Table 4.9 Sound source register assignment
| Register name | Bit name |
| Loop control register | KYONEX, KYONB, SBCTL, SSCTL, SA, LSA, LEA, PCM8B, LPCTL |
| EG register | EGHOLD, AR, D1R, D2R, RR, DL, KRS, LPSLNK |
| FM modulation control register | SOUS, MDL, MDXSL, MDYSL, STWINH |
| Volume register | TL, SDIR |
| PITCH register | OCT, FNS |
| LFO register | LFORE, LFOF, ALFOWS, ALFOS, PLFOWS, PLFOS |
| MIXER register | IMXL, ISEL, DISDL, DIPAN, EFSDL, EFPAN, MVOL, DAC18B |
| Slot Status Register | MSLC, CA |
| Sound memory configuration register | MEM4MB |
| MIDI register | MIBUF, MIOVF, MIFULL, MIEMP, MOFULL, MOEMP, MOBUF |
| Timer register | TACTL, TIMA, TBCTL, TIMB, TCCTL, TIMC |
| Interrupt control register | SCIPD, SCIEB, SCIRE, SCILV0, SCILV1, SCILV2, MCIPD, MCIEB, MCIRE |
| DMA transfer register | DGATE, DDIR, DEXE, DMEA, DRGA, DTLG |