Name: XK System more
Manufacturer: Stephen Adams
Price: £14 + Ram (DIY kit) or £74 for full installation.
Blurb: Gives up to 64k of internal RAM in your Spectrum. Software control of paging.
Source: Your Spectrum issue 8

Name: XRI Micon more
Manufacturer: XRI Systems
Price: £99.00
Blurb: MIDI interface with 1 input, 2 outputs and a drum box synchronisation socket. Complete with software that will allow up to eight synchronised sequences and 26,200 notes.
Source: Your Sinclair July 86

Name: Zeaker Micro-Robot more
Manufacturer: Colne Robotics Co Ltd
Price: £69.50
Blurb: Spectrum controled, 2 wheeled robot.
Source: ZX Computing Aug/Sep 83
Note: Created by David Buckley.

Name: Zeal Sound Booster more
Manufacturer: Zeal Marketing Ltd
Price: £14.99
Blurb: Clear sound with volume control.
Source: Sinclair User May 84

Name: Zero2 Robot more
Manufacturer: Intergalactic Robots Ltd
Price: Less than £100 claims the ad.
Blurb: Small robot, controled via any RS232 port on your Speccy.
Source: Your Spectrum issue 15. June 85
Note: Created by David Buckley.

Name: ZON X Soundbox more
Manufacturer: Bi-Pak Semiconductors
Price: £32.75
Blurb: "Make amazing sounds with your Spectrum." 8 octaves, 3 channels with full control over pitch, volume, tones and noise, all with envelope control. Usable in your own Basic or M/C programs. Because this devices used the A4 address space, it is not compatable with the Interface 1 and Micrdrive. Because this was originaly a ZX81 interface, a small additional board is required. It sits between the ZON X and the Spaccy, and conatins a 3.5Mhz oscillator to stabalise the frequency.
Source: Sinclair User Dec 83/Apr 83

Name: ZX Box more
Manufacturer: Interservice Electronics Ltd
Price: £9.95
Blurb: A Sound Investment. Bring arcade style sound to your Spectrum. Sound Amplifier.
Source: Sinclair User Oct 83

Name: ZX Interface I more
Manufacturer: Sinclair Research Ltd
Price: £49.95 (or £29.95 when purchased with one or more ZX Microdrives)
Blurb: Controls up to 7 Microdrives. Built-in RS232 interface. Network up to 64 Spectrums. This, along with the Microdrive, revolutionised the way that the Spectrum worked. For the first time, Spectrum owners could experience fast access times and super-fast loading.
Source: Sinclair User Oct 83
Note: An RS232 Lead was available separately.
The ROM image is available at Phil Kendall's The Spectrum ROMs Collection.
A complete disassembly of this ROM was published in the book Spectrum Shadow ROM Disassembly (Melbourne House).
The ZX Spectrum Expansion System comprised the ZX Interface I, a ZX Microdrive, plus a set of 4 cartridges: a Demo Cartridge, Games Cartridge, Business Cartridge, and an empty one.
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Name: ZX Interface II more
Manufacturer: Sinclair Research Ltd
Price: £19.05
Blurb: Rom cartridge interface with twin joystick ports.
Source: Sinclair User Dec 83
Note: Sinclair's second interface did not take off like the first one. This ROM interface was produced to try and keep up with the consoles. Instant loading ROM cartridges were produced for the interface, licenced by Sinclair. Only 10 titles were ever available:
- Planetoids (Sinclair Research Ltd)
- Space Raiders (Sinclair Research Ltd)
- Backgammon (Sinclair Research Ltd)
- Pssst (Ultimate Play The Game)
- Cookie (Ultimate Play The Game)
- Jetpac (Ultimate Play The Game)
- Tranz Am (Ultimate Play The Game)
- Hungry Horace (Sinclair Research Ltd)
- Horace and the Spiders (Sinclair Research Ltd)
- Chess (Sinclair Research Ltd)
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Name: ZX Loader Aid more
Manufacturer: Fulcrum Products
Price: £12.20
Blurb: Cure tape errors when loading. LED's indicate correct volume setting.
Source: ZX Computing Aug/Sep 83

Name: ZX Lprint more
Manufacturer: Euroelectronics
Price: £41.40
Blurb: Any Centronics printer can be used, as any graphics, user-defined characters and the like have to be programmed in by the user each printer has ways of doing graphics and special characters. The instructions are so simple that they are printed on the bottom of the unit.
Source: Sinclair User May 83
Note: A printer cable was available for £12.08

Name: ZX Lprint III more
Manufacturer: Euroelectronics
Price: £34.95
Blurb: THE ZX LPRINT III, from Euroelectronics is one of the most comprehensive printer interfaces available for the Spectrum. With a choice of both Centronics and RS232 in the one interface it will satisfy most users.
Source: Sinclair User Jul 84
Note: Serial and parallel cables were available for £9.95 each.

Name: ZX Microdrive more
Manufacturer: Sinclair Research Ltd
Price: £49.95
Blurb: Sinclair's mass storage device. Uses a tape loop to 'emulate' a disk drive, offers random access and fast loading. This device alone improved the Spectrum 100%, allowing 85k per cartridge. Loaded a typical 48k program in 9 seconds. (requires ZX Interface I)
Source: Sinclair User Oct 83
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Name: ZXM Soundbox more
Manufacturer: Timedata Ltd
Price: £29.95
Blurb: Sound box based on the 8912 chip. Includes twin joystick ports. Volume control, amplifier & speaker.
Source: Sinclair User Dec 83

Name: ZX Printer more
Manufacturer: Sinclair Research Ltd
Price: £39.95
Blurb: 50 characters/sec.
Source: Sinclair User Oct 83
Note: Also manufactured by Timex Computer Corp, as the Timex Sinclair 2040.

Name: ZXS Speech Synthesiser more
Manufacturer: Timedata Ltd
Price: £24.99
Blurb: Speech synthesis box. Needs ZXM to amplify sound.
Source: Sinclair User Dec 83

Name: ZX Spectrum 16K more
Manufacturer: Sinclair Research Ltd
Price: £125.00
Note: The ROM image is available at Phil Kendall's The Spectrum ROMs Collection.

Name: ZX Spectrum 48K more
Manufacturer: Sinclair Research Ltd
Price: £175.00
Note: The ROM image is available at Phil Kendall's The Spectrum ROMs Collection.

Name: ZX Spectrum+ more
Manufacturer: Sinclair Research Ltd
Price: £180.00
Note: The ROM image is available at Phil Kendall's The Spectrum ROMs Collection.

Name: ZX Spectrum 128K more
Manufacturer: Sinclair Research Ltd
Price: £179.95
Note: A separate numeric ZX Spectrum 128K Keypad was available as well.
The ROM image is available at Phil Kendall's The Spectrum ROMs Collection.

Name: ZX Spectrum 128K Keypad more
Manufacturer: Sinclair Research Ltd
Price: £19.95
Note: This numeric keypad was an optional expansion for the ZX Spectrum 128K.

Name: ZX Spectrum 128 +2 more
Manufacturer: Amstrad
Price: £149.00
Note: The ROM image is available at Phil Kendall's The Spectrum ROMs Collection.

Name: ZX Spectrum 128 +2a more
Manufacturer: Amstrad
Price: £149.00
Note: The ROM image is available at Phil Kendall's The Spectrum ROMs Collection.
You could also buy a special set, Police Pack, containing both a ZX Spectrum 128 +2a and 2 games.

Name: ZX Spectrum 128 +2b more
Manufacturer: Amstrad
Price: £149.00
Note: The ROM image is available at Phil Kendall's The Spectrum ROMs Collection.

Name: ZX Spectrum 128 +3 more
Manufacturer: Amstrad
Price: £249.00
Note: The ROM image is available at Phil Kendall's The Spectrum ROMs Collection.

Name: ZX Tapeloader more
Manufacturer: Elinca Products Ltd
Price: £14.99
Blurb: Trouble free loading and saving. Switchable load/save. Meter shows level. Filters cut out the noise to create the best signal possible.
Source: ZX Computing Oct/Nov 83