ADLO: linuxbios v1 hangs after jumping to boot code at 0x7c00

[Simon Xin Cheng]

I am trying to use ADLO + video bios to enable VGA support for my EPIA 800
board. Unfortunately, the code hangs after the elfboot "Jumping to boot
code at 0x7c00 "

According to ADLO document, I enabled the original bios shadow from C0000
to DFFFF and capture the vedio bios by:

dd if=/proc/kcore of=/usr/src/video.bios.bin bs=1 count=65536 skip=790528

Program headers of the /proc/kcore is:
 Program Headers:
  Type           Offset   VirtAddr   PhysAddr   FileSiz MemSiz  Flg Align
  NOTE           0x000094 0x00000000 0x00000000 0x006bc 0x00000     0
  LOAD           0x8001000 0xc8000000 0x00000000 0x37fee000 0x37fee000 RWE
0x1000
  LOAD           0x001000 0xc0000000 0x00000000 0x77f0000 0x77f0000 RWE
0x1000

Then I make payload and romimage.

Is there anything wrong with my procedure?

By the way, how to debug ADLO?

Simon Cheng
www.msica.com