| Mnemonic | Description |
|---|---|
| RDRS | Request for drum settings |
| DRS | Drum settings |
| ROVS | Request for overall settings |
| OVS | Overall settings |
| RPRGM | Request for program |
| PRGM | Program |
| CODE | Machine code (8086 code or data for S950's RAM) |
| RCODE | Request for machine code |
| EXEC | Execute (call machine code or other subroutine) |
| RCAT | Request for program/sample name catalog |
| RSPRM | Request for sample parameters |
| SPRM | Sample parameters |
| SECRE | System exclusive common reception enable |
| SECRD | System exclusive common reception disable |
| Mnemonic | Description |
|---|---|
| RSD | Request sample dump |
| SD | Sample dump |
| ASD | Abort sample dump |
| NAKS | Not acknowledge sample block (request retransmission) |
| ACKS | Acknowledge sample block (or sample header) |