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dosmemgetw
==========

Syntax
------

     #include <sys/movedata.h>
     
     void _dosmemgetw(unsigned long offset, size_t xfers, void *buffer);

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

This function transfers data from MS-DOS's conventional memory space to
the program's virtual address space, using only short-word (16-bit)
transfers.  The OFFSET is a physical address, which can be computed
from a real-mode segment/offset pair as follows:

     offset = segment * 16 + offset;

The XFERS is the number of words to transfer, and BUFFER is a pointer
to somewhere in your virtual address space (such as memory obtained
from `malloc') where the data will go.

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

None.

Example
-------

     unsigned short shift_state;
     dosmemgetw(0x417, 1, &shift_state);
     if (shift_state & 0x0004)
       /* Ctrl key pressed */;