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In the 1980s, Acorn developed the ARM CPU (as seen in your iPhone) and a workstation operating system for it named RiscOS. The ARM CPU has evolved into a lot of tiny systems, and RiscOS has become almost free; here it is running on a tiny board named the BeagleBoard. It's a workstation that fits in a pocket.
Dumping the contents from the varius RL02 diskpack present in the museum archive, using a MicroVAX II clustered with a simh system with VMS, the old PDP 11/34 of the museum, and the RL02 drive from the "new" PDP 11/23.
Freaknet Museum - museum.dyne.org
I've been getting some home-made ZX Spectrum programs off cassettes that have been various lofts for decades. Amazingly, most still load. See github.com/blogmywiki/ZXSpectrum for files you can load in emulators.
Assembled and running my PongClock.prc (which you can find here)
The program includes logic which disables the auto-off feature if it finds 2.75V or greater at startup.
This is my second PalmOS program, I wrote CountDown more than 10 years ago. Writing this one in 2010 wasn't easy, it may count as Retrocomputing. The tools I used back then were lost. I ended up using a Metrowerks CodeWarrier Lite I still had on CD. It won't even install on my new (Windows 7) laptop.