Date: Thu, 3 Mar 94 01:30:58 EST
From: peprbv AT cfa0 DOT harvard DOT edu (Bob Babcock)
To: mmoss AT panix DOT com
Cc: djgpp AT sun DOT soe DOT clarkson DOT edu
Subject: Re: Proper way to interrupt???
Reply-To: babcock AT cfa DOT harvard DOT edu

> The old way:	set AX,BX,CX, etc...
> 		INT	10h	(or whatever...)
> The DJGPP way:	?????

#include <dpmi.h>
#include <go32.h>
_go32_dpmi_registers go32_regs;
memset(&go32_regs, 0, sizeof(go32_regs));
go32_regs.x.ax=...;
_go32_dpmi_simulate_int(0x10, &go32_regs);

It is important to either zero out the registers or else set up a valid stack
to be used in real mode.  If you forget, a few random bytes in DOS get
corrupted; makes for fun debugging.  If the interrupt you are executing needs
to access memory, you need to allocate DOS memory and copy data to/from that
memory using dosmemget and dosmemput.