diff options
| author | YamaArashi <shadow962@live.com> | 2015-08-08 22:32:44 -0700 |
|---|---|---|
| committer | YamaArashi <shadow962@live.com> | 2015-08-08 22:32:44 -0700 |
| commit | 2b018159997e3b580efd114ff4e3548a0de3cbc5 (patch) | |
| tree | c43e657b2b5734db05e01fe31e1cb12c4fa987ad /constants | |
| parent | 40c1ecb4374a83d9511fe2c5fa99704d9cfc521b (diff) | |
commented audio code
Diffstat (limited to 'constants')
| -rw-r--r-- | constants/hardware_constants.asm | 1 | ||||
| -rw-r--r-- | constants/music_constants.asm | 39 |
2 files changed, 39 insertions, 1 deletions
diff --git a/constants/hardware_constants.asm b/constants/hardware_constants.asm index f9e3fe19..21a3ad93 100644 --- a/constants/hardware_constants.asm +++ b/constants/hardware_constants.asm @@ -107,4 +107,3 @@ rUNKNOWN5 EQU $ff75 ; (8Fh) - Bit 4-6 (Read/Write) rUNKNOWN6 EQU $ff76 ; (00h) - Always 00h (Read Only) rUNKNOWN7 EQU $ff77 ; (00h) - Always 00h (Read Only) rIE EQU $ffff ; Interrupt Enable (R/W) - diff --git a/constants/music_constants.asm b/constants/music_constants.asm index f239acea..57ad230d 100644 --- a/constants/music_constants.asm +++ b/constants/music_constants.asm @@ -1,3 +1,42 @@ +; 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 + +MAX_SFX_ID EQU $B9 + +CRY_SFX_START EQU $14 +CRY_SFX_END EQU $86 + +; wChannelFlags1 constants +BIT_PERFECT_PITCH EQU 0 ; controlled by toggleperfectpitch command +BIT_CHANNEL_CALL EQU 1 ; if in channel 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_BEND_ON EQU 4 ; if pitch bend is active +BIT_PITCH_BEND_DECREASING EQU 5 ; if the pitch bend frequency is decreasing (instead of increasing) +BIT_ROTATE_DUTY EQU 6 ; if rotating duty + +; wChannelFlags2 constant (only has one flag) +BIT_EXECUTE_MUSIC EQU 0 ; if in execute music + ; Song ids are calculated by address to save space. music_const: MACRO |