> 
> Hi,bill
>  Thanks for information, but My Mac can not restart with netbsd on both serial
> mode.
> 
> And, When I switch on Serial echo, Netbsd booting VERY VERY slow, and no output
> printer port. I test both serial mode.
> Startup speed is about one charactor write per 5 sec.

It sounds like the zs_putc routine (which sends a byte out the serial port)
is timing out on each attempt to put a character.

> If you would like to know more informarion, Please let me know.

Unfortunately, to work with these devices, I think we'll have to learn to
talk to the silly IOP. That's not something I can do any time soon. But
if there's someone good at debugging the MacOS serial driver on either this
machine and/or the IIfx who can tell me what to do, then I might be able to
do something.

Thank you for your effort.

Take care,

Bill