Re: Switch from protected mode to real mode

Why do you multi-post to so many groups? Better cross-post
so the reader of one group can also see the replies made in
other groups.
Really sorry about that.. im a little desperated here, i dont know
how to cross-post....


Are you sure you asking the correct questions?
In my head yes..,


Why do you want to call your subroutine by an INT
instruction instead of an "CALL" instruction? When you
use the call, you don't have to modify the interrupt
table.
Because i wouldn´t know how to tell the main program the address of my
routine...
I think I forgot to say that I dont have source code for this main
program... I am patching its EXE to make the int call...


Why do you want to switch to real mode? Write your
subroutine as protected mode routine and "call" it.
Because I know nothing about rotected mode.


Why do you want to do file io? Write your data to the
serial or parallel port (only a few io instruction, no
support of an OS needed) and use a second PC to store
the sent data stream.
I can´t. I have to save it to the har disk.

I just want to know the steps to switch to real mode and back to
protected mode...


.

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