| Function | Opcode | Description |
| Talarm()? | 288 (0x120) | Reads/sets a process alarm for the current process. |
| Tgetdate() | 42 (0x2A) | Returns the current GemDos date. |
| Tmalarm()? | ||
| Tgettime() | 44 (0x2C) | Returns the GemDos system time. |
| Tsetdate() | 43 (0x2B) | Sets the current GemDos date. |
| Tsetitimer()? | ||
| Tsettime() | 45 (0x2D) | Sets the current GemDos time. |