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__dpmi_set_descriptor_access_rights
===================================

Syntax
------

     #include <dpmi.h>
     
     int __dpmi_set_descriptor_access_rights(int _selector, int _rights);

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

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

DPMI function AX = 0x0009

This sets the rights of _SELECTOR to _RIGHTS.

     ---- ---- ---- ---X = 0=not accessed, 1=accessed
     ---- ---- ---- --X- = data: 0=read, 1=r/w; code: 1=readable
     ---- ---- ---- -X-- = data: 0=expand-up, 1=expand-down; code: 0=non-conforming
     ---- ---- ---- X--- = 0=data, 1=code
     ---- ---- ---1 ---- = must be 1
     ---- ---- -XX- ---- = priviledge level (must equal CPL)
     ---- ---- X--- ---- = 0=absent, 1=present
     ---X ---- ---- ---- = available for the user
     --0- ---- ---- ---- = must be 0
     -X-- ---- ---- ---- = 0=16-bit 1=32-bit
     X--- ---- ---- ---- = 0=byte granular (small) 1=page-granular (big)

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

-1 on error, else zero.