INSTALL REAL-MODE IDT DO THE VGA BIOS found VGA: vid=1106, did=3122 rom base, size: fffc0000 BAD SIGNATURE 0x8 0x1e
I missed this earlier. This indicates that the loader do_vgabios() was unable to find the bios extension signature of 0xAA55 using the base offset of 0xfffc0000. Your video bios was _NOT_ copied to ram.
biosint: # 0x10, eax 0x4f14 ebx 0x18003 ecx 0x1 edx 0x0 biosint: ebp 0x17fa8 esp 0xffa edi 0x0 esi 0xffff70b6 biosint: ip 0x8e22 cs 0x0 flags 0x46 BIOSINT: Unsupport int #0x10
This is probally the result of vga_enable_console() which is called regardless of what happens in do_vgabios() so I think its just running bogus code.
Your rom image does not have the vga bios located correctly. You must locate the video bios in your ROM image such that it will get referenced at 0xfffc0000.
For a ROM image that is 256k in size that means you need a 64k VGA bios image located at offset 0x0. The linuxbios image can then start at offset 0x10000.
If you do a 'hd' on your ROM image file the very first word you see should be 0x55aa which is the 0xaa55 rom signature in little endian.
Since the build system should have done all this for you I'm guessing that your vga bios image is not valid.
-- Richard A. Smith