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 */;

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