APU Noise Channel Period Table

Discuss emulation of the Nintendo Entertainment System and Famicom.

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isosceles
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Joined: Sat Mar 08, 2014 12:59 pm

APU Noise Channel Period Table

Post by isosceles »

The wiki page for the APU noise channel has a "timer period" table (bits 0 - 3 of $400E): http://wiki.nesdev.com/w/index.php/APU_Noise

Do the values in this table indicate the period for the associated timer, or the period reload value for the timer divider, as defined here: http://wiki.nesdev.com/w/index.php/APU#Glossary
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rainwarrior
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Re: APU Noise Channel Period Table

Post by rainwarrior »

The table lists the period of the noise (as a CPU cycle count).

It is not any kind of "reload value". It's just a length of time that the output should spend on that sample.
isosceles
Posts: 17
Joined: Sat Mar 08, 2014 12:59 pm

Re: APU Noise Channel Period Table

Post by isosceles »

Great, thanks for the quick reply!
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