Name: CAD-Master Light Pen more
Manufacturer: Trojan Products
Year: 1984
Type: Graphics
Price: £17.25
Blurb: Create exciting graphics on screen.
Note: Came with the CAD-Master - Light Pen & Graphics Software tape.

Name: Cambridge Colt Joystick Interface more
Manufacturer: Cambridge Computing Research Ltd
Year: 1984
Type: Joystick
Price: £9.95
Blurb: Standard Kempston compatible joystick interface.

Name: Cambridge Extender Bar more
Manufacturer: Cambridge Computing Research Ltd
Year: 1984
Type: Add-on
Price: £4.95
Blurb: Extender bar (presumably at the back of the Spectrum), that incorporates a reset button.

Name: Cambridge Intelligent Interface more
Manufacturer: Cambridge Computing Research Ltd
Year: 1983
Type: Joystick
Price: £24.00
Blurb: Joystick interface. (includes tape) 1K on board memory. Own rear edge connector for printers. Compatible with all standard joysticks.

Name: Cambridge Intelligent Joystick more
Manufacturer: Cambridge Computing Research Ltd
Year: 1983
Type: Joystick
Price: £7.00
Blurb: At last a joystick that works ! Cambridge Computing brings you the first programmable joystick at a price you can afford. (requires interface & tape)
Note: Came with the Cambridge Intelligent Joystick tape.

Name: Cambridge Intelligent Printer Interface (advanced) more
Manufacturer: Cambridge Computing Research Ltd
Year: 1984
Type: Printing
Price: £49.95
Blurb: Includes all features of the standard version + Different sized prints. Grey scale. Downloadable fonts.

Name: Cambridge Intelligent Printer Interface (standard) more
Manufacturer: Cambridge Computing Research Ltd
Year: 1984
Type: Printing
Price: £39.95
Blurb: Centonics printer interface. Compatible with all standard print commands. Driver software stored in ROM.

Name: Cambridge Joystick & Interface more
Manufacturer: Cambridge Computing Ltd
Year: 1983
Type: Joystick
Price: £34.90

Name: Cartridge Tidy more
Manufacturer: Quantum Leap Systems
Year: 1984
Type: Miscellaneous
Price: £7.90

Name: Casstrol more
Manufacturer: Derek Fowler Associates
Year: 1983
Type: Cassette
Price: £11.95

Name: CCI Lightpen more
Manufacturer: Custom Cables International Ltd
Year: 1984
Type: Graphics
Price: £15.00
Blurb: Light pen. Software allows screens to be stored and recalled to create animations.

Name: CCI Programmable Joystick Interface more
Manufacturer: Custom Cables International Ltd
Year: 1984
Type: Joystick
Price: £15.00
Blurb: Programmable via a short Basic program that allows keys to be mapped to the joystick movements.

Name: Centronics Interface more
Manufacturer: Advanced Digital Systems Ltd
Year: 1983
Type: Printing
Price: £34.50
Blurb: Centronics printer interface.Supports all printer commands from BASIC.

Name: Challenge 836 more
Manufacturer: Challenge Research Ltd
Year: 1984
Type: Cassette
Price: £36.95

Name: Challenge Sprint more
Manufacturer: Challenge Research Ltd
Year: 1984
Type: Cassette
Price: £64.95
Blurb: Looks like a standard cassette recorder, but plugs into the user port and gives up to 4 times load/save speed. Uses normal cassette tapes and is fully compatible with all existing software. Average 48K program loads in 75 seconds. Also includes a replacement ROM with faster load/save routines. It later became apparent that newer 'turbo-loader' software such as the older Ultimate titles, were not compatible. (Feb 85)
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Name: Challenge Sprint Mk II more
Manufacturer: Macway Ltd
Year: 1985
Type: Cassette
Price: £69.95
Blurb: Same as the original Sprint but with Interface 1 compatibility.

Name: Chatterbox more
Manufacturer: William Stuart Systems Ltd
Year: 1983
Type: Sound/Speech
Price: £49.00
Blurb: Speech synthesis interface. Genuine phonetic synthesis. Unlimited vocabulary. Self contained speaker/amp.

Name: Chatterbox II more
Manufacturer: William Stuart Systems Ltd
Year: 1985
Type: Sound/Speech
Price: £39.00
Blurb: "It can say anything. Genuine phoneme synthesis - not just recorded speech - hense unlimited vocabulary. Programmable pitch for more natural intonation. Solid tone cabinet for quality sound. Internal BEEP music amplifier. Expansion socket for 'Big Ears' voice recognition system."

Name: Cheetah 32K Rampack more
Manufacturer: Cheetah Marketing Ltd
Year: 1983
Type: RAM/ROM
Price: £39.95
Blurb: A RAM upgrade to 48K. Simply plugs into the rear connector and gives full 48K.

Name: Cheetah 68FX1 Keyboard more
Manufacturer: Cheetah Marketing Ltd
Year: 1984
Type: Keyboard
Price: £59.95
Blurb: 65 key full travel keyboard with single shift keys and full length space bar. 13 single key functions. True shift-lock. Space for Interface 1 inside.
Note: This keyboard is sold by Cheetah, made by London Microtech Ltd and marketed by Fox Electronics.

Name: Cheetah DP5 Drum Kit more
Manufacturer: Cheetah Marketing Ltd
Year: 1987
Type: Music
Price: £160.00

Name: Cheetah Hi-Stak Feet more
Manufacturer: Cheetah Marketing Ltd
Year: 1985
Type: Miscellaneous
Price: £2.99
Blurb: Angled plastic feet for your Spectrum.
Note: A similar device by the same name was produced by a company called Warp Factor Eight of Herts. and advertised in Sinclair User Feb 83.

Name: Cheetah Mega-Sound more
Manufacturer: Cheetah Marketing Ltd
Year: 1985
Type: Sound/Speech
Price: £10.95
Blurb: Amplifies your sound via the TV speaker.

Name: Cheetah MIDI Interface more
Manufacturer: Cheetah Marketing Ltd
Year: 1987
Type: Music
Price: £49.95
Blurb: MIDI in/out/through. MIDI delay. Control any MIDI instrument. Forward & reverse sequence playback.
Note: Came with the Cheetah MIDI Interface system tape.

Name: Cheetah MK5 Mini Interface more
Manufacturer: Cheetah Marketing Ltd
Year: 1986
Type: Music
Blurb: The Cheetah MK5 Mini Interface is an interface to allow connection of the Cheetah MK5 MIDI Keyboard to a suitable computer, creating a powerful musical instrument with many exciting capabilities.
Note: Came with the Mini Synth, The tape.

Name: Cheetah MK5 MIDI Keyboard more
Manufacturer: Cheetah Marketing Ltd
Year: 1987
Type: Music
Price: £99.95

Name: Cheetah Sound Sampler more
Manufacturer: Cheetah Marketing Ltd
Year: 1986
Type: Sound/Speech
Price: £44.95
Blurb: Sound sampler unit with microphone. Allows mixing of samples, forward or reverse, edit, reverb and echo effects. 17.5Khz bandwidth.
Note: Came with the Cheetah Sound Sampler tape.

Name: Cheetah SpecDrum more
Manufacturer: Cheetah Marketing Ltd
Year: 1985
Type: Music
Price: £29.95
Blurb: Digital drum system for your Spectrum. 8 digital drum sounds. True digital drum machine. Extra sounds can be loaded from tape. Real time or on-screen programming. Store over 1000 rythms.
Note: Came with the SpecDrum system tape.
Three additional sound kits were made: SpecDrum - Afro Kit, SpecDrum - Electro Kit and SpecDrum - Latin Kit.
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Name: Cheetah Spectrum Joystick Interface more
Manufacturer: Cheetah Marketing Ltd
Year: 1985
Type: Joystick
Price: £11.50

Name: Cheetah Sweet Talker more
Manufacturer: Cheetah Marketing Ltd
Year: 1983
Type: Sound/Speech
Price: £29.75
Blurb: Make your Spectrum talk ! A speech interface based on the Allophone system.
Note: Came with the Chatbox tape.

Name: Chroma 1 Monitor more
Manufacturer: Chromagraphica
Year: 1984
Type: Monitor/VDU
Price: £249.95 (extra £17.50 for sound) (£28.95 for Speccy converter)
Blurb: High res 14" colour monitor (585x895)

Name: Clive Drive more
Manufacturer: Ergo Systems Ltd
Year: 1988
Type: Disk
Price: £59.95
Blurb: Disk interface with drive and printer port. Responds to all standard drive commands. Uses double sided drive allowing 50K per side. (100K per disk). Average loading time was 13 seconds.
Note: An optional Clive Printer was also available.
This device was later sold by Video Vault, with an added back-up button. (Nov 89)

Name: Clive Printer more
Manufacturer: Ergo Systems Ltd
Year: 1988
Type: Printing
Price: £99.95
Blurb: 80 character thermal printer. Dot addressable graphics. Inverse option. Expanded print option (160 chars). Uni or Bi directional.
Note: This was a option when buying the Clive Drive, and could not be used without it.

Name: CM14 Colour Monitor more
Manufacturer: Fidelity
Year: 1983
Type: Monitor/VDU
Price: £228.00

Name: Cobra RS232 Interface more
Manufacturer: Cobra Technology Ltd
Year: 1983
Type: Telecom/Network
Price: £26.85
Blurb: Standard RS232 interface.

Name: Cobra Power Supply Buffer more
Manufacturer: Cobra Technology Ltd
Year: 1983
Type: Miscellaneous
Price: £12.50

Name: Co-Der more
Manufacturer: Jiles Electronics
Year: 1983
Type: Miscellaneous
Price: £99.95
Blurb: Allows tape to tape copying by connecting two recorders to the unit.

Name: Cole RS232 more
Manufacturer: Cole Computing
Year: 1983
Type: Telecom/Network
Price: £12.00
Blurb: 110/300 baud RS232 output port.

Name: Comcon Control Unit more
Manufacturer: A&C Computers
Year: 1984
Type: Add-on
Price: £24.50

Name: Comcon Programmable Joystick Interface more
Manufacturer: Frel Ltd
Year: 1984
Type: Joystick
Price: £17.95
Blurb: Programmable joystick interface for the Spectrum.

Name: Comcon Twin more
Manufacturer: Frel Ltd
Year: 1986
Type: Joystick
Price: £22.95
Blurb: Twin version of the Comcon Programmable, Having two ports.

Name: Commander 3 Joystick Interface more
Manufacturer: Bud Computers Ltd
Year: 1985
Type: Joystick
Price: £14.95

Name: Compact Mono Tape Recorder more
Manufacturer: Orion Software [1]
Year: 1983
Type: Cassette
Price: £19.50

Name: Computer Case more
Manufacturer: Computer Add-ons
Year: 1984
Type: Miscellaneous
Price: £11.95

Name: Computer Case more
Manufacturer: Treetop Designs
Year: 1983
Type: Miscellaneous
Price: £44.95

Name: Computer Case HC/1 more
Manufacturer: PAS Computer Products
Year: 1984
Type: Miscellaneous
Price: £13.25

Name: Computer Cover more
Manufacturer: Allcom
Year: 1985
Type: Miscellaneous
Price: £4.95

Name: Computer Cover and Stand more
Manufacturer: Computer Cases & Covers
Year: 1983
Type: Miscellaneous
Price: £6.99

Name: Computilt Stand more
Manufacturer: Computer Add-ons
Year: 1983
Type: Miscellaneous
Price: £4.50
Blurb: Designed to tilt your Spectrum to a better working position.

Name: Concept Keyboard more
Manufacturer: Star Microterminals
Year: 1983
Type: Keyboard
Price: £113.85

Name: Cool-It Unit more
Manufacturer: Kelwood Computer Cases
Year: 1984
Type: Miscellaneous
Price: £11.85
Blurb: Takes the heat out of your Spectrum. Lets your machine run cooler.

Name: CP48 more
Manufacturer: Citadel Products
Year: 1983
Type: RAM/ROM
Price: £23.95
Blurb: Internal RAM upgrade for your Spectrum. Gives 48K.

Name: CPD8300 Computer Program Data Recorder more
Manufacturer: WH Smith
Year: 1985
Type: Cassette
Price: £35.00

Name: Cramic-SP more
Manufacturer: Camel Products
Year: 1985
Type: RAM/ROM
Price: £89.95
Blurb: Software paged 16K non-volatile RAM. Store programs quickly and simply.

Name: Crash Box more
Manufacturer: Epsilon Products
Year: 1984
Type: Add-on
Price: £6.50

Name: Crescent 128 Quick Disk more
Manufacturer: Servicon Dynamics Ltd
Year: 1985
Type: Disk
Price: £117.44 (drive) £152.69 (interface)
Blurb: Another alternative to the microdrive claiming upto 20 times the speed. Stores 128K of data and can read 65K in 4-8 seconds. Has RS232 port and RGB port. Allows only 2 drives to be attached to the interface. An enhanced version (256i) could store 256K and cost £229.90

Name: Crescent 401 + 2000DFS more
Manufacturer: Servicon Dynamics Ltd
Year: 1985
Type: Disk
Price: £129.95 (£199.95 with DFS os)
Blurb: Disk interface supporting 3" and 5.25" drives. DFS features upto 78 files (200K). Extended Basic commands. True random access. Uses 8K of RAM.

Name: CS-DISK Interface more
Manufacturer: Circuit Design
Year: 1985
Type: Disk
Blurb: Also known as the CD-DISK, it is able to control 4 standard double-density floppy drives as well as equips the Spectrum with CP/M compatibility. Furthermore it contains a Centronics printer interface and an interface for an IBM PC keyboard (which only works in CP/M). Formatting, copying and so on is done through CP/M programs.

Name: Currah MicroSlot more
Manufacturer: Currah Computer Components Ltd
Year: 1984
Type: Add-on
Price: £14.95
Blurb: Splits your expansion bus into two allowing two peripherals to be fitted at once.

Name: Currah MicroSource more
Manufacturer: Currah Computer Components Ltd
Year: 1986
Type: Add-on
Price: £44.50
Blurb: FORTH and Assembler cartridge with debug.
Note: The ROM image is available at Phil Kendall's The Spectrum ROMs Collection.
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Name: Currah MicroSpeech more
Manufacturer: Currah Computer Components Ltd
Year: 1983
Type: Sound/Speech
Price: £29.95
Blurb: Speech synthesis box using the SP0256-AL2 speech processor. Outputs sound via the TV.
Note: The ROM image is available at Phil Kendall's The Spectrum ROMs Collection.

Name: Cyborg Disk Drive more
Manufacturer: Haytech France
Year: 1984
Type: Disk
Price: £199.99