hi paul.


is there anything in the kernel configuration about it?

also, can you, from the prom, look at the device nodes and see if
you can find it somewhere?  eg:

ok cd /
ok ls
ffeb4c3c options
ffeb2aa8 fd@1,f7200000
ffea78f4 virtual-memory@0,0
ffea76e8 memory@0,0
ffea5e2c sbus@1,f8000000
ffea5dc8 auxiliary-io@1,f7400003
ffea5d60 interrupt-enable@1,f5000000
ffea5cfc memory-error@1,f4000000
ffea5c78 counter-timer@1,f3000000
ffea5c04 eeprom@1,f2000000
ffea5b90 audio@1,f7201000
ffea5aa0 zs@1,f0000000
ffea59fc zs@1,f1000000
ffea59ac openprom
ffea4a74 packages
ok cd zs@1,f0000000
ok ls
ok .properties
.properties ?
ok .attributes
address                  ff ee 90 00 
port-b-ignore-cd         
port-a-ignore-cd         
keyboard                 
device_type              serial
slave                    00 00 00 01 
intr                     00 00 00 0c 00 00 00 00 
reg                      00 00 00 01 f0 00 00 00 00 00 00 08 
name                     zs

(.properties is the "openfirmware" equivalent of .attributes. 
ofw also use "dev" rather than "cd").


anyway, you'll need to find a "zs" of some sort for it to work..