boot sector

From: Sean 'Captain Napalm' Conner <spc_at_conman.org>
Date: Tue Jan 22 09:12:44 2002

It was thus said that the Great Golemancd_at_aol.com once stated:
>
> can anyone tell me if they can see the bug in this boot sector.
> i cant seem to get it to work.
>
>
> .386
> .model tiny
>
> option segment:use16
>
> cseg segment para public 'code'
> startt:
> mov ax,4000h
> mov ds,ax
> mov bx,0h
> mov bp,0300h ;setup far pointer
>
> mov word ptr ds:[bp],bx ;move from 0000:7c00 to 07c0:0000
> mov bx,7c0h
> mov word ptr ds:[bp]+2,bx
> jmp dword ptr ds:[bp]

  Why are you doing this? Usually, most people physically move the code
somewhere else and then jump there, not just change the segment/offset
address to a physical equivilent.

  Also, you are getting into an infinite loop. The ``jump'' from 0000:7c00
(07c00) to 07c0:0000 (07c00) is taking you back to the start of the boot
sector.

> ;start of my code

  Which is never executed.

  -spc (Hope this helps ... )
Received on Tue Jan 22 2002 - 09:12:44 GMT