force half duplex with 3com 905b

Oscar Stiffelman
Mon Aug 24 20:29:21 1998


Does anyone know how to force half duplex mode with the 3com905b?  Is
there an options value I can set in the 3c59x.c file?

If I boot with the card connected to my switch, it autonegotiates and runs
at full duplex, but the performance is terrible.  If I unplug the card
from the switch and then reconnect it after booting, it runs at half
duplex with excellent performance.  Rather than unplug the card every time
I boot, I would prefer to force the card into half duplex.

I am running a PC164LX alpha machine with Alpha Bios and ARC Console (not


Oscar Stiffelman