Category Archives: Retro-Computing

DECstation 220 Faulty Parts Found

Posted on August 19, 2017 by rjarratt

I have been doing more work on the DECstation 220. As I commented in my previous post, it is only putting out a corrupted pattern to the screen because it is not writing anything to the video memory, apparently because the EMEM … Continue reading →

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DECstation 220 Update

Posted on August 13, 2017 by rjarratt

Previously I reported that I am now getting corrupted video out of the DECstation 220. I have spent the last couple of weeks trying to understand the problem, checking the tracks to all the chips in the battery-damaged area, on both … Continue reading →

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DECstation 220 Now Getting Corrupted Video

Posted on July 31, 2017 by rjarratt

I am now getting a corrupted video pattern on the DECstation 220 Continue reading →

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DECstation 220

Posted on July 27, 2017 by rjarratt

Some time ago I collected a DECstation 220. This is the machine that succeeded the Rainbow. It uses an Intel 80286 processor and is DOS compatible. Mine, being a European version, has Olivetti parts inside. The person I got it … Continue reading →

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DECstation 5000/240 Progress

Posted on July 19, 2017 by rjarratt

I have made a lot of progress in getting my newly acquired DECstation 5000/240 going again. Before doing anything I took it apart and opened up the power supply to inspect the electrolytic capacitors. They all looked fine. I then … Continue reading →

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DECstation 5000/240

Posted on July 15, 2017 by rjarratt

My latest acquisition. A DECstation 5000/240 with a TURBOchannel Extender. Continue reading →

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Rejuvenating This Site

Posted on July 5, 2017 by rjarratt

For some time now I have been thinking of updating this site, and actually documenting more about my collection. The impetus came recently after I started working on an emulator for MU5 and I needed a home for information about … Continue reading →

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Current Activity

Posted on March 3, 2008 by rjarratt

As I have not updated this blog for quite some time I thought I would just list some of the things I am up to at the moment.   The main thing I am doing is running TOPS-20 on SIMH. … Continue reading →

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Getting a DECserver 200/MC Working

Posted on September 1, 2007 by rjarratt

  Recently I was given an old DECserver 200/MC. This is a device that connects serial ports on the DECserver over an Ethernet LAN to one or more VMS computers. It uses a protocol called LAT, which stands for Local … Continue reading →

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Resetting the SYSTEM Password on a VAXstation 4000 VLC

Posted on July 11, 2007 by rjarratt

I recently needed to reset the SYSTEM password on my VAXstation 4000 VLC. I found some material on the web which helped, specifically the following http://www.people.vcu.edu/~agnew/MVAX/MVAX_FAQ_TEXT.HTML and http://h71000.www7.hp.com/doc/83final/ba322_90045/apas01.html. The procedure I followed was:   Step 1   Get to the >>> … Continue reading →

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