S100 PDP11

S100 PDP11

After many Months of work I now have a S100 PDP11 system working and running RT11-v5.03SJ. It’s currently sitting in my 9 Slot Test rig.

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TEI MicroFrame

TEI MicroFrame This is my TEI chassis with 12 slot backplane, Have now recapped the power and changed it over to 240 volt. Will add the Z80 that is sitting on top or a 8080A CPU board not sure yet with RAM/EPROM board with a serial board for another S100 system.                  ... Read More...

IBM XT 5160

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Dream 6800 40th Anniversary

Dream 6800 40th Anniversary

Dream 6800 40th Anniversay vintage computer, Has been designed by David Fry (UK), has completed an elegant re-design of the DREAM using a double-sided PCB (pictured below). It has an on-board switchmode regulator for the +5V supply and a DC/DC converter for negative 5V. Memory has been upgraded to 4KB using two 6116 RAM chips. The EPROM can be a 2716 or 2732 type. Otherwise, David’s design remains faithful to the original. The download includes KiCad PCB design files and Gerber files for board fabrication.

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Nascom 2

Nascom 2

The Nascom 1 and 2 were single-board computer kits issued in the United Kingdom in 1977 and 1979, respectively, based on the Zilog Z80 and including a keyboard and video interface, a serial port that could be used to store data on a tape cassette using the Kansas City standard, and two 8-bit parallel ports. At that time, including a full keyboard and video display interface was uncommon, as most microcomputer kits were then delivered with only a hexadecimal keypad and seven-segment display. To minimize cost, the buyer had to assemble a Nascom by hand-soldering about 3,000 joints on the single circuit board.

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