XtendLan TC-965, Руководство пользователя

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Appendix 2
：
Watchdog programmer guide
watchdog reference code
（
ASM
）
:
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Set the port to realize watchdog function through DEBUG order, so that it can carry out
Watchdog Timer
’s various functions.
port instruction
：
2EH
：
Address register
2FH
：
Data register
Example
：
Set Watchdog Timer for 48 Seconds, DEBUG in DOS
：
C:\>debug
-o 2e 87
-o 2e 87 ; Decode
-o 2e 2b
-o 2f e0 ; bit4=0, Select watchdog pin
-o 2e 07
-o 2f 08 ; Choose register
-o 2e 30
-o 2f 01 ; Activation logic devices
-o 2e f5
-o 2f 00 ; Set timer units as second / (set as min: o 2f 08)
-o 2e f6
-o 2f 30 ; Set Timer Count to 48 sec. (Max support FF = 255, when it set as 00
Watchdog function stop
-o 2fe aa ; locked register
-q
C:\>
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