I've installed 2.0 (release) on an API CS20 and built a new kernel
with -02 -mbwx options and no debugging/symbols options, but I'm
running into an ethernet device timeout with these warnings:

fxp1: WARNING: SCB timed out!
fxp1: WARNING: SCB timed out!
fxp1: WARNING: SCB timed out!
fxp1: WARNING: SCB timed out!
fxp1: device timeout

Name  Mtu   Network       Address              Ipkts Ierrs    Opkts Oerrs Colls
fxp0  1500  <Link>        00:02:56:00:0f:ad   365791     0   624268     0     0
fxp0  1500  10/24         10.0.0.6            365791     0   624268     0     0
fxp1  1500  <Link>        00:02:56:00:0f:ae   110082     0   100478     1     0
fxp1  1500  192.94.73/24  192.94.73.6         110082     0   100478     1     0
lo0   33136 <Link>                                30     0       30     0     0
lo0   33136 127/8         127.0.0.1               30     0       30     0     0

Here is info on the configuration (I'm not running multicpu):

NetBSD vinland 2.0 NetBSD 2.0 (sdf) #0: Fri Jan 14 18:17:47 UTC 2005  root@vinland:/var/src/usr/src/sys/arch/alpha/compile/sdf alpha

Here is what the top of my config looks like:

options         DEC_6600        # EV6:          264DP OEM Board
makeoptions     COPTS="-O1 -mbwx"
options         BUFCACHE="6"
#options      MULTIPROCESSOR
# Standard system options
options         KTRACE                  # System call tracing support
options         SYSTRACE                # System call vetting via systrace(1)
options         NTP                     # kernel PLL for NTP
# Diagnostic/debugging support options
#options        DIAGNOSTIC              # Cheap kernel consistency checks
options         DDB                     # kernel debugger
#makeoptions    DEBUG="-g"
#makeoptions    DEBUGLIST="pattern1 pattern2 ..."
#options        KGDB                    # Remote kernel GDB support
#options        KGDB_DEVNAME="\"com\""  # device to use for KGDB
#options        KGDB_DEVADDR=0x2f8      # at this address
#options        KGDB_DEVRATE=57600      # at this comm. rat