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)