From:	HAHN MARKUS <681614 AT pcmail DOT rz DOT fht-esslingen DOT de>
Organization:	FHT-Esslingen
To:	djgpp AT sun DOT soe DOT clarkson DOT edu
Date:	Mon, 15 May 1995 10:35:12 MET
Subject:	real (mode) problem

Hello folks !

Sorry for that, but I have a simple (hope not stupid) question :

I use GCC for DOS and want to call an software interrupt via
the INT86() function. Unfort. the function needs a real mode
pointer in ES:DI.
I know that GCC runs in protected mode and leave the segmented
sh.. of the 8088 architecture behind :)
Who can I convert my prot.mode linear 32bit pointer in a
real mode SEG:OFS one to call the fucntion correctly ?
Or should I implement a special routine, that handles
the <1MB area ?


(e.g. : ... 
        #include <dos.h>    

        char *mess[]="Hello, world$"
        union REGS regs;
        
        regs.x.ax=0x0009;
        
        regs.x.es=      <----- ????       
        regs.x.di=
        
        int86x(0x21, &regs, &regs);
)

Hope you can help me ...

Thanx for all !

Markus from Germany

        
        

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