User guide

 COM Port I/O Address
COM Port I/O address
COM1 Base Address + 00H
COM2 Base Address + 08H
COM3 Base Address + 10H
COM4 Base Address + 18H
2.5 COM Port IRQ Selection
 JP2: COM4 IRQ setting,
 JP4: COM3 IRQ setting,
 JP1: COM2 IRQ setting,
 JP3: COM1 IRQ setting,
IRQ 1-2 3-4 5-6 7-8 9-10 11-12
13-14 15-16
3 ON OFF OFF OFF OFF OFF OFF OFF
4 OFF ON OFF OFF OFF OFF OFF OFF
5 OFF OFF ON OFF OFF OFF OFF OFF
7 OFF OFF OFF ON OFF OFF OFF OFF
9 OFF OFF OFF OFF ON OFF OFF OFF
10 OFF OFF OFF OFF OFF ON OFF OFF
11 OFF OFF OFF OFF OFF OFF ON OFF
12 OFF OFF OFF OFF OFF OFF OFF ON
Default Setting: COM1 - IRQ3, COM2 - IRQ4, COM3 - IRQ5,
COM4 - IRQ7.
2.6 IRQ sharing mode selection
 JP6: IRQ sharing mode selection
Mode 13-14 15-16
*Independent IRQ Mode ON ON
COM1~COM4 share 1
IRQ(assigned by JP3)
OFF ON
*: Default
13