> > Are the VAXstation 3100 diagnostic LEDs documented online anywhere?
> > So far I have only seen specific answers to questions about them.
> >
> > I have problems with two VAXstation 3100 (m30 and m38) with serial
> > console.
> > They were ok until one was rebooted and never came up again, and the other
> > was powered off.
> > Afterwards, both were stuck with LED 7 and 6 on, and LED 5 blinking
> > occasionally.
>
> See http://www.nvg.ntnu.no/data/hardware/vax3100-leds.html

Maybe this should be at the netbsd.org hardware pages?

> I checked a bit more, and it goes:
> 	1111 1111
> 	1111 0000
> back:	1110 0000
> 	1101 0000 (very fast)
> 	1100 0000
> goto back;
>
> What am I to make of it?
>
> Bad serial device?

Figured it out after a while.

The serial port hardware were no longer content with RS-232 and would only
accept DEC-423. (Tested on a VT340+)

Maybe there is a need for more docs/link about DEC-423 and RS-423?

Regards,
Roar