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NEXCOM NISE 90 User Manual

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53

NISE 90 User Manual

Appendix C: Watchdog Timer

out

2fh, al

ret
TimeBaseWDT ENDP

===============================================
TimeCountWDT PROC

mov

al, 73h ;WDT Time-out register.

out

2eh, al

mov

al, 03h ;Here!! Set count 3.

out

2fh, al

ret
TimeCountWDT ENDP

===============================================
ExitSetup

PROC

mov

al, 02h

out

2eh, al

mov

al, 02h

out

2fh, al

ret
ExitSetup

ENDP

===============================================

===============================================
SetupWDT PROC

mov

dx, 2eh

mov

al, 087h

out

dx, al

nop
nop

mov

al, 01h

out

dx, al

nop
nop

mov

al, 55h

out

dx, al

nop
nop

out

dx, al

;Write operations to special address

port (2E) for entering MB PnP Mode.

mov

al, 07h

out

2eh, al

mov

al, 07h ;Select logical device for Watch Dog.

out

2fh, al

ret
SetupWDT ENDP

===============================================
TimeBaseWDT

PROC

mov

al, 72h

out

2eh, al

mov

al, 10h ;Set WDT reset upon PWROK

or

al, 80h ;Here!! set 80h for second, set 00h for minute