I will have more on that topic in another article. For a BlinkenBone system you will need a Beagle Bone White, the BlinkenBus card and a BlinkenBus I/O board. Also, I use a BeagleBone Black for the development work with Ubuntu on a 16GB microSD. It can get the date/time from the linux system it is running on (Angstrom/Ubuntu). I like using the PDP-11/93 for test work on Simh as it contains a TOY clock so you don’t have to keep typing in the date and time on boot. dsk file that you can use as a bootable RSX11M+ system on most emulated PDP-11s.
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Once you download and unzip this file you will have a. You can find a bootable “baseline” disk image at:
![mw.dsk emulator os-9 -mac mw.dsk emulator os-9 -mac](https://i1.rgstatic.net/publication/316513643_Resilienssin_edistaminen_jatteenkuljetuksissa/links/5901c0ce4585156502a24442/largepreview.png)
The last version of it (V4.6) was updated to be Y2K compatible so current dates work fine on it. The most sophisticated PDP-11 operating system is RSX11M+ which runs particularly well on a PDP-11 with I/D space (11/44, 11/70, 11/73, 11/83.
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In this article however, I want to describe in detail how to obtain and build a customized RSX11M+ operating system for the finished project.īuilding a multi-user PDP-11 operating system to use with Simh and a Blinkenboard is fairly straight forward. I did one thing differently than Jörg in making the connections from the three 40 pin ribbon cables that connect the front panel to the I/O board which was to use wire-wrapped connection between the I/O pins on the board and 40 pin wire wrap connectors which mate with the cables from the front panel. Jorge has provided excellent documentation on his Blinkenbus platform here and here on this site which I used to put the pieces together. I looked at several projects on the internet that reanimated PDP-11 front panels and contacted Jörg who with his colleague Thomas Höffken (who created the I/O boards) provided everything that was needed. In fact, GE is looking for experienced RSX programmers (in 2013) for their nuclear control systems, if you have the background. That's the kind of reliability you need if you want to control a nuclear reactor. Users editing a file might loose a single key stroke, but there edited file was intact. If you pulled the plug and then reconnected the power, the operating system picked up where it left off. This was a system with core memory that didn't need power to retain memory. The RSX light pattern starts from each side of the LEDs and moves to the center where it then explodes outward. In the early 1980s, I saw the RSX pattern on a PDP-11/70 at a DEC office in Chicago where I was taking the RSX operating system internals course.
![mw.dsk emulator os-9 -mac mw.dsk emulator os-9 -mac](https://imagizer.imageshack.com/v2/806x678q90/922/A0P3ce.png)
My goal was to run RSX11M+ on an emulator and have the reanimated display exhibit the idle light pattern that RSX systems produced on PDP-11s. This was a smaller front print PDP-11/70 that fit in two tall 19 inch racks. I bought a DECsystem 570 front panel on ebay. First I’d like to provide a bit of background on my project that Jörg Hoppe made possible with his modified Simh and the Blinkenbus technology he and his colleagues have developed.