Compukit UK101 (2)

Made in the UK by Compukit in New Barnet, North London, the Compukit UK 101 was originally a copy of the Ohio Scientific Superboard II single-board computer. The Compukit UK 101 retailed for £219 +VAT. 

It featured a few enhancements for the UK market - notably replacing the 24x24 (add guardband kit to give 32x32) screen display with a more useful 48x16 layout working at UK video frequencies. The video output was black and white with 256 characters generated by a 2K ROM. It had no bit-mapped graphics capability. The video was output through a UHF modulator, designed to connect to a TV set.
It was powered by a 6502 microprocessor CPU running at 1 MHz, and was equipped with up to 8K of RAM using 2114 static RAM chips of 1024x4-bit. An additional memory-mapped 1K of RAM was used for the video display. It had the 8K Microsoft BASIC interpreter stored in ROM. In addition to Basic, a 6502 machine code monitor (2K) was built into ROM. It allowed programming by entering sequences of 6502 operational codes. Later a two pass assembler was available which allowed the use of assembly language.

In common with other home computers of the time, software could be saved and loaded on standard cassette tapes. The UK101 uses the Kansas City standard tape format. I/O was managed by a Motorola 6850 ACIA. This allowed a full RS232 port to be implemented, with the addition of a few extra components and minor modifications to existing jumpers on the board.

The 40 pin expansion socket opened up the world to the UK101. It also mated with all Superboard extras. One could attach a dual 5.5-inch floppy disk controller and a memory expansion card (40K max) to allow faster and reliable save/load of programs/data.

You could buy the UK101 as a kit or as ready made for an extra fee. Full constructional details were featured in Practical Electronics magazine, starting in the August 1979 issue.

The kit came in a cardboard briefcase, in which there were anti-static tubes containing the 65+ ICs, a box of IC sockets, and bags containing passives (mainly 0.1uF ceramic decoupling capacitors) and keyboard bits (the keyboard switches were soldered directly to the PCB).

This example of the UK 101 is mounted in a proprietary box and is complete with the following printed notes:
6502 Assembler / Disassembler
Toolkit for UK 101 and OHIO systems
Basic 4 notes
Memory Display and modification
CEGMON A new monitor for OSI and UK101 BASIC-In-ROM systems
Real Time Clock for Compukit UK101

OSI UK User Group Newsletters:
Vol 1 No 2 March 1980
Vol 1 No 3 June 1980
Vol 3 No 1
Vol 3 No 2

This item was kindly donated to us by Craig Cruickshank.

Manufacturer: Compukit
Date: 1979

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Compukit UK101 (2) Manuals:

Item Manufacturer Date
Compukit UK101 Manual Compukit 1979

Other Systems Related To Compukit UK101 (2):

Item Manufacturer Date
Compukit UK101 Compukit 1979

This exhibit has a reference ID of CH20372. Please quote this reference ID in any communication with the Centre for Computing History.


Compukit UK101 (2)

  Software Archive   [1]
  Peripherals   [1]

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