Name: Data Director more
Manufacturer: Hirst Electronics
Price: £29.95
Blurb: Transforms the task of loading and saving from a chore to a delight. Small external box between the Speccy and the cassette recorder.
Source: Your Spectrum issue 18

Name: Datafax Disk System more
Manufacturer: Statacom Distribution
Price: £245.00
Blurb: Interface supports 3 and 5.25 drives. up to 200k storage. External DOS uses 8k of memory. Built-in reset button.
Source: Your Spectrum issue 8
Note: This interface was used in the Statacom Disk System.

Name: Datafax Spectrum Disk Interface more
Manufacturer: Statacom Distribution
Price: £75.00

Name: Datamate more
Manufacturer: Procomm Systems
Blurb: Cure Load/Save problems with this easy to use unit. Also includes a 'beep' ampliphier.
Source: ZX Computing Aug/Sep 83

Name: Datapen more
Manufacturer: Datapen Microtechnology Ltd
Price: £29.00
Blurb: Lightpen system. Draw direct to screen.
Source: Your Spectrum issue 17

Name: Data Recorder more
Manufacturer: Meow Micros
Price: £24.95
Blurb: Fully compatable (or your money back) cassette recorder for your Spectrum.
Source: ZX Computing Arp/May 84

Name: DataSpectrum more
Manufacturer: Miracle Technology
Price: £47.09
Blurb: Interface to connect a modem to your Spectrum.
Source: Your Spectrum issue 18

Name: Datel 3 Channel Sound Synthesiser more
Manufacturer: Datel Electronics
Price: £19.99
Blurb: 3 channel sound interface.
Source: Your Sinclair - Sep 89

Name: Datel Demagnetiser more
Manufacturer: Datel Electronics
Price: £9.99
Blurb: Loading problems ? Your tape heads may need demagnetising. Its a cleaner and demagnetiser built into a cassette.
Source: Your Sinclair Aug 88

Name: Datel Games Ace more
Manufacturer: Datel Electronics
Price: £10.99
Blurb: Allows any 9 pin joystick to be used with the Spectrum. Puts sound through TV speaker.
Source: Sinclair User Dec 88

Name: Datel Genius Mouse more
Manufacturer: Datel Electronics
Price: £49.99
Blurb: High resolution, two button mouse. Complete with interface and OCP Art Studio software.
Source: Your Sinclair Nov 89

Name: Datel Inter Printer more
Manufacturer: Datel Electronics
Price: £34.99
Blurb: Centronics printer interface.
Source: Crash 11 (Dec 84)
Note: Came with the Centronics Printer Software tape.

Name: Datel Lightwriter more
Manufacturer: Datel Electronics
Price: £16.99
Blurb: Create superb graphics with this lightpen.
Source: Your Spectrum issue 17
Note: Came with the Lightwriter tape.

Name: Datel Ramprint more
Manufacturer: Datel Electronics
Price: £34.99
Blurb: The ultimate printer interface with built-in word processor (RamWrite). Works with any standard centronics printers.
Source: Your Sinclair Nov 89

Name: Datel Robotarm more
Manufacturer: Datel Electronics
Price: £49.99
Blurb: Full function 5 axis movement. Includes standard grip jaw, magnetic finger, Shovel attachment and stabilising legs.
Source: Sinclair User Dec 88
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Name: Datel Snapshot more
Manufacturer: Datel Electronics
Price: £29.99
Blurb: Transfer all your programs to microdrive or disk at the touch of a button. Datel's version of the Multiface.
Source: Your Sinclair Oct 86
Note: Datel later launched the follow-up, Snapshot 2.

Name: Datel Snapshot 2 more
Manufacturer: Datel Electronics
Price: £24.95
Blurb: Transfer all your programs to microdrive or disk at the touch of a button. Datel's version of the Multiface.

Name: Datel Switchable Joystick Interface more
Manufacturer: Datel Electronics
Price: £19.99
Blurb: Switches between Kempston, cursor and Interface 2 types.
Source: Your Spectrum issue 17

Name: Datel Turbo Ace more
Manufacturer: Datel Electronics
Price: £22.99
Blurb: Switchable joystick interface with sound booster.
Source: Crash 11 (Dec 84)

Name: Datel Vox Box more
Manufacturer: Datel Electronics
Price: £29.99
Blurb: Speech synthesizer with built in joystick interface. Uses allophone system. Sound output via TV speaker.
Source: Sinclair User May 84

Name: dB Spectrum+ more
Manufacturer: deciBells Electronics pvt Ltd
Note: An Indian clone of the ZX Spectrum+.

Name: DCP Interpack 1 more
Manufacturer: DCP Microdevelopments Ltd
Price: £43.43
Blurb: Part of the DCP Control System. The system consists of several packs and additions that can be linked together to form a very powerful external control unit for the likes of servo's, robots etc.. This module contains analogue and digital inputs. An 8bit TTL input and an 8bit TTL output port.
Source: Sinclair User Dec 86

Name: DCP Interpack 2 more
Manufacturer: DCP Microdevelopments Ltd
Price: £34.74
Blurb: Part of the DCP Control System. This module contains an eight-switch contact for digital inputs, six SPDT relays and 15way expansion bus.
Source: Sinclair User Dec 86

Name: DCP Interpack 3 more
Manufacturer: DCP Microdevelopments Ltd
Price: £43.43
Blurb: The stepper motor control. Can drive up to 3 12v two-phase motors. Also has eight buffered switch contacts.
Source: Sinclair User Dec 86

Name: DCP Interpack ADC Pack more
Manufacturer: DCP Microdevelopments Ltd
Price: £21.70
Blurb: Fast analogue to digital converter.
Source: Sinclair User Dec 86

Name: DCP Interpack DAC Pack more
Manufacturer: DCP Microdevelopments Ltd
Price: £21.70
Blurb: Fast digital to analogue converter.
Source: Sinclair User Dec 86

Name: DCP Interpack Intercard more
Manufacturer: DCP Microdevelopments Ltd
Price: £13.00
Blurb: Used to connect Interpacks together.
Source: Sinclair User Dec 86

Name: DCP Interpack Invertabus more
Manufacturer: DCP Microdevelopments Ltd
Price: £4.30
Blurb: Connects two ADC or DAC packs together.
Source: Sinclair User Dec 86

Name: DCP Interpack Powerbus more
Manufacturer: DCP Microdevelopments Ltd
Price: £17.35
Blurb: Boosts power when several Interpacks are used together.
Source: Sinclair User Dec 86

Name: Defender Light Gun more
Manufacturer: Cheetah Marketing Ltd
Price: £24.95
Blurb: Now you can fire a plastic gun at the telly ! Includes several games like Bronx Street Cop and Billy the Kid.
Came with the Defender Light Gun tape.
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Name: Delta-Ram Kit more
Manufacturer: Delta Research Ltd
Price: £33.00 (issue 1) / £26.00 (issue 2)
Blurb: Internal Ram upgrade for 16k machines. Easy to install.
Source: Sinclair User Oct 83

Name: Desktop Console more
Manufacturer: Computerlock
Price: £22.00
Blurb: TV/Monitor stand that incooparates your Spectrum, PSU and tape.
Source: Sinclair User Oct 83

Name: Digimouse more
Manufacturer: Nidd Valley Micro Products Ltd
Price: £34.95 (interface £14.95)
Blurb: Mouse that uses digital pulse output for more accurate movement. Requires one of two interfaces to work, The basic low-cost version (£14.95) or the professional version incorporating a Centronics port and direct link to the Nidd Valley programmable keypad. (£34.95)
Source: PCW Feb 86

Name: Digit more
Manufacturer: Frel Ltd
Price: £9.50
Blurb: Keyboard enhancer for Spectrum Plus. Replaces the rubber membrane with a tactile feeling alternative.
Source: Sinclair User June 86

Name: Digital Sound Sampler more
Manufacturer: Datel Electronics
Price: £49.99
Blurb: Digital sampling technology on your Spectrum. 8bit sampling and playback of any sound.
Source: Your Spectrum issue 17

Name: Disciple Interface more
Manufacturer: Rockford Products (Miles Gordon Technology)
Price: £86.59
Blurb: Disk interface allows up to 16mb of storage on 2 drives. Loads full 48k program in 3.5 seconds. Compatible with any standard drive, double or single density. Snapshot button to save your programs to disk. Printer interface. Dual joystick ports. (Sinclair/Kempston). Networking feature to allow the Disciple to act as file server for upto 64 other Spectrums.
Source: Your Sinclair Jan 87
Note: Runs the GDOS operating system.
Comes with a Disciple System Tape.
The ROM image(s) is/are available at Phil Kendall's The Spectrum ROMs Collection.

Name: DK'Tronics 3 Channel Sound Synthesiser more
Manufacturer: DK'Tronics Ltd
Price: £29.95
Blurb: Incorporates a Beep amplifier and 3 channel sound synthesiser.
"The 3 channel sound synthesiser adds a totally new dimension to sound on your Spectrum. It allows you to program your own music with harmonies, explosions, zaps, chimes, whistles and an infinite range of other sounds over 8 octaves. Based on the popular AY-3-8912 sound chip it gives you complete control (from Basic or M/C) over 3 channels of tone/or white noise, plus envelope and volume control. It comes with its own pod mounted 4inch speaker."
Source: Sinclair User Dec 84

Name: DK'Tronics Beep Audio Amp more
Manufacturer: DK'Tronics Ltd
Price: £14.95
Blurb: Amplifier interface with pod mounted 4inch speaker and volume control. Looks much like the 3 Channel Sound, but doesn't have the sound chip.
Source: Sinclair User August 84

Name: DK'Tronics Dual Port Joystick Interface more
Manufacturer: DK'Tronics Ltd
Price: £13.00
Blurb: Dual port joystick interface.
"The first port simulates 6,7,8,9 & 0 keys. The second port simulates IN(31) command" - Kempston.
Source: Your Computer March 85

Name: DK'Tronics Games Controller more
Manufacturer: DK'Tronics Ltd
Price: £12.95
Blurb: Standard joystick interface (Kempston) with the added feature of a 'slowdown' control for games that are just too hard for you.
Source: Your Computer May 85

Name: DK'Tronics Joystick & Interface more
Manufacturer: DK'Tronics Ltd
Price: £22.95
Blurb: Winning is within your grasp ! Cursor & Kempston compatible.
Source: Sinclair User Dec 83

Name: DK'Tronics Keyboard more
Manufacturer: DK'Tronics Ltd
Price: £45.00
Blurb: "The DK Microdrive compatible keyboard is the best selling keyboard in the world and is used by 10% of all Spectrum users. It is Microdrive compatible and offers more key functions than any other keyboard in its price range. The stepped keys and space bar make it even easier to use. It is constructed from high density black ABS and has 52 keys and a full width space bar. A separate numeric keypad of 12 red keys, including a single entry 'delete' plus single entry decimal point, facilitate fast data entry."
Source: Sinclair User Dec 83
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Name: DK'Tronics Light Pen more
Manufacturer: DK'Tronics Ltd
Price: £19.95
Blurb: Draw in high resolution on your TV screen.
"This highly succesful Light Pen fits neatly onto the rear of the computer. The operating software now runs faster and supports 16 pre-defined instructions. You can change all the colours (border, paper, ink), draw circles, arcs, boxes, lines and insert text onto the screen. There are also features to draw freehand and animate on the 48k Spectrum, you can retain and animate 5 screens. You can also use the machine code on its own in your own programs."
Source: Sinclair User Dec 83
Note: Came with the DK'Tronics Light Pen tape.

Name: DK'Tronics Parallel Centronics Interface more
Manufacturer: DK'Tronics Ltd
Price: £39.95
Blurb: Allows any printer with a centronics interface to be connected to you Spectrum. Uses standard print commands.
Source: Sinclair User March 85
Note: Came with the Centronics Printer Software tape.

Name: DK'Tronics Programmable Joystick Interface more
Manufacturer: DK'Tronics Ltd
Price: £22.95
Blurb: "Now you can run any software from any supplier with the DK'tronics fully programmable joystick interface. It comes complete with machine code software and can be programmed in seconds to give full 8 directional joystick movements."
Source: Sinclair User March 85
Note: Came with the Programmable Joystick Software tape.

Name: DK'Tronics Spectra-Sound more
Manufacturer: DK'Tronics Ltd
Price: £9.95
Blurb: Fully amplied sound via your TV. Fits inside your Spectrum.
Source: Sinclair User Dec 83

Name: DK'Tronics Speech Synthesiser more
Manufacturer: DK'Tronics Ltd
Price: £24.95
Blurb: Speech synthesiser using the SLO/256 chip.
Source: Your Computer March 85
Note: Came with the Speech Software tape.

Name: Dorsch Centronics Interface more
Manufacturer: Dorsch - Elektronic
Blurb: Centronics Interface

Name: Doubler MkII more
Manufacturer: Evesham Micro Centre
Price: £14.95
Blurb: Back up any program on the Spectrum. Requires 2 tape decks.
Source: ZX Computing Aug/Sep 85
Note: Came with the Doubler MkII tape.

Name: Dove Disk Drive Interface more
Manufacturer: Dove Microtronix Ltd
Price: £249.00
Blurb:
Source: Sinclair User Oct 84

Name: Dove Joystick Interface more
Manufacturer: Dove Microtronix Ltd
Price: £9.95
Blurb: Standard joystick interface. Kempston compatible.
Source: Sinclair User Oct 84

Name: Downsway Programable Joystick Interface more
Manufacturer: Downsway Electronics
Price: £22.95
Blurb: Simply move the stick and press the appropriate key to program.
Source: ZX Computing Feb/Mar 84