Note that GB Addr-Reg values are for the GB (not GBA), so the specifics may be different on the GBA.
| GBA Addr | GB Addr-Reg | old | Belogic | Tonc | Function (Belogic) |
|---|---|---|---|---|---|
| 0x04000060 | FF10-NR10 | SG10 | SOUND1CNT_L | SND1SWEEP | Sound 1 Sweep control |
| 0x04000062 | FF11-NR11 | SOUND1CNT_H | SND1CNT | Sound 1 Length, wave duty and envelope control | |
| 0X04000063 | FF12-NR12 | ||||
| 0x04000064 | FF13-NR13 | SG11 | SOUND1CNT_X | SND1FREQ | Sound 1 Frequency, reset and loop control |
| 0X04000065 | FF14-NR14 | ||||
| 0x04000068 | FF16-NR21 | SG20 | SOUND2CNT_L | SND2CNT | Sound 2 Length, wave duty and envelope control |
| 0X04000069 | FF17-NR22 | ||||
| 0x0400006C | FF18-NR23 | SG21 | SOUND2CNT_H | SND2FREQ | Sound 2 Frequency, reset and loop control |
| 0x0400006D | FF19-NR24 | ||||
| 0x04000070 | FF1A-NR30 | SG30 | SOUND3CNT_L | SND3SEL | Sound 3 Enable and wave ram bank control |
| 0x04000072 | FF1B-NR31 | SOUND3CNT_H | SND3CNT | Sound 3 Sound length and output level control | |
| 0X04000073 | FF1C-NR32 | ||||
| 0x04000074 | FF1D-NR33 | SG31 | SOUND3CNT_X | SND3FREQ | Sound 3 Frequency, reset and loop control |
| 0X04000075 | FF1E-NR34 | ||||
| 0x04000078 | FF20-NR41 | SG40 | SOUND4CNT_L | SND4CNT | Sound 4 Length, output level and envelope control |
| 0X04000079 | FF21-NR42 | ||||
| 0x0400007C | FF22-NR43 | SG41 | SOUND4CNT_H | SND4FREQ | Sound 4 Noise parameters, reset and loop control |
| 0X0400007D | FF23-NR44 | ||||
| 0x04000080 | FF24-NR50 | SGCNT0 | SOUNDCNT_L | SNDDMGCNT | Sound 1-4 Output level and Stereo control |
| 0X04000081 | FF25-NR51 | ||||
| 0x04000082 | SOUNDCNT_H | SNDDSCNT | Direct Sound control and Sound 1-4 output ratio | ||
| 0x04000084 | FF26-NR52 | SGCNT1 | SOUNDCNT_X | SNDSTAT | Master sound enable and Sound 1-4 play status |
| 0x04000088 | SGBIAS | SOUNDBIAS | SNDBIAS | Sound bias and Amplitude resolution control | |
| 0x04000090 | FF30 | WAVE_RAM0_L | WAVE_RAM0 | Sound 3 samples 0-3 | |
| 0x04000092 | FF32 | WAVE_RAM0_H | Sound 3 samples 4-7 | ||
| 0x04000094 | FF34 | WAVE_RAM1_L | WAVE_RAM1 | Sound 3 samples 8-11 | |
| 0x04000096 | FF36 | WAVE_RAM1_H | Sound 3 samples 12-15 | ||
| 0x04000098 | FF38 | WAVE_RAM2_L | WAVE_RAM2 | Sound 3 samples 16-19 | |
| 0x0400009A | FF3A | WAVE_RAM2_H | Sound 3 samples 20-23 | ||
| 0x0400009C | FF3C | WAVE_RAM3_L | WAVE_RAM3 | Sound 3 samples 23-27 | |
| 0x0400009E | FF3E | WAVE_RAM3_H | Sound 3 samples 28-31 | ||
| 0x040000A0 | FIFO_A_L | FIFO_A | Direct Sound channel A samples 0-1 | ||
| 0x040000A2 | FIFO_A_H | Direct Sound channel A samples 2-3 | |||
| 0x040000A4 | FIFO_B_L | FIFO_B | Direct Sound channel B samples 0-1 | ||
| 0x040000A6 | FIFO_B_H | Direct Sound channel B samples 2-3 |