> 	Setting tty flags.
	> 	data fault: pc=1238f8c addr=48 sfsr=800809<ASI=80,ASI,W>
	> 	kernel trap 30: data access exception
	> 	Stopped in pid 34 (ttyflags) at zsopen+0x4c:	ldx		[%o0 + 
	0x48, %l1
	> 	db> t
	> 
	> That's very strange.  Ultra 5s don't have zs chips.

	Well, it's dying when "ttyflags -a" runs, and that open()'s /dev/console,
	then /dev/ttya and /dev/ttyb, so I can only assume that the open() of
	either ttya or ttyb is causing that to happen somehow, even if my Ultra 5+
	doesn't have any zs serial ports  :-)

	I suppose I could just comment out the running of "ttyflags -a" in the
	startup, and see how much further I get booting-wise with it ...

It's worth a try.

Is the zs driver attaching?  Could you send out a bit more of the boot messages?

Do any of the older kernels have this problem?  Are you using a sparc /dev
or a sparc64 /dev ?

Eduardo