IBM All-in-One FC/Socket 370 Celeron, PCM-6890B manual How to set the watchdog timer

How to set the watchdog timer

1.Set register 30h of logical device 7 to 1 to activate the timer.

2.Write the desired counter value to register F2h of logical deivice

Logical Device 7 : Register number 30h (CR30) 00h : timer inactive

01h : timer active

Logicel Device 8 : Register number F2h (CRF2) 00h : Time-out Disable

01h : Time-out occurs after 32 seconds

02h : Time-out occurs after 1 minute 32 seconds

03h : Time-out occurs after 2 minute 32 seconds

04h : Time-out occurs after 3 minute 32 seconds

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FFh : Time-out occurs after 254 minutes 32 seconds

Appendix A Programming the Watchdog Timer 103