The TimerWDT Function is included in the 86Duino IDE library beginning with Coding 211.
Please note that traditional watch dog API (wdt_enable()) from Arduino is also capable of being used with the 86Duino. This TimerWDT implementation provides the user with traditional watch dog functions as well as allows the user to use the callback functions in conjunction with the watchdog interrupt function as well as turning off the reset function or treating it as a normal time counter.
The text of the 86Duino reference is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.