Science of Cambridge MK14 + Memory Expansion in wooden case

the Microcomputer Kit 14 (MK 14) was Sinclair's (at that time called "Science of Cambridge”) first computer. Based on the National Semiconductor SC/MP processor, the MK 14's capabilities were minimal by today's standards - modern digital watches are considerably more powerful!

Despite the MK 14's severe limitations, it was one of the most important British computers ever produced. Its success in finding a previously untapped market was not lost on either Sinclair or his employees, notably Chris Curry, soon to break away and establish Acorn. Without the MK 14, there probably would never have been a ZX81, Spectrum, BBC Micro or Archimedes, and the British computer scene would have been very different.

The MK14 was a computer kit sold by Science of Cambridge of the United Kingdom, first introduced in 1977 for UK£39.95. The MK14 eventually sold over 50,000 units. It used a National Semiconductor SC/MP CPU (INS8060), 256 bytes of random access memory (RAM) which was directly expandable to 640 bytes on board and 2170 bytes total. It used an 8 or 9 red light-emitting diode (LED) seven segment display, there was also optional VDU supporting 32×16 text or 64×64 graphics. Input and output was a 20 key keyboard and reset switch, with an optional 128 bytes of RAM and 16 I/O lines available by adding an INS8154N RAM/IO chip. Cassette-based and PROM storage were optional extras, a sound card was not included but a design for one was provided.

The MK14 specification :-

1/2k ROM Monitor
256 bytes RAM (expandable to 640 bytes on board and 2170 bytes total)
8 (or 9) Red LED seven segment display.
20 key keyboard and reset switch
Optional 16 I/O lines available by adding a IC
No sound card (design provided)
No backing store (cassette and PROM storage an optional extra)
Optional VDU supporting 32x16 text or 64x64 graphics

"This Science of Cambridge MK14 system - this very early kit boasted a 100KHz 4-bit SC/MP processor with 256 bytes of RAM. I put it in a case with a better keypad & display and slightly improved it - it was used for medical research in Oxford in the very late 1970s."

The expansion was an INS8154D RAM Input/Output Chip is an LSI device which provides random access memory and Peripheral interfacing for microcomputer system. The RAM portion contains 1024 bits of static RAM organised as 128x8.

This MK14 was very generously donated by Tim Bergal

Manufacturer: Sinclair
Date: 1977

Science of Cambridge MK14 + Memory Expansion in wooden case Manuals:

Item Manufacturer Date
SC/MP Processor Applications Handbook (MK14) National Semiconductors 1977
Science of Cambridge MK14 - Training Manual Sinclair 1977
MK14 Circuit Board Layout Diagram Sinclair 1978
MK14 Circuit Diagram Sinclair 1978
MK14 Manual update Revised Monitor Sinclair 1978
MK14 Manual update Tape Interface Sinclair 1978
MK14 Manual update Writing A Program Sinclair 1978
MK14 Manual update Addendum Sinclair 1978

Science of Cambridge MK14 + Memory Expansion in wooden case Articles:

Item Manufacturer Date
Memories - Early Computing with the Science of Cambridge MK14 and the SIB (Small Is Beautiful) Computer March 2013

Magazines RELATED to Science of Cambridge MK14 + Memory Expansion in wooden case in our Library

Item Manufacturer Date
Personal Computer World - May 1978 - First Issue May 1978
Personal Computer World - June 1978 - Issue 2 June 1978
Personal Computer World - July 1978 - Issue 3 July 1978
Practical Computing - November 1978 November 1978
Personal Computer World - December 1978 December 1978
Personal Computer World - September 1980 September 1980
Home Computing: Games Programs Summer 1981 Modmags July 1981

Other Systems Related To Science of Cambridge MK14 + Memory Expansion in wooden case:

Item Manufacturer Date
White Replica ZX Spectrum (Millionth Edition) Sinclair Unknown
Science of Cambridge MK14 + Original Keyboard Sinclair 1977
Science of Cambridge MK14 Sinclair 1977
Science of Cambridge MK14 - Original Kit Sinclair 1977
Sinclair ZX80 Updated to ZX81 Sinclair 1980
Sinclair ZX80 Sinclair 1st June 1980
Sinclair ZX81 Kit Sinclair 1981
Sinclair ZX81 Issue One Sinclair 5th March 1981
Sinclair ZX81 (Signed) Sinclair 5th March 1981
Sinclair ZX81 with Custom Case/Keyboard Sinclair 5th March 1981
Sinclair ZX Spectrum Console Sinclair 1982
Timex Sinclair 1000 Sinclair 1982
Early Sinclair ZX Spectrum Computer Sinclair 1982
Prototype Issue 2 ZX Spectrum Sinclair 1982
Sinclair ZX Spectrum Console Sinclair 1982
Sinclair TS2000 Sinclair 1982
Timex Sinclair 1000 Sinclair 1982
Sinclair ZX Spectrum 48k Sinclair 1st March 1982
Sinclair ZX Spectrum 16K Sinclair 1st March 1982
Sinclair ZX Spectrum Case (Signed) Sinclair 1st March 1982
Sinclair QL Sinclair 1984
Sinclair QL + SchÖn Keyboard Sinclair 1984
Sinclair QL (Property of Sinclair) Sinclair 1984
Sinclair QL (Signed) Sinclair 1984
Sinclair QL (US) Sinclair 1984
Sinclair ZX Spectrum+ Sinclair 1st June 1984
Sinclair ZX Spectrum +2 Sinclair 1986
Sinclair ZX Spectrum 128 Sinclair January 1986
Sinclair ZX Spectrum 128 Sinclair 1st June 1986
Cambridge Z88 Sinclair 1987
Sinclair ZX Spectrum +3 Sinclair 1st June 1987
Sinclair ZX Spectrum +3 (Currys Box) Sinclair 1st June 1987
Sinclair PC200 Sinclair 1988

This exhibit has a reference ID of CH28552. Please quote this reference ID in any communication with the Centre for Computing History.

 

Science of Cambridge MK14 + Memory Expansion in wooden case


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