NAME

       vga_waitretrace - wait for vertical retrace.

SYNOPSIS

       #include <vga.h>

       void vga_waitretrace(void);

DESCRIPTION

       Wait  for  vertical  retrace,  that  is when the video beam goes dark and returns from the
       bottom line to the top line. Useful to synchronize animation with monitor refresh.

       However, Linux is a multiuser OS, thus some  time  might  have  passed  already  when  the
       function returns. Also, not all cards support this in all modes (or with more or less good
       results).

SEE ALSO

       svgalib(7), vgagl(7), libvga.config(5), scrolltest(6),

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.