Aaeon PCM-8500, Quick Installation Manual

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Compact Board P C M - 8 5 0 0
Appendix A Programming the Watchdog Timer
A-8
MOV AL,21h
CALL Read_Configuration_Data
CMP AL,12h
JNE Not_Initial
Need_Initial:
STC
RET
Not_Initial:
CLC
RET
Check_Chip ENDP
Read_Configuration_Data PROC NEAR
MOV DX,WORD PTR CS:[C04h]
OUT DX,AL
MOV DX,WORD PTR CS:[C06h]
IN AL,DX
RET
Read_Configuration_Data ENDP
Write_Configuration_Data PROC NEAR
MOV DX,WORD PTR CS:[C04h]
OUT DX,AL