Subject: Re: serial ports on Multia
To: Chris Jones <>
From: Sheila and the GeeSer <>
List: port-alpha
Date: 03/10/1999 18:57:50
I am including this on list, just to share.
I have been just playing with my multia, waiting to get my external
drive(s) up and running.  So, I don't have any direct experience yet,
but I will be using my serial ports for external modem, and a few other

I have played with and run netbsd on vax.
I had a bit of experience with serial ports on the uVax II.  The key
there was with the modem controls.  I had to rig a real null modem cable
with DSR/modem ready, cts/clear to send, and CD/carrier detect to make
it work.
I expect to really get into this beasty shortly, I am under the
assumption that the alpha serial code is about generic, usual unix style
tty0x, etc.
Will advise!
bad bob

Chris Jones wrote:
> I've sent this question once before, but I didn't get any response.
> Did I miss something in a FAQ or something?  Is nobody else interested
> in using serial ports on a Multia?  Am I the only one with this
> problem?
> I can't use the serial ports on my multia.  I can send characters out
> the serial port, but I don't get any back.
> Does anybody have any ideas what I can do about this?  Are serial
> ports just broken?  Thanks in advance.
> Chris
> NetBSD 1.3K (AWKWARD) #0: Tue Mar  9 19:20:02 MST 1999
> (PCI ISA), 167MHz
> [...]
> com0 at isa0 port 0x3f8-0x3ff irq 4: ns16550a, working fifo
> alpha_shared_intr_establish: isa irq 4: warning: using edge-triggered on level-triggered
> 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
> --
> Chris Jones                                
>            Mad scientist at large          
> "Is this going to be a stand-up programming session, sir, or another bug hunt?"

real address is shsrms at erols dot com
The Herbal Gypsy and the Tinker.