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vga_setwritepage(3)           Svgalib User Manual          vga_setwritepage(3)

NAME
       vga_setwritepage - set the 64K SVGA page number

SYNOPSIS
       #include <vga.h>

       void vga_setwritepage(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_setwritepage() selects the page-th 64K
       memory chunk to be visible for writes at position vga_getgraphmem(3).

       vga_setreadpage(3) allows a different 64K memory chunk to be modified
       by reads from this memory window. This is a very useful feature for
       screen to screen pixmap copies. However, not all cards support this in
       all graphics modes. 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_setreadpage(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_getgraphmem(3), vga_claimvideomemory(3), vga_modeinfo(3)
       vga_setpage(3), vga_setreadpage(3), vga_setlinearaddressing(3)

AUTHOR
       This manual page was edited by Michael Weller <[email protected]
       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 <[email protected]>.

       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_setwritepage(3)
Command Section