DG Nova 4

From: ClassicCmp <blergh_at_dds.nl>
Date: Wed Nov 8 17:25:22 2000

Hi Bruce,

On Wed, Nov 08, 2000 at 08:50:29AM -0700, Bruce Ray wrote:
> The Nova 4 and and Nova 3 CPU cards are not compatible, but most of the I/O
> cards are.

I have a few devices I want to use to revive the Nova 3 that belongs
to a fellow hobbyist.

There's a Western peripherals mag tape controller, an SMD controller,
two basic I/O boards, and a RIANDA controller.

I think most of these cards are compatible with the Nova 3, but what
about the RIANDA disk controller in the "MEM I/O OPT" slot ?

This controller is connected to the Perkin Elmer ST-2222 diskdrive.

> There are two main I/O daisey chain signals on a standard Nova/Eclipse
> backplane - interrupt priority in/out and data channel request in/out - and
> they usually should be jumpered across unused slots if other I/O cards exist
> higher in the chassis.

Right, can you tell me between what pins these signals should be jumpered ?

I assume there should be just a wire-wrap between those pins ?

> Those don't sound like standard DG I/O card numbers: I believe that the DG
> board part numbers usually start with 005-xxxx-xx. I would have to research
> that. DG put its 15" x 15" card numbers along the "front" reinforcement
> bar, that part of the card just opposite the finger contacts and directly
> between the two extraction handles. There were usually a series of three
> numbers on the bar.

Actually I am sure it's not original DG hardware.

I think the board was made by a company called "DMA", with maybe an
additional "C" before that. ("CDMA?")

Thanks to you and Craig for the additional information.

Sincerely,
                Erik.
Received on Wed Nov 08 2000 - 17:25:22 GMT