At/Atx Input Power Select (Jsatx1); Serial Port 1 In Rs-232/422/485 Mode (Jcom_Sel1) - Avalue Technology ARC-1238 Quick Reference Manual

2.5.3

AT/ATX Input power select (JSATX1)

* Default
2.5.4

Serial port 1 in RS-232/422/485 mode (JCOM_SEL1)

* Default
RS232*
PIN Signal
12 422RX1-
9 485_422TX1+
6 422RX1+
3 485_422TX1-
Note:
This connector is available after modify the mode of COM1 in
BIOS setting.
ARC-1238 Quick Reference Guide 21
Quick Reference Guide
ATX*
AT
RS422 RS485
PIN Signal PIN Signal
11 COM1-4 10 NDTRA#
8 COM1-2 7 NRXDA
5 COM1-3 4 NTXDA
COM1
2 1 NDCDA#
-1