Welcome to my Data General Corporation (DGC) Preservation and Restoration site. The aim of this site is to preserve and restore systems that were designed and built by Data General Corp and whilst doing so provide as much information on those systems, peripherals, software and documentation as possible. If you are considering scrapping or sending anything Data General (DG) related for disposal to a salvage or recycling facility please consider sending it for preservation instead. You can contact me here if you have any Data General Systems, Peripherals, Displays, Documents, Manuals, Cables, Terminals, Parts, Spares, Floppys or Tapes you wish to dispose of.

Data General Systems were used across the world – Not only were they sold directly to end users by Data General themselves but they were also embedded into many industrial, military and commercial systems by OEM’s. I cut my electronics teeth using Data General systems (read more in about section) and I have very fond memories of these systems which is why I recently decided to buy and restore my first system which happens to be an MV/9800 – one of the last 15″ form machines made by Data General.

The site is very much work in progress so check back often to see how the projects are progressing.

Latest News
Data General AViiON AV5500
DG AViiON AV5500

When I embarked on this hobby I made a pact with myself to stick to the ‘proprietary‘ Data General CPU’s e.g. the native Nova/Eclipse and MV machines, however recently I stumbled across an Motorola 88110 based AViiON server and intrigue got the better of me when the owner confirmed that it had a full set of

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Data General microNova I/O Cable and Terminator
DG microNova I/O

One thing that has genuinely surprised me is how much ex Data General people want to help with physical items for a restoration and with how much information they remember about kit they worked on many years ago! VIP Alexandre made contact with me completely out of the blue and offered to send me the

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Dg Fiche Set
Data General Microfiche

As well as the Pharaoh (Data General One) VIP John (USA) also very kindly gifted me a complete set of Data General Microfiche covering up to the early MV’s along with their peripherals. This is an incredibly useful source of technical information and will be very well looked after.  Because of this I have invested

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Data General Pharaoh Manual
Data General One (Pepi II)

DHL delivered a very nice surprise to me today courtesy of VIP John (USA). John has very kindly entrusted me with his Data General Pharaoh (DG Model One 2-T) from his days with Data General Field Engineering. I have given it the name Pepi II. This example is in pristine cosmetic condition and has clearly

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Data General Field Engineering Password
SCP FE Passwords

Both my MV/9800 and MV/9600 CPU’s have a Field Engineering (FE) SCP command which allow access to the Error Log for the PCB. So if a PCB fails a self-test (as my MV/9800 does) the only way to obtain detailed information about the error is to access the log. In addition the FE area also

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crater en masse
Crater en masse

I had a call a couple of days ago to say that the Data General 6220 5Mb Winchester Chassis was ready at the shot blasters. On collection I was amazed to see just how much damage the rust had done to the chassis. With all of the oxidant removed the chassis revealed a lunar type environment

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Data General Dasher Emulator
Data General Dasher Emulator

I came across this Dasher emulator ‘DasherG’ which has been written by Stephen Merrony and is available on GitHub; https://github.com/SMerrony/DasherG  I have switched to this emulator as it will allow me to provide much better quality screenshots and video for this site rather then taking photographs of my D464 console screen! Steve is a great guy

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Data General Back-plane DB50
Creating a Standard (DB50)

When my Data General Eclipse MV9800 system, arrived I was rather excited to find a number of DG SCSI II controllers in the chassis. One of these was presented to the outside world via a DB50 connector. Great I thought until I tried to use it with a standard SCSI DB50 to CN50 cable –

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DG Parts and Models
DG Part and Model Numbers

I have now published my sections on Data General Part Numbers and Model Numbers. This will be an ongoing task and will be updated as new documentation is read or parts discovered. I have three sections at present the 005- range, 118- range and Model Numbers. These can be found in the repository under Documentation.

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DG 6220 Winchester Side-1
Something Rather Rusty!

I found (via the classiccmp mailing list) an intriguing Data General item; intriguing because I have not seen a unit like this before. I made enquiries with the owner and they did not know what it was either. They also sent me a picture of the rear of the unit saying “you should be aware

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Power Supply (PSU) Checks

An important part of any restoration project is thoroughly checking the power supply unit (PSU) of the equipment you intend to restore. A fault with a PSU could potentially render the whole units electronics dead so its critical that you ensure that the PSU is operating as designed. Take notes/pictures before removing any cables or

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Resistor Array

Something that is new to me is the Data General Burst Multiplexor Channel (BMC) bus. When I used a Nova 3 and Eclipse S140 the BMC bus did not exist. As far as I can tell this was introduced with the advent of the MV/8000 (Eagle). The BMC bus allows PCB’s to transfer data direct

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MPT/100 Angle
Data General MPT/100 Has Arrived

This Data General Enterprise MPT/100 has arrived for restoration and preservation – it’s a sweet little machine that has a microNOVA CPU hiding inside, dual 5.25″ floppy drives and integrated keyboard and display. It would have run MP/OS. More to follow on its dedicated restoration page here. I am looking for Documentation and Software for the

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Recent Visitor Comments
  • John Stout Nova 1200 - Ah, forgot to say that we ran on a Nova 1220 and I still remember the boot sequence that needed…
  • John Stout Nova 1200 - Oh. this brings back so many memories. I was involved in a computer aided draughting system called SUE which was…
  • Jaak Bartok MPT/100 microNOVA - Have one with 8″ floppy HD??
  • Ian Willing MPT/100 microNOVA - Hi I worked for DG from 1983 until 1992 at the European repair center in the UK, The first product…
  • Tyler MPT/100 microNOVA - Nice machine. I found a mN615 chip in a lot of chips I purchased and after lots of searching I…
  • Nick B. DG/10 Desktop - Long time since I saw one of these! We had one installed in the late 1980s at the airport I…
  • admin DG/10 Desktop - Thanks for making contact – I can’t see any reference to an internal modem, however the DG Desktop series could…
Data General (DG) History

Data General Corporation (DGC) was founded by several engineers from Digital Equipment Corporation who were frustrated with DEC’s management and left to form their own company. The chief founders were Edson de Castro, Henry Burkhardt III, and Richard Sogge of Digital Equipment (DEC), and Herbert Richman of Fairchild Semiconductor. The company was founded in Hudson, Massachusetts in 1968.

Edson de Castro was the chief engineer in charge of the PDP-8, DEC’s line of inexpensive computers that created the minicomputer market. It was designed specifically to be used in laboratory equipment settings; as the technology improved, it was reduced in size to fit into a 19-inch rack. Many PDP-8s still operated decades later. De Castro, convinced he could do one better, began work on his new 16-bit design.The result was released in 1969 as the Nova.

To read more visit the Wikipedia page (where the above text was found). The Wikipedia page for Data General can be found here

de-Castro President Data General with DG MPT
Edson de Castro with DG MPT desktop in background

Data General Advertising: 

Data General Systems manufactured between 1969 and 1999: 

Nova, SuperNova, Nova 1200, Nova 800, Nova 840, Nova 2, Nova 3, microNOVA, Nova 4, Eclipse S140, Eclipse S100, Eclipse S200, Eclipse C300 Eclipse S230 Eclipse C330, Eclipse S130, Eclipse S250, Eclipse C350, Eclipse C150, Eclipse S130, Eclipse M600, Eclipse S/20 (microECLIPSE), Eclipse CS20, Eclipse CS40, Eclipse CS60, Eclipse S120, Eclipse S280, Eclipse C380, Eclipse DG500, Eclipse MV/8000 (Eagle), Eclipse MV/6000, Eclipse MV/4000, Eclipse MV/10000, Eclipse MV/2000, Eclipse MV/7500, Eclipse MV/2500, Eclipse MV/20000, Eclipse MV/7800, Eclipse MV/15000, Eclipse MV/40000, Eclipse MV/1000, Eclipse MV/1800, Eclipse MV/3000, Eclipse MV/5000, Eclipse MV/30000, Eclipse MV9600, Eclipse MV/60000, Eclipse MV9800, Clariion Disk subsystems and Motorola and Intel based Aviion systems before being sold to EMC in 1999.

These systems ran various operating systems, high level languages and applications including:


This site was created to help preserve the history of Data General Systems by acquiring (thru salvage, gifting, purchasing or trading) and restoring those systems. In doing so we can hopefully create an informative reference for each item that we acquire for future reference, from complete systems, peripherals, PCB’s, spares all the way down to the cables used to connect items together.

We are based in Oxfordshire, United Kingdom and are able to advise of the best course of action should you have a Data General System or associated equipment or software that requires disposal. We can also advise on and provide data destruction on those systems whilst retaining (where possible) the physical hardware for preservation. We can also (where required) physically remove disk storage for destruction or provide data destruction certificates.  Please use the Contact page in the menu above or click HERE

This site (datageneral.uk) is unrelated to any entity who may have previously or currently owns any Data General Trademark or Copyright. The information on this site is made available for enthusiasts use only.

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