dosmemgetl

Syntax

#include <sys/movedata.h>

void _dosmemgetl(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 long-word (32-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 count is the number of long-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.

Portability

not ANSI, not POSIX

Example

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

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