Merge pull request #257 from Rangi42/master

More reorganization

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