Talk:APU/current

Looking at Visual 2A03 and e.g. the sq0_on and sq0_len nodes, it seems that disabling a channel doesn't touch the length counter at all. Rather, there are internal channel enable flags (eg. sq0_on) that get set when the length counter is initialized (presumably only for non-zero values, though I haven't checked) and cleared when either the length counter reaches zero or the channel is disabled. These are the flags you get back from $4015/read as well. Even if this page only describes "abstract APU operation", that's not any more complicated than the current version, so maybe the descriptions should be updated. -Ulfalizer (talk) 23:30, 28 April 2013 (MDT)