AXIOMTEK SBC8232, User Manual

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SBC8232 386SX ISA Half-size CPU Card Family User’s Manual
Watchdog Timer
24
Watchdog Timer Examples
Setup watchdog timer time out value:
mov al,0ah
mov dx,70h
out dx,al
jmp short $+2
mov dx,71h
in al,dx
jmp short $+2
and al,0f0h
add ax,TimeValue ; TimeValue= 00h..0fh, reference as following
watchdog time out table
out dx,al
jmp short $+2
mov al, 0bh
mov dx, 70h
out dx, al
jmp short $+2
mov dx, 71h
in al, dx
jmp short $+2
or al, 08h
out dx, al
jmp short $+2