Viking SCSI controller RS232 adapter

[Glen Slick]

On Thu, Jun 30, 2022, 12:34 PM Douglas Taylor via cctalk <
cctalk at classiccmp.org> wrote:

> Update -  I have 3 of these Viking controllers, 2 are rebadged to
> Alphatronix.
>
> 1. I was able to 'kludge' together jumpers to connect a laptop serial
> port to the controller.  Pin 20 IDC -> pin 2 DB-9, pin 22 IDC -> pin 3
> DB-9 and pin 24 or 25 IDC -> pin 5 DB-9.  It didn't seem to matter if
> you used 24 or 25 for the ground.
>

Did you split off the connections to Pin 20 and Pin 22 of the controller so
that they only connected to the serial port, and not to the SCSI bus, or
were they wired in parallel to both the serial port and the SCSI bus?