20 Jun
2016
20 Jun
'16
4:43 a.m.
On Mon, Jun 20, 2016 at 07:12:35AM -0400, Noel Chiappa wrote:
[...]
Although how a monitor is supposed to tell whether a
signal is interlaced, or
non-interlaced, is not clear - there's certainly no pin on the VGA connector
which says so! :-)
It's encoded in the sync signal. The timings are tweaked such that the beam of
a dumb CRT will be pushed down a half-line on alternate fields.