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552 B
552 B
Sega Master System
the predecessor to Genesis.
surely had better graphics than NES, but its sound (fairly weak, 4ch PSG with A-3 is a lowest tone) is subject of several jokes.
this console is powered by a derivative of the Texas Instruments SN76489.
effects
20xy
: set noise mode.x
controls whether to inherit frequency from hannel 3.- 0: use one of 3 preset frequencies (C: A-2; C#: A-3; D: A-4).
- 1: use frequency of channel 3.
y
controls whether to select noise or thin pulse.- 0: thin pulse.
- 1: noise.