shithub: pokered

ref: f60ee848e8d5adff0ec77023e8aeb848f6678c45
dir: /constants/audio_constants.asm/

; 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