Viking SCSI controller RS232 adapter

Warner Losh imp at
Tue Jun 28 14:51:30 CDT 2022

On Tue, Jun 28, 2022, 1:21 PM Zane Healy via cctalk <cctalk at>

> On Jun 28, 2022, at 12:10 PM, Daniel Seagraves via cctalk <
> cctalk at> wrote:
> >
> > For the UDT at least the RS232 lines are regular RS232 and the plug I
> made for communicating with it was just an old PC serial pigtail bodged
> onto a short SCSI ribbon cable.
> >
> > I would expect CON to be CONfiguration port; No idea what FP is for.
> That’s good to know.  If you have the actual adapter, it will work for
> both the Unibus and QBus boards.  So what worked for use for a UDT, should
> work on a QBus board

You may need to hook a scope to TX lines to know the right levels...



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