Since replacing an NE2000 ISA clone by an NE2000 PCI (Legato, with
a Winbond chip) clone the system locks up when using X.  The mouse
freezes and it is not possible to switch to another virtual terminal,
nor is it possible to telnet to the machine or to enter the kernel
debugger.  As far as I can tell there are no interrupt or I/O
conflicts.  In the configuration file I have:


#-- Machine
machine    "i386"
cpu        "I386_CPU"
cpu        "I486_CPU"
cpu        "I586_CPU"
cpu        "I686_CPU"
ident      TRUK

#-- Maxima
maxusers   16
options    "CHILD_MAX=128"
options    "OPEN_MAX=128"

#-- Options
options    USERCONFIG
options    VISUAL_USERCONFIG
options    BOUNCE_BUFFERS
options    "AUTO_EOI_1"
options    "AUTO_EOI_2"
options    INCLUDE_CONFIG_FILE
options    PERFMON

#-- Debugging
options    KTRACE
options    DDB
options    DDB_UNATTENDED

#-- Compatibility
options    "COMPAT_43"
options    COMPAT_LINUX
options    USER_LDT

#-- SysV
options    SYSVSHM
options    SYSVSEM
options    SYSVMSG

#-- Networking
options    INET
options    TCPDEBUG
options    IPFIREWALL
options    IPFIREWALL_VERBOSE
options    "IPFIREWALL_VERBOSE_LIMIT=100"
options    IPDIVERT

#-- Filesystems
options    FFS
options    NFS
options    MSDOSFS
options    "CD9660"
options    PROCFS

#-- Kernel
config     kernel  root on sd0 dumps on sd0

#-- Bus: PCI 
controller pci0

controller ahc0

controller scbus0
options    "SCSI_DELAY=8"
device     sd0
device     sd1
device     st0
device     cd0

device     ed1

#-- Bus: ISA
controller isa0

controller fdc0 at isa? port "IO_FD1" bio irq 6 drq 2 vector fdintr
disk       fd0  at fdc0 drive 0

device     sc0 at isa? port "IO_KBD" tty irq 1 vector scintr
options    "UCONSOLE"
options    "XSERVER"

device     npx0	at isa? port "IO_NPX" iosiz 0x0 flags 0x0 irq 13 vector npxintr

device     sio0 at isa? port "IO_COM1" tty irq 4 vector siointr
device     sio1 at isa? port "IO_COM2" tty irq 3 vector siointr

device     bdm0 at isa? port "IO_LPT1" tty

device     joy0 at isa? port "IO_GAME"
device     psm0	at isa? port "IO_KBD" conflicts tty irq 12 vector psmintr

device     ed0 at isa? port 0x300 net irq  5 vector edintr

device     pca0 at isa? port IO_TIMER1 tty

#-- Pseudo
pseudo-device   log
pseudo-device   loop
pseudo-device   ether
pseudo-device   sl 4
pseudo-device   ppp 4
pseudo-device   tun 4
pseudo-device   bpfilter 4
pseudo-device   pty 32
pseudo-device   snp 4
pseudo-device   vn
pseudo-device   speaker
pseudo-device   gzip

Fix: 

No idea either.
How-To-Repeat: 
No idea.