User manual

POC-175 User Manual 72
However, if you wish to disable the port or change these parameters later
you can do this in the system BIOS setup. The table overleaf shows the
default settings for the panel PC’s serial ports. COM1 and COM2 are one
set. You can exchange the address range and IRQ of COM1 for the
address range and IRQ of COM2. After exchanging, COM1's address
range is 2F8 ~ 2FF and its IRQ is IRQ3: and COM2's address range is
3F8 ~ 3FF and its interrupt IRQ is IRQ4. and COM3 are another set.
Their selectable function is the same as the COM1/COM2 set.
Table B.3: Serial port default settings
B.3.2 COM1/COM2/COM3 Pin9 Output Type Setting (JP4/
JP6/JP5)
Figure B.5: COM port Pin9 configuration
Port No. IO Address Range Interrupt Request
COM1 3F8~3FF IRQ4
COM2 2F8~2FF IRQ3
COM3 3E8~3EF IRQ10