Monthly Archives: October 2017

Imaging RD51 From a DEC Rainbow 100 Model B

Posted on October 29, 2017 by rjarratt

I recently acquired a DEC Rainbow 100 Model B, with a working RD51 disk. The disk is running MS-DOS 2.11. I want to preserve the contents of the disk before it fails. A while back I acquired the MFM Emulator board designed … Continue reading →

Posted in Retro-Computing | Tagged | 3 Comments

Corroded H7826 Power Supply

Posted on October 23, 2017 by rjarratt

Now that I have got the DECstation 5000/240 working again it is time to move on to the TURBOchannel Extender that came with it. This is in a terrible state, with lots of corrosion all over the place. The worst … Continue reading →

Posted in DECstation 5000/240, Retro-Computing | Tagged | 1 Comment

Booting VAXen From The Network

Posted on October 17, 2017 by rjarratt

Sometimes it is very useful to be able to boot a VAX from the network. The two most common scenarios are Your machine is diskless. As time goes on this is going to be more and more common as SCSI … Continue reading →

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DECstation 5000/240 Running Ultrix

Posted on October 13, 2017 by rjarratt

Having recently fixed the DECstation 5000/240 PSU, I wanted to see that the machine actually runs properly and can run an operating system. I had previously had another DECstation 5000/240, which I had swapped for something else, but I had kept the … Continue reading →

Posted in DECstation 5000/240, Retro-Computing | Tagged | 2 Comments

DECstation 5000 Model 240 PSU Fixed

Posted on October 1, 2017 by rjarratt

I have finally fixed the H7878 PSU from my DECstation 5000 Model 240. When I last posted about it, the PSU was not working very well, it was unable to sustain any load. Following that post I asked for suggestions … Continue reading →

Posted in DECstation 5000/240, Retro-Computing | Tagged | 4 Comments