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.

The original Nascom 1 was designed by Chris Shelton. Shelton’s design work was outlined in a series of articles published between November 1977 and January 1979 by Wireless World magazine.





I got my unit from our local auction site. Did not come with any keyboard and is at present not going. It’s been installed in a suit case and has all the connections on the outside of the case.

I have just started debugging the video circuit.

The Nascom 2 how I got it in the suite case

The mighty Z80 CPU

Backed up all the EPROM’s and burned a new Character Generator EPROM.

The video circuit working with just the Character Generator replacement EPROM.

Added the video RAM ic so have random characters displayed –  happy with the progress so far.

Next on to the CPU and memory addressing.




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