VGA_BIOS_LEN
rom->size = VGA_BIOS_LEN;
bios = malloc(VGA_BIOS_LEN);
if (pread(fd, bios, VGA_BIOS_LEN, VGA_BIOS_ADDR) == -1)
if (write(romfd, bios, VGA_BIOS_LEN) == -1) {