[godd2]

The bitrate of the PCM is determined based on how quickly you can write a byte to the register. The fastest you could write general data is once every 6 cycles, which gives ~298 MHz of sample rate, so 44.2 kHz is easily doable if that's all you want to do with the CPU.

[junon]

Do you mean 298 KHz? I thought the 6502 on the NES was slightly over 1MHz