User`s manual

Chapter 5 Jumper Settings and Connectors

COM1 and COM2 are one set. You can exchange the address range

and interrupt IRQ of COM1 for the address range and interrupt IRQ of

COM2. After exchanging, COM1's address range is 2F8 ~ 2FF and

its request IRQ is IRQ3: and COM2's address range is 3F8 ~ 3FF and

its interrupt IRQ is IRQ4.

COM3 and COM4 are another set. Their selectable function is the

same as the COM1/COM2 set.

Table 5-6: Serial port default settings

Port Address Range Interrupt

COM1 3F8 ~ 3FF IRQ4

COM2 2F8 ~ 2FF IRQ3

COM3 3E8 ~ 3EF IRQ10

COM4 2E8 ~ 2EF IRQ5

5.4.2 COM1 / COM2 pin 9 output type setting (JP9)

Table 5-7: COM1 / COM2 pin 9 output type setting (JP9)

*Normal operation +5 V output +12 V output

* default setting

Note: Pins 1, 3 and 5 are for COM1.

Pins 2, 4 and 6 are for COM2.