A little more on this:

In troubleshooting, I didn't think to try pulling the cable (duh).  That
gets the machine past the 'setting tty flags'. 

So, it seems any attempt to control the serial port with the printer
hooked up causes the problem.

By the way, this machine does speak to this printer just fine on the
same cable using MacOS, so I'm pretty certain my hardware is in order.


Paul Forgey wrote:
> 
> I'm attempting to get a printer working on my IIci running 1.3.
> However, any attempt to access tty00 or tty01 causes the system to
> freeze-- hard.  I have to power the machine off to reboot.
> 
> After trying without success to get the machine speaking to my printer
> at all, I backed out my work in /etc/printcap, but now, when the machine
> wants to go multi user, even before thinking about firing up lpd, the
> boot sequence locks up at 'setting tty flags'.
> 
> Any suggestions?  Right now, my machine refuses to boot multiuser.
> 
> Thanks