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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.

SGI 4D320 VGX "Twin Tower"

NCR Tower 32-650 system - Freaknet Museum - museum.dyne.org/

SGI 4D320 VGX "Twin Tower"

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

SGI 4D320 VGX "Twin Tower"

NCR Tower 32-650 system - Freaknet Museum - museum.dyne.org/

Running a PDP11 emulator, talking to an ASR33 teletype. It's Unix, but not as we know it.

NCR Tower 32-650 system - 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.

SGI 4D320 VGX "Twin Tower"

"with MMX technology"

  

SGI 4D320 VGX "Twin Tower"

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.

SGI 4D320 VGX "Twin Tower"

An Apple II fitted with a ZIF socket for easy installation of additional ROMs.

SGI 4D320 VGX "Twin Tower"

SGI 4D320 VGX "Twin Tower"

NCR Tower 32-650 system - Freaknet Museum - museum.dyne.org/

SGI 4D320 VGX "Twin Tower"

MiL's dead and, I think, beyond repair, old iMac - always remove your motherboard batteries, folks.

SGI 4D320 VGX "Twin Tower"

NCR Tower 32-650 system - Freaknet Museum - museum.dyne.org/

IBM PS/2 E, rear view of the unit with the available connector and the rear two pcmcia slot for expansion.

NCR Tower 32-650 system - Freaknet Museum - museum.dyne.org/

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