Loading a program in a boot sector

Hi
I have a boot sector program that I want to load another program from the disk.

Since free space on the 512KB Boot sector is limited, I want to go straight to the start of the data part of the disk (ignoring the FAT).

I want to load this file from disk into memory and then execute it.

Please note, this is in Real Mode.

1. How do I set aside some RAM and load it in (I know it's using Int13).

2. I'm not sure how to execute it, I know I take the CPU to it with a JMP Instruction, but I need some helpful advice.

I don't have a clue :(

Quote:

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Originally posted by VBTZH
I don't have a clue :(

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Then why did you post?

I collected some links:
http://nondot.org/sabre/os/files/Booting/nasmBoot.html
http://www.geocities.com/mvea/bootstrap.htm
http://www.omen.net.au/~philipm/dazi...rial/menu.html

In this order from least to most advantaged.
The first seems what you're searching for, the second scans the FAT of the floppy disk and the third seems to be pretty advanced, with much background information. It is incomplete (but bootstraps are explained).

BTW I think this is the bootstrap of linux 2.x
http://www.ibiblio.org/navigator-bin...oot/bootsect.S