also possible to add an lzma compressed image (make sure the
cbfs filename ends in ".lzma" then).

-Kevin



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