Apple Mac 5260/100 - Manual (Page 37)

Specifications Sound and Video - 10
Monitor Timings
640x480 Resolution
at 60 Hz
Horizontal Timing
Back porch: 96 dots
HSYNC: 64 dots
Front Porch: 64 dots
1 dot: 33.06878 ns
1 H: 28.5714 ms
1/dot: 30.24 MHz
Vertical Timing
Back porch: 39 H
VSYNCH: 3 H
Front Porch: 3 H
1 H: 28.5714 ms
1/H: 35.000 k Hz
1 V: 15.000 ms