Posted by under Android,Emulation,OpenVMS,SIMH,VAX on September 16 2015, 0 comments

I’ve thought long and hard on this one: SimH runs under Linux, and Android is based on Linux, so can you run SimH, and thence a simulation of a VAX, on an Android phone/tablet? Well, obviously you can, but it really is a bit of a fiddle. There is an Simh Android App to do […]

Posted by under DECnet,HECnet,Networking,OpenVMS,Ultrix,VAX on November 12 2013, 0 comments

What is HECnet? HECnet is a DECnet that connects different people who play around with different DEC machines. The network should not be regarded as a serious networking setup, nor should it be expected to work 24/7. It’s a hobby project between people who think it’s fun to create a DECnet network. HECnet is basically […]

Posted by under Emulation,SIMH,Ultrix,VAX on July 2 2012, 0 comments

I’ve had a look at getting an old copy of ULTRIX (Unix for the VAX) running. Having already got Simh up and running, I just cloned the SD card from the VMS host and deleted the VMS specific bits, copied across an image of the Ultrix 4.0 install tape, knocked together a shonky .ini file […]

Posted by under DECnet,Emulation,Networking,OpenVMS,SIMH,VAX on June 18 2012, 0 comments

After getting TCP/IP and a web server working on the simulated VAX, the next logical step would seem to be getting DECnet up and running, and then connecting to other machines. Given the choice of HECnet or the Italian Hobbyist DECnet, I plumped for HECnet. Then, of course I set about doing everything in completely […]

Posted by under OpenVMS,VAX on June 13 2012, 0 comments

So, it is time to try to install a Web Server on the emulated Vax. First, you’ll need to get a copy of UNZIP. I used the version at, renamed it and put it at dua1:[pi.utils]unzip.exe (for the moment i’m keeping utilities in that directory until i decide where to put them). Then, to […]

Posted by under Emulation,Networking,OpenVMS,SIMH,TCP/IP,VAX on June 1 2012, 0 comments

It is time to get TCP/IP up and running on the PIVAX. So once again I’m cribbing this from Phil Wherry’s guide to running VMS on SIMH and Linux. (Note, from now on PIVAX is the simulated VMS machine, and vax-pi is the Raspberry Pi on which it runs.) The fake MAC address of PIVAX […]

Posted by under OpenVMS,VAX on , 0 comments

(Updated 24th Jan 2017) This is just a quick note on acquiring the license keys for OpenVMS. To apply for a license, go to HPE OpenVMS Hobbyist Registration. You’ll need your personal details, along with a Participating Chapter and Membership Number. The easiest way to do this is to join DECUServe. To do this (and […]

Posted by under Emulation,Linux,OpenVMS,Raspberry Pi,SIMH,VAX on May 25 2012, 1 comment

Emulating a MicroVAX 3900 running OpenVMS 7.3 on a Raspberry-Pi…   Starting from my Common Debian Raspberry Pi/Debian Networking SD image some things need to be installed. sudo apt-get install m4 sudo apt-get install flex sudo apt-get install bison At this point creating a user for the Vax and switching to that user is probably […]