timing

<excuse>i'm a matlab newbie</excuse>
for a very simple timing test, change the lines
phase=(i/numFrames)*2*pi;
and
f=0.05*2*pi; % cycles/pixel
in DriftDemoOSX to
phase=mod(i,2)*pi+pi/2;
and
f=0; % cycles/pixel; % Gaussian blob,
and crank the frameRate up as high as it will go.
Depending on the accuracy of your Gamma correction, you should see either
nothing or, at worst, a faint gray blob. However, I frequently see flashes of
bright and dark Gaussian blobs, indicating the occasional dropped frame.
FWIW I'm using a BITS++ box to drive a SONY F520 at 120 Hz from a
PowerBook G4. Any suggestions?

js