PC Extra Super CD 1998 January/PCPLUS131.iso/DJGPP/V2/DJLSR201.ZIP/src/libc/pc_hw/mem/dmpl.txh

Text File | 1996-01-30 | 908 b | 37 lines

@node dosmemputl, memory
@subheading Syntax

@example
#include <sys/movedata.h>

void _dosmemputl(const void *buffer, size_t xfers unsigned long offset);
@end example

@subheading Description

This function transfers data from the program's virtual address space
to MS-DOS's conventional memory space, using only long-word (32-bit)
transfers.  The @var{offset} is a physical address, which can be
computed from a real-mode segment/offset pair as follows:

@example
offset = segment * 16 + offset;
@end example

The @var{xfers} is the number of long-words to transfer, and
@var{buffer} is a pointer to somewhere in your virtual address space
(such as memory obtained from @code{malloc}) where the data will come
from.

@subheading Return Value

None.

@subheading Example

@example
unsigned short save_screen[25][80];
dosmemputl(save_screen, 0xb8000, 40*25);
@end example