dosmemputb

Syntax

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

Description

This function transfers data from the program's virtual address space to MS-DOS's conventional memory space, using only byte (8-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 bytes to transfer, and buffer is a pointer to somewhere in your virtual address space (such as memory obtained from malloc) where the data will come from.

Return Value

None.

Portability

ANSI/ISO C	No
POSIX	No

Example

unsigned short save_screen[25][80]; _dosmemputb(save_screen, 0xb8000, 80*2*25);