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Made a mistake above, 150kbs is 1X CD-Speed, the CD32 is 2X of course so you're capped at 300KBs.
Max framerate is based on the number of bitplanes eg
2 colours = 1BP
4 colours = 2BP
8 colours = 3BP
16 colours = 4BP
32 colours = 5BP
64 colours = 6BP
128 colours = 7BP
256 colours = 8BP
HAM6 and HAM8, as their name implies, are six bitplanes and eight bitplanes respectively.
The formula I posted above changes based on the number of bitplanes.
So
320x90x12 HAM6 = 320 * 90 * 12 * (6/8) = 253 KBs, that's well within CD playback limits.
320x90x12 HAM8 = 320 * 90 * 12 * (8/8) = 337 KBs, that's outside of CD playback limits.
Also you've got to take into account audio, at mono 11050HZ that's around 11kb per second that gets added to the total.
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