TL Electronic SlimLine PT 1082 Series, Service Manual, Page: 114 / 119

Appendix B Technical Summary
Page: B-14
Code example for watchdog timer
Enable and start watchdog timer, then set 30 seconds as the timeout interval.
------ Enter to extended function mode --------------------------------------------------------
Mov dx, 2eh
Mov al,
87h
Out dx, al
Out dx, al
------ Select Logical Device 8 of watchdog timer --------------------------------------------
Mov al, 07h
Out dx, al
Inc dx
Mov al,
08h
Out dx, al
------ Set second as counting unit --------------------------------------------------------------
Dec dx
Mov al, 0f5h
Out dx, al
Inc dx
In al, dx
And al, not
08h
Out dx, al
------ Set timeout interval as 30seconds and start counting ---------------------------------
Dec dx
Mov al,
0f6h
Out dx, al
Inc dx
Mov al,
30
Out dx, al
------ Exit the extended function mode --------------------------------------------------------
Dec dx
Mov al,
0aah
Out dx, al