Acer M9N System User Manual page 90

To set up the duplex mode, refer to the section below that
corresponds to your operating system. For example, if you are
running Windows NT on a Novell network, choose the Windows NT
method.
Note that performance may suffer or your
adapter may not operate if your hub is not full
duplex and you configure the adapter to full
duplex. Leave the adapter on half duplex if
you are not sure what type of hub you are
connected to.
DOS ODI, NDIS 2.01 Clients
Edit the NET.CFG or PROTOCOL.INI file. Add to Link Driver section:
FORCEDUPLEX 2
SPEED 100 (or 10 if 10BASE-T)
NetWare server
In AUTOEXEC.NCF, Load E100B.LAN and add the following
statement (you must include the equal sign for servers):
FORCEDUPLEX=2
SPEED=100 (or 10 if 10BASE-T)
For more information, see the README file for NetWare servers.
4-14 User's Guide