Moving my Data General MV/8000 to a permanent location

Yesterday, I persuaded two friends, Tobbe and Jan, to help me move the MV/8000 to a permanent location. Stealing the system will not be an easy task since we had to remove the door frame in order for the system to pass through the opening. The next step will be to vacuum clean the outside of the cabinets as well as the internal. A big Thank You to Tobbe and Jan (who also took the pictures).

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DG Alumni

“And being the techies that we still are, DGalumni.com was born, a website dedicated to all former Data General employees, who would like to connect with other DG alumni.”

If you are one of us and want to join, please visit DGalumni.com and submit your information to be added to the alumni page.

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The day Kari and I went to Lund to pick up the VAX 11/780

On Monday the 20th of June, Kari came over from Finland and the two of us drove down to Lund to get the VAX 780 system “VEGA” at Lunds Tekniska Högskola. I made a mistake in that I thought we were going on Tuesday and so I delayed our departure from Upplands Väsby with about 20 minutes. With the aid of Tomas and Roger of the Computer Science department we loaded and secured the system on Kari’s truck. We were able to position the cabinets in a very tight formation and only needed to secure the load with only one load securing strap. I t took us all night to drive back to Upplands Väsby where we arrived at 7 in the morning. Kari went on to Kapellskär to take the ferry across to Finland and the VAX 780 is now sitting in Kari’s garage waiting for the UNIBUS and MASSBUSS to be hooked up to the CPU and the tape an disk to the MASSBUSS and to be fired up after Kari has made the necessary checks of the power supplies.

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The people that developed Data General’s first 32-bit minicomputer; the MV/8000

Below are the hardware and software teams that developed Data General’s first 32-bit minicomputer; the MV/8000

(Pictures from Steve Wallach)

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My Data General Eclipse MV/8000 Minicomputer

The Eagle has landed

On March 24, 2011 I was contacted by Lunds Tekniska Högskola, a Swedish university that had read my blog about old Data General minicomputers. They wanted to know if I was interested in a complete Data General Eclipse MV/8000, code named “Eagle”, the first 32-bit computer built by Data General. And yes, I was very interested.

The system has been stored in a dry storage facility since the day it was decommissioned 25 years ago. The MV/8000 is complete with a 6026 tape drive, an Argus disk (thank you Randy) and an 6061 Zebra disk drive with a 14″ Disk Pack storing 195 MByte’s.

Untouched during all this time and with all the original components intact the way they were 25 years ago, this complete system, when decommissioned, was a running production system in perfect order. After being powered down, the disk and tape drive cabinet were disconnected from the CPU and the system was stored in a dry and warm storage facility where it has been stored ever since. I suspect that a thorough vacuum cleaning to remove any dust, a check of the power supplies for correct voltage and ripple before powering up and the system will most likely run as it did when decommissioned.

This system, was the in-house computer that was used at Data General’s Nordic headquarters in Huvudsta outside Stockholm, Sweden where I worked in 1983-85 and on on this very machine I had my first ever e-mail account since we ran CEO (Comprehensive Electronic Office) on this MV/8. The system was later sold to the university when our MV/8000 was replaced by an MV/10000.

A first trip to the university was made aimed at making a plan for the loading of the MV/8000 system onto a truck for transportation to Upplands Väsby and planning the temporary relocation of a complete VAX 11/780 from the mid 80’s which I also acquired.

On April 18, 2011 a second trip to the university was made. This time the MV/8000 was loaded onto my truck and wrapped with a layer of plastic shrink wrap film. Then corner protection made from Styrofoam was applied and Styrofoam boards were placed on all sides. Another layer of plastic shrink wrap film was wrapped around and over the top side. Finally each cabinet was strapped to the sides of the truck.

Back in Upplands Väsby the system was unloaded and placed in the garage of the building where I live. Here a third layer plastic shrink wrap film was wrapped around and over the top side of all three cabinets and finally a tarp was wrapped around the whole system for dust protection. The system will be stored here until I find permanent storage.

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The VAX 11/780 system “VEGA” at Lunds Tekniska Högskola

Click here for more information and additional pictures on my VAX 11/780 system.

The VAX 11/780 is now at it’s new home in Finland. More about the move later.

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Teletype ASR 33

I just picked up a Teletype ASR 33 from a location in southern Sweden. The machine was last used at the Medicintekniska sektionen in Lunds sjukvårdsdistrikt. It’s inventory number was 220 137. This is a model 3320 3WA and the serial number is 044913, code UK819DSK and the Teletype is equipped with a 50Hz motor from the factory.

After cleaning and lubricating the paper punch and the reader both are now back in working order.

The next problem was the carriage that would not move (step forward one character at the time) due to completely stuck carriage movement mechanism. Instead of disassembling the complete mechanism, risking breaking or misplacing any of the small springs, I used isopropyl alcohol to clean the parts. I used tiny dental brushes that you can pick up at your local pharmacy.

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Time to test the Data General MV/2000 DC

More MV/2000DC

Rear of MV/2000DC
MV/2000DC Main Board with memory and LAN add-on boards
MV/2000DC

 

 

I opened the case and the system boards looked OK but as can be seen, the lower part of the cooling fan assembly casing is rusty why the system most likely has been exposed to either extreme moisture or rain:

 I vacuum cleaned the interior and boards to remove any debri and powered on the system. An error message is shown on the screen:

TESTING…

    Model # 8938; System Processing Unit (SPU)

        AB, FAILED; ERROR 1:11:1

Unfortunately, I do not have any documentation at all for the MV/2000DC. If any of you readers have MV/2000DC documentation, I would really apreciate a copy.

The disk is very quiet. All I can hear is the brake releasing at power up but no disk motor spinning. Removing the Maxtor disk shows some corrosion on the electronics board in the area with the power transistors that drives the stepper motor. I brushed the loose corrosion away with a small, soft bristled brass brush and cleaned the board with isopropyl alcohol. After drying I put the disk back in the MV/2000DC chassies and powered up. Volai! The disk started spinning and the Maxtor produced it’s “beep” to signal it was ready.

The error is still present; AB, FAILED; ERROR 1:11:1. and I’m currently stuck.

Rusty MV/2000DC cooling fan mount

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Maxtor XT-1140 Hard Drive spindle motor

Maxtor XT-1140 installed in Data General DG30

The Maxtor XT-1140 Hard Drive in the DG30 no longer turns the spindle motor. It did start to run twice, but the system would not boot. I do not know if there is any bootstrap loader or OS on the disk.

I have searched for the schematics for this drive, but only found strapping information. What I really need is the schematics for the XT-1140 drive itself. It could be an easy problem such as the power transistors for the motor or a more serious issue such as the spindle motor being stuck. I prefer to make sure the spindle motor drive circuitry works before opening up the drive enclosure.

If you have the schematics for the Maxtor XT-1140, I would love to receive a copy. The Maxtor XT series was collectively referred to as the XT1000-2000 OEM series and was used by not just DG but also by DEC.

Maxtor XT-1140 label

Maxtor XT-1140 with electronics board removed

 
 
 
 

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Link to Desktop Generation Model 30 pictures

Here is a link to pictures of my Desktop Generation Model 30

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