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vga_waitretrace(3)	       Svgalib User Manual	      vga_waitretrace(3)

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 re-
     turns 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-es-
     sen.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 orig-
     inal  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_waitretrace(3)

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<https://man.freebsd.org/cgi/man.cgi?query=vga_waitretrace&sektion=3&manpath=FreeBSD+Ports+15.1.quarterly>

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