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Chapter 5 Jumper Settings and Connectors
59
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 5-13: PPC-120/140 serial port default settings
Port Address Range Interrupt
COM1 3F8 ~ 3FF IRQ4
COM2 2F8 ~ 2FF IRQ3
COM3 3E8 ~ 3EF IRQ10
COM4 2E8 ~ 2EF IRQ5
5.3.2 COM3/COM4/RI pin setting (JP2, JP1) (Reserved)
Table 5-14: COM4/RI pin setting (JP2)
+5 V output +12 V output * RI output
* default setting
Table 5-15: COM3/RI pin setting (JP1)
+5 V output +12 V output * RI output
* default setting
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