murray@pa.dec.com said:
> I tried using /dev/ttyC0 and /dev/ttyC1 but didn't get anywhere.  

I'm not using the serial lines for more than as system console
connection on my Miata, but ttyC* should work.

For comparision the boot log:
isa0 at sio0
com0 at isa0 port 0x3f8-0x3ff irq 4: ns16550a, working fifo
com0: console
com1 at isa0 port 0x2f8-0x2ff irq 3: ns16550a, working fifo
alpha_shared_intr_establish: isa irq 3: warning:
 using edge-triggered on level-triggered

And the /dev files:
bash$ ls -l ttyC*
crw-------  1 uucp  wheel  26, 0 Jan 18  1998 ttyC0
crw-------  1 uucp  wheel  26, 1 Jan 18  1998 ttyC1

Handshake problems? Have a "local" in /etc/ttys?

best regards
Matthias