User:Ddribin/APU Sandbox
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APU Register Overview
| Address | Name | (Alt. Names?) | Function |
|---|---|---|---|
| $4015 | APUCR | APUFLAGS | APU Control Register |
| $4000 | SQ1CR | SQ1_ENV | Square 1 Control Register |
| $4001 | SQ1SW | SQ1_ENV | Square 1 Sweep |
| $4002 | SQ1LL | SQ1_LO | Square 1 Length Low |
| $4003 | SQ1LH | SQ1_HI | Square 1 Length High |
| $4004 | SQ2CR | Square 2 Control Register | |
| $4008 | TRICR | Triangle Control Register | |
| $400C | NOICR | Noise Control Register |
