The 265SXB comes with eight programmable timers, numbered TO to T7. Of these, only T7 is only really freely available to the user.
| Timer | Name | Function | At boot | Clock |
|---|---|---|---|---|
| T0 | Watchdog | Breaks infinite loops | off | (TBA) |
| T1 | General purpose | Interrupts for time-of-day clock | on | CLK |
| T2 | (TBA) | Can provide regular interrupts | (TBA) | FCLK/16 |
| T3 | Baud rate generator | Services UARTs | on | (TBA) |
| T4 | Baud rate generator | Serivces UARTs | on | FCLK or P60 |
| T5 | Tone generator | Telephone applications | (TBA) | FCLK |
| T6 | Tone generator | Telephone applications | (TBA) | FCLK |
| T7 | (TBA) | Can provide interrupts | off | FCLK |
T4 can count pulses on P60/TIN if not used as a baud rate generator, and provide square wave reference on P61/TOUT.
T7 can generate timer interrupts via TIFR or used for pulse width measurement (PWM).
The time-of-day clock (TOD) is updated in one-second intervals by software. There is no RTC chip on the 265SXB. In low-power mode (invoked, for example, by pressing "x" in the Mensch Monitor), the date and time are not lost, but they are also not updated.
The clock starts up immediately on boot with "12:00:00" as the "current" time. To see the time and change it, type "t". The Mensch Monitor will prompt you to type in a new time. Hitting ENTER will keep the old time.
The "current" date is "07-01-93" (note to non-American users: This format is "Month-Day-Year"). To see the date and change it, type "n". As with the time, the Monitor will prompt you to change it by typing a similiar string.