diff options
Diffstat (limited to 'constants/audio_constants.asm')
| -rw-r--r-- | constants/audio_constants.asm | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/constants/audio_constants.asm b/constants/audio_constants.asm new file mode 100644 index 00000000..38719f92 --- /dev/null +++ b/constants/audio_constants.asm @@ -0,0 +1,59 @@ +; pitch + const_def + const C_ ; 0 + const C# ; 1 + const D_ ; 2 + const D# ; 3 + const E_ ; 4 + const F_ ; 5 + const F# ; 6 + const G_ ; 7 + const G# ; 8 + const A_ ; 9 + const A# ; A + const B_ ; B + +; channel + const_def + const Ch1 ; 0 + const Ch2 ; 1 + const Ch3 ; 2 + const Ch4 ; 3 + const Ch5 ; 4 + const Ch6 ; 5 + const Ch7 ; 6 + const Ch8 ; 7 + +; HW sound channel register base addresses +HW_CH1_BASE EQU (rNR10 % $100) +HW_CH2_BASE EQU ((rNR21 % $100) - 1) +HW_CH3_BASE EQU (rNR30 % $100) +HW_CH4_BASE EQU ((rNR41 % $100) - 1) + +; HW sound channel enable bit masks +HW_CH1_ENABLE_MASK EQU %00010001 +HW_CH2_ENABLE_MASK EQU %00100010 +HW_CH3_ENABLE_MASK EQU %01000100 +HW_CH4_ENABLE_MASK EQU %10001000 + +; HW sound channel disable bit masks +HW_CH1_DISABLE_MASK EQU (~HW_CH1_ENABLE_MASK & $ff) +HW_CH2_DISABLE_MASK EQU (~HW_CH2_ENABLE_MASK & $ff) +HW_CH3_DISABLE_MASK EQU (~HW_CH3_ENABLE_MASK & $ff) +HW_CH4_DISABLE_MASK EQU (~HW_CH4_ENABLE_MASK & $ff) + +REG_DUTY_SOUND_LEN EQU 1 +REG_VOLUME_ENVELOPE EQU 2 +REG_FREQUENCY_LO EQU 3 + +; wChannelFlags1 constants +BIT_PERFECT_PITCH EQU 0 ; controlled by toggle_perfect_pitch command +BIT_SOUND_CALL EQU 1 ; if in sound call +BIT_NOISE_OR_SFX EQU 2 ; if channel is the music noise channel or an SFX channel +BIT_VIBRATO_DIRECTION EQU 3 ; if the pitch is above or below normal (cycles) +BIT_PITCH_SLIDE_ON EQU 4 ; if pitch slide is active +BIT_PITCH_SLIDE_DECREASING EQU 5 ; if the pitch slide frequency is decreasing (instead of increasing) +BIT_ROTATE_DUTY_CYCLE EQU 6 ; if rotating duty cycle + +; wChannelFlags2 constant (only has one flag) +BIT_EXECUTE_MUSIC EQU 0 ; if in execute music |