who's got an M88k Aviion?

From: r. 'bear' stricklin <red_at_bears.org>
Date: Thu Sep 20 16:03:15 2001

On Thu, 20 Sep 2001, salo wrote:

> after pressing 'on/off' button, during startup hold 'reset' button on
> the back side, it will fall into firmware.

Generally you can press this 'reset' button at any time; it behaves more
like an 'interrupt'. In practise it's best to at least let the system
progress past self-test number 3 before pressing it, or not going near the
button at any time the OS is running.

> then you should be able to boot into single user mode from harddisk
> typing:
>
> b ncsc(sd(0),0) -s

the format here is:

   ctrlr(dev(instance,target,lun)) file options
   ^ ^ ^ ^ ^ ^ ^
   | | | | | | |
   | | | | | | a runlevel may be specified
   | | | | | | such as '-s' or '-3'.
   | | | | | | initdefault for a newly-installed
   | | | | | | DG-UX is runlevel 's' (single-user)
   | | | | | |
   | | | | | traditionally, 'root:/dgux'
   | | | | | an alternate file may be specified
   | | | | |
   | | | | default '0'
   | | | |
   | | | SCSI target (ID) of desired boot device
   | | |
   | | controller instance number. traditionally '0'
   | |
   | 'sd' for SCSI disk or CD-ROM
   | 'st' for SCSI tape
   | other values for SMD or ESDI device
   |
    controller type
    'insc' for workstation onboard SCSI
    'ncsc' for VME SCSI
     other values for other controllers

lun, file, and options may be omitted for default values.

> btw. i have another problem. i have Sony GDM-1601/8 monitor (shipped by Data
> General with own logo) connected to my AV 530 with graphics card by 3 BNC RGB
> cable made from standard 50ohm coaxial cables (i know there should be 75ohm
> ones, but i just wanted to try it).

Probably not a good idea, the 52-ohm coaxial centre conductor has a larger
diametre than that of 75-ohm coax. It's possible to damage the jacks by
using the wrong able.

It sounds like you have a different problem, though. You need to re-set
the default vertical refresh frequency. There are two possible values---60
Hz or 72 Hz. I have some notes at home on how I was able to accomplish
this. I'll send a followup later this evening.

> are shifted to each other and it is shaking a bit. i hoped that sync on green
> was enogh but now i am not sure. graphics card i have is some data general 8

The monitor should display nothing if it does not find a sync signal
present. It seems more likely you just need to set the refresh rate.

ok
r.
Received on Thu Sep 20 2001 - 16:03:15 BST