[gPXE] early print message

[Geert Stappers]

Op 20100411 om 20:05 schreef Geert Stappers:
> 
> --- a/src/arch/i386/prefix/mbr.S
> +++ b/src/arch/i386/prefix/mbr.S
> @@ -5,6 +5,15 @@
>         .org 0
>  
>  mbr:
> +       movb    $0x0e, %ah
> +       movb    $'N', %al
> +       int     $0x10
> +       movb    $'L', %al
> +       int     $0x10
> +       movb    $0x0d, %al
> +       int     $0x10
> +       movb    $0x0a, %al
> +       int     $0x10
>         movw    $exec_sector, %bp
>         jmp     find_active_partition
>  exec_sector:
> 

That prints "NL\r\n", NL for Next Level, because out of BIOS and in gPXE.
The carraige return plus line feed is for better readability.

It is the 'early print' that gives me the information that I wanted.

Not as pretty coded as original wanted, but it is good enough.


Cheers
Geert Stappers