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Nuvo-3100 Series User’s Manual
Copyright © 2014 Neousys Technology Inc. All Right Reserved.
Page 70 of 99
Chapter 4 BIOS and Driver
4.1 BIOS Settings
Nuvo-3100 series is shipped with factory-default BIOS settings cautiously programmed for
best performance and compatibility. In this section, we’ll illustrate some of BIOS settings
you may need to modify. Please always make sure you understand the effect of change
before you proceed with any modification.
4.1.1 COM1 & COM2 Operating Mode
COM1 and COM2 of Nuvo-3100 series support RS-232 (full-duplex), RS-422 (full-duplex)
and RS-485 (half-duplex) mode. You can set the COM1/COM2 operating mode via BIOS
settings. Another option in BIOS called “Slew Rate” defines how sharp the rising/falling
edge is for the output signal of COM1/COM2. For long-distance RS-422/485 transmission,
you may set the “Slew Rate” option as “High” to improve signal quality.
.
To set COM1/COM2operating mode:
1. When Nuvo-3100 boots up, press F2 to enter BIOS setup utility.
2. Go to [Advanced]
[Peripheral Configuration].
3. Set the [Set COM1 as] to a proper mode for COM1 of your Nuvo-3100.
4. Set the [Set COM2 as] to a proper mode for COM2 of your Nuvo-3100.