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.