Sunday, November 20, 2016

Friday, November 18, 2016

Data General Nova 3 CPU board

Nova 3 CPU board from Nova 3 system

overall view of the board

View of an grouping of 24 pin chips
 The 4 chips with 2 16 pin DIPs between them are 74S181 4 bit ALU's so this is a '181 processor for math

Grouping of pals on right side of board

right side edge card connector.  shows some more pals

Grouping of 8 pin dips on the left side, top of photo is left edge card

ECO tag on the bottom of the board

IC's between the 8 pin grouping mentioned on left side of board, and the ALU photo

Datum controller 4091 for Diablo 30 on Data General Nova (3)

The Datum controller in the DG Nova 3 was a Datum 4091 optioned for the Diablo 30 drive.

Looks like acquiring one of those, or an emulator may be in order to gen up a working system.

Option sticker

Part number 4091-NDC

Datum logo on component side etch

Clipping about the Datum controllers from Computer World

Bitsavers link to Datum catalog mentioning the controller subsystem.

Thursday, November 17, 2016

Data General Nova 3

A nice small system Nova 3, 2 16K core boards, and basic I/O card.

Seller had powered it on to hear the fans run, maybe not a good thing, but will see.

Nova 3 System

Card cage, CPU bottom, 2 16K core, Basic I/O

I/O connections on back

Legend on back of system (unverifed for now, other than type of board)

Basic I/O and two 16K boards, showing etch info

Processor board

A link to a page for the Datum 4091 controller for the Diablo 30 in this system is here.

Nova 3 CPU board

Link to page for the Nova 3 CPU in the system is here

Friday, November 4, 2016

Neon OSGLIM 73 neon bulb

Bulb with neon arc.

Legend on the bulb

OSGLIM              73        NOT TO BE BURNT WITHOUT


I have two of these, one with the legend unreadable  In the photos below some of the bits of the legend can be made out, but one needs the bulb to actually decipher it.