ICS Endeavor Plus 931-0000-03-A User Manual page 112

Step 3 . Exit extended function mode
REMARK:
**** I/O PORT 3F0h --> Index port for programming CR .
**** LD8-CRF2-P02h : Program CR index F2h of Logical Device 8
A-8 WDT Programming
MOV DX,3F0H
MOV AL,0AAH
OUT DX,AL
3F1h --> Data port for programming CR .
with the value "02h" .