centos man page for vga_setreadpage

vga_setreadpage(3)						Svgalib User Manual						vga_setreadpage(3)

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_getgraph-
       mem(3) is only 64K bytes large.	vga_setreadpage() selects the page-th 64K memory chunk to be visible for reads at  position  vga_getgraph-
       mem(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.

Svgalib (>;= 1.2.11)						   27 July 1997 						vga_setreadpage(3)