Hi again Sylvain, (remember me?)
On , Sylvain Lauzon wrote to Peter Louwen :
SL>  > INT 2F U - DOS 3.2+ - SET DISK INTERRUPT HANDLER
SL>  >         AH = 13h
SL>  >         DS:DX -> interrupt handler disk driver calls on
SL>  > read/write
SL>  But my main idea was to scan whole INT 2F for a free hole. So, isn't a
SL> good
SL>  thing. It is standard if i scan C0h-FFh for a free hole? Or do i need to
SL> jump
The usual proceedure for handling this is....
install portion...
Get interupt vectors for the original interupt (the one your gonna replace).
Save these values.
interupt portion.... (IE: interupt is called)
The new interupt handler checks to see if it is a call for it's specific
code. If the interupt is not for it, then setup the stack, far call the
"old saved" interupt vectors.
In other words... chain the interupt...
g.
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