NAME

       vga_setreadpage - set the 64K SVGA page number

SYNOPSIS

       #include <vga.h>

       void vga_setreadpage(int page);

DESCRIPTION

       Usually  SVGA  cards  have  more  than  the  64K memory which suffice for an ordinary VGA.
       However, the  memory  window  mapped  at  vga_getgraphmem(3)  is  only  64K  bytes  large.
       vga_setreadpage() selects the page-th 64K memory chunk to be visible for reads at position
       vga_getgraphmem(3).

       vga_setwritepage(3) allows a different 64K memory chunk to be modified by writes  to  this
       memory  window. This is a very useful feature for screen to screen pixmap copies. However,
       not all cards support this in all graphics mode. Check vga_modeinfo(3)  for  availability.
       Esp. as this feature can also not be used when in background mode.

       Of  course, this function must be used in conjunction with vga_setwritepage(3) but may not
       be used in conjunction with vga_setpage(3).

SEE ALSO

       svgalib(7),  vgagl(7),  libvga.config(5),  fun(6),  vgatest(6),   vga_claimvideomemory(3),
       vga_getgraphmem(3),       vga_modeinfo(3),       vga_setpage(3),      vga_setwritepage(3),
       vga_setlinearaddressing(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.