vga_getgraphmem(3) Svgalib User Manual vga_getgraphmem(3)
NAME
vga_getgraphmem - returns the address of the VGA memory
SYNOPSIS
#include <vga.h>
unsigned char *graph_mem; /* This declaration is already in vga.h */
unsigned char *vga_getgraphmem(void);
DESCRIPTION
returns a pointer to the 64K VGA frame buffer window. vga_setpage(3), vga_setreadpage(3) and vga_setwritepage(3) allow to select which
page of the VGA memory shows up at this position. vga_setlinearaddressing(3) maps all VGA memory at a consecutive memory area (if the
hardware supports it). In this mode, vga_getgraphmem() will return the location of this area too. You can also access the global variable
graph_mem, which will also contain this address.
Most demos, esp. vgatest(6) show the simple direct use of this function to access screen memory.
SEE ALSO
svgalib(7), vgatest(6), fun(6), testlinear(6), vga_setlinearaddressing(3), vga_claimvideomemory(3), vga_getmodeinfo(3), vga_setpage(3),
vga_setreadpage(3), vga_setwritepage(3),
AUTHOR
This manual page was edited by Michael Weller <eowmob@exp-math.uni-essen.de>. The exact source of the referenced function as well as of the
original documentation is unknown.
It is very likely that both are at least to some extent are due to Harm Hanemaayer <H.Hanemaayer@inter.nl.net>.
Occasionally this might be wrong. I hereby asked to be excused by the original author and will happily accept any additions or corrections
to this first version of the svgalib manual.
Svgalib (>;= 1.2.11) 27 July 1997 vga_getgraphmem(3)
