Otherwise, checksum_far is getting called with zero as the length parameter, and the ROM checksum in the header end up beeing zero after vga_post() is called. Signed-off-by: Julian Pidancet <julian.pidancet@gmail.com> --- vgasrc/vgabios.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/vgasrc/vgabios.c b/vgasrc/vgabios.c index 58e467d..c1b10c1 100644 --- a/vgasrc/vgabios.c +++ b/vgasrc/vgabios.c @@ -1255,6 +1255,7 @@ vga_post(struct bregs *regs) // Fixup checksum extern u8 _rom_header_size, _rom_header_checksum; SET_VGA(_rom_header_checksum, 0); - u8 sum = -checksum_far(get_global_seg(), 0, _rom_header_size * 512); + u8 sum = -checksum_far(get_global_seg(), 0, + GET_GLOBAL(_rom_header_size) * 512); SET_VGA(_rom_header_checksum, sum); } -- Julian Pidancet