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__dpmi_simulate_real_mode_procedure_iret
========================================

Syntax
------

     #include <dpmi.h>
     
     int __dpmi_simulate_real_mode_procedure_iret(__dpmi_regs *_regs);

Description
-----------

Please refer to DPMI Specification: for details on DPMI function   
call operation.  Also see DPMI Overview: for general information.   

DPMI function AX = 0x0303

This function switches to real mode, filling in *all* the registers
from the structure.  ss:sp and flags must be valid or zero.  The called
function must return with an `iret'.

Return Value
------------

-1 on error, else zero.