vga_waitretrace - wait for vertical retrace.
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
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).
This manual page was edited by Michael Weller
<email@example.com>. 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
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.