Yamaha V9938 Programmer's Manual page 32

The NTSC timing data is provided in the table below.
Delay data (binary)
0 0 0 0
0 0 0 1
0 0 1 0
0 0 1 1
0 1 0 0
0 1 0 1
0 1 1 0
0 1 1 1
© 1985 ASCII CORP. / NIPPON GAKKI CO.
Time (ms) Delay data (binary)
0
166.9
333.8
500.6
667.5
834.4
1001.3
1168.2
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Time (ms)
1 0 0 0
1 0 0 1
1 0 1 0
1 0 1 1
1 1 0 0
1 1 0 1
1 1 1 0
1 1 1 1
© 2010-2015 Eugeny Brychkov
1335.1
1509.9
1668.8
1835.7
2002.6
2169.5
2336.3
2503.2