BIOS protection by Holly

[OzOnE]

I keep seeing this "interesting" Word value too (0x42FE, from the MESS source)...

Код:

    // The following is required to unlock the GD-ROM. The original Japanese BIOS doesn't need it
    case GD_UNLOCK:
        if (data==0 || data==0x001fffff || data==0x42fe)
        {
//          atapi_regs[ATAPI_REG_SAMTAG] = GDROM_PAUSE_STATE | 0x80;
            printf("Unlocking GD-ROM! %x\n", data);
        }
        break;
    }

Which seems to have been taken from "security_stuff.c".

Maybe 0x42fe is a seed value? Or probably just an arbitrary random number to request a GD Unlock syscall?