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Sinclair QL

The Sinclair QL (QL standing for Quantum Leap), was a personal computer launched by in 1984, it was lauched as a successor to the ZX Spectrum. The QL was aimed at the hobbyist and small business users and markets, but failed to achieve commercial success.

The QL was originally conceived in 1981 under the code-name ZX83, as a portable computer for business users, with a built-in flat-screen CRT display and internal modem. As development progressed, and ZX83 became ZX84, it eventually became clear that the portability features were over-ambitious and the specification was reduced to a conventional desktop configuration.

Based on a Motorola 68008 processor clocked at 7.5 MHz, the QL included 128 KB of RAM (officially expandable to 640 KB) and could be connected to a monitor or TV for display. Two built-in Microdrive tape-loop cartridge drives (first seen as a peripheral for the ZX Spectrum) provided mass storage, in place of the more expensive floppy disk drives found on similar systems of the era. Interfaces included an expansion slot, ROM cartridge socket, dual RS-232 ports, proprietary QLAN local area network ports, dual joystick ports and an external Microdrive bus. Two video modes were available, 256×256 pixels with 8 RGB colours and per-pixel flashing, or 512×256 pixels with four colours (black, red, green and white). Both screen modes used a 32 KB framebuffer in main memory.

Manufacturer: Sinclair
Date: 1984



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Sinclair QL Manuals:

Item Manufacturer Date
QDOS (for the QL) Technical Notes Sinclair Unknown
SuperQBoard Manual Sandy 1985
Sinclair QL Macro Assembler - User's Guide Sinclair 1985

Other Systems Related To Sinclair QL:

Item Manufacturer Date
Prototype of MK14 Sinclair 1977
Science of Cambridge MK 14 + Original Keyboard Sinclair 1977
Science of Cambridge MK 14 - Original Kit Sinclair 1977
Science of Cambridge MK14 + Memory Expansion in wooden case Sinclair 1977
Science of Cambridge MK14 Sinclair 1977
Sinclair ZX80 8K Basic Sinclair 1980
Sinclair ZX81 with Basic EPROM Sinclair 1980
Sinclair ZX80 Prototype PDZ 4732 Basic ROM - Nine Tiles Sinclair 1980
Sinclair ZX80 Updated to ZX81 Sinclair 1980
Sinclair ZX80 Sinclair 1st June 1980
Sinclair ZX81 Kit Sinclair 1981
Sinclair ZX Spectrum Prototype Sinclair 1981
Sinclair ZX81 Issue One Sinclair 1981
Sinclair ZX81 - Signed by Rick Dickinson Sinclair 5th March 1981
Sinclair ZX81 with Custom Case/Keyboard Sinclair 5th March 1981
Argentinian Sinclair Spectrum Sinclair 1982
Sinclair Spectrum with Homemade Keyboard Sinclair 1982
White Replica ZX Spectrum (Millionth Edition) Sinclair 1982
Early Sinclair ZX Spectrum Computer Sinclair 1982
Timex Sinclair 1000 Sinclair 1982
Sinclair ZX Spectrum Console Sinclair 1982
Sinclair ZX Spectrum Console Sinclair 1982
ZX Spectrum Issue 2 With ULA Modification Sinclair 1982
Timex Sinclair 1500 Sinclair 1982
Sinclair ZX Spectrum Case (Signed) Sinclair 1st March 1982
Sinclair ZX Spectrum 48k Sinclair 1st March 1982
Sinclair ZX Spectrum 16K Sinclair 1st March 1982
Sinclair ZX Spectrum Computer - Early Issue Sinclair 23rd April 1982
Timex Sinclair 2068 Timex Sinclair November 1983 to 1989
Sinclair QL + SchÖn Keyboard Sinclair 1984
Investronica Sinclair Spectrum Sinclair 1984
Sinclair QL (German) Sinclair 1984
Sinclair QL (Signed) Sinclair 1984
Sinclair QL (US) Sinclair 1984
Sinclair QL (Property of Sinclair) Sinclair 1984
Sinclair ZX Spectrum+ Sinclair 1st June 1984
Sinclair ZX Spectrum +2 Sinclair 1986
Sinclair ZX Spectrum 128 Sinclair January 1986
Cambridge Z88 All In One Pack Sinclair 1987
Cambridge Z88 Sinclair 1987
Sinclair ZX Spectrum +3 (Currys Box) Sinclair 1st June 1987
Sinclair ZX Spectrum +3 Sinclair 1st June 1987
Sinclair PC200 Sinclair 1988
Cambridge Z88 With PC Link Kit Sinclair 1988

This exhibit has a reference ID of CH655. Please quote this reference ID in any communication with the Centre for Computing History.

 

Sinclair QL

  Book Archive   [2]
  Games Archive   [11]
  Software Archive   [9]
  Type-in Listings   [1]
  Peripherals   [21]

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