Sinclair ZX Spectrum 128

Sinclair developed the ZX Spectrum 128 (code-named Derby) in conjunction with their Spanish distributor Investrónica. Investrónica had helped adapt the ZX Spectrum+ to the Spanish market after the Spanish government introduced a special tax on all computers with 64 KB RAM or less which did not support the Spanish alphabet (including ñ) and show messages in Spanish.

New features included 128 KB RAM, three-channel audio via the AY-3-8912 chip, MIDI compatibility, an RS-232 serial port, an RGB monitor port, 32 KB of ROM including an improved BASIC editor and an external keypad.

The machine was simultaneously presented for the first time and launched in September 1985 at the SIMO '85 trade show in Spain, with a price of 44,250 pesetas. Because of the large amount of unsold Spectrum+ models, Sinclair decided not to start selling in the UK until January 1986 at a price of £179.95. No external keypad was available for the UK release, although the ROM routines to utilise it and the port itself, which was hastily renamed "AUX", remained

CPU Zilog Z80 A
SPEED 3.5469MHz
RAM 128kb
ROM 32kb (16k 48k Basic + 16k 128k Basic)
TEXT MODES  32 x 24
GRAPHIC MODES  256 x 192
COLORS  8 with two tones each (normal and bright)
SOUND 3 channels, 7 octaves (Yamaha AY-3-8912)
SIZE / WEIGHT  320 x 150 x 45 mm

Photograph © Bill Bertram 2006

Our model was kindly donated by Paula from Norfolk

Manufacturer: Sinclair
Date: January 1986



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Sinclair ZX Spectrum 128 Manuals:

Item Manufacturer Date
A Course in BASIC Programming - ZX80 Operating Manual Science of Cambridge 1980
Disk Interface Manual (Technology Research) Technology Research 1984
Sinclair - ZX Spectrum Servicing Manual Sinclair Jan 1984
Sinclair ZX Spectrum +2 Manual Sinclair 1986
Spectral Manual (East German ZX Spectrum Clone) Hübner Elektronik 1988

Sinclair ZX Spectrum 128 Articles:

Item Manufacturer Date
Prism VTX5000 Prism Unknown
Sureshot Spectrum Joystick Interface Sureshot Unknown
Competition Pro 5000 Joystick Coin Controls Ltd. Unknown
Sinclair ZX Interface 2 Sinclair Unknown
Home Made Load-Save Box for Sinclair ZX Spectrum Home Made Unknown
Home Made ZX Spectrum Speech Synthesizer Home Made Unknown
ZX Interface 1 Sinclair Unknown
Dk'tronics ZX Spectrum Light Pen- Dk'Tronics Unknown
Indescomp Parallel/Serial Interface indescomp Unknown
Data-Skip VIDEOFACE Digitiser Data-Skip Unknown
DivMMC EnJOY! mint Unknown
Power Play Joystick Interface Power Play Unknown
AGF Protocol Game Controller Interface AGF Unknown
ZX Spectrum Print 'n' Plotter Jotter Print 'n' Plotter products Unknown
Ram Electronics Music Machine Ram Electronics Unknown
Home Made ZX Spectrum Speech Synthesizer Home Made Unknown
Home Made Load-Save Box for Sinclair ZX Spectrum Home Made Unknown
Add-On Electronics Sound Module Adonic Electronics Ltd Unknown
Lo-Profile Professional Keyboard Unknown
MGT Plus D Interface MGT Unknown
Kempston Pro Joystick Interface Kempston Unknown
Sinclair ZX Printer Sinclair Unknown
Morsen Electronics Radioteletype Adapter Morsen Electronics Unknown
Sinclair Black Watch Sinclair Radionics 1975
Sinclair ZX Spectrum Test Cartridge Sinclair 1983
ZX Interface 1 for Sinclair Spectrum Sinclair 1983
Cheetah Sweet Talker Cheetah 1983
Abacus Controller Abacus Electronics 1983
Sinclair ZX Spectrum Test Cartridge Sinclair 1983
ZX Microdrive Sinclair 1983
Fuller Box Games Unit Fuller Micro 1983
Datel Inter Printer for the ZX Spectrum Kempston 1983
Rotronics Wafadrive Rotronics 1984
Currah Speech and Sound Currah 1984
Rotronics Wafadrive (2) Rotronics 1984
Protek JCB01 1200/75 Modem Protek 1984
SAGA 1 - Emperor Keyboard for Sinclair ZX Spectrum Emperer 1984
Sinclair ZX Spectrum On/Off Power Switch Sinclair 1985
Rotronics Commodore Wafadrive Adaptor Rotronics 1985
Sinclair ZX Spectrum On/Off Power Switch Sinclair 1985
Protek Switchable Joystick Interface Protek Computing Ltd 1985
Cheetah 125+ Joystick Cheetah Marketing Ltd 1986
Multiface One Romantic Robot 1986

Other Systems Related To Sinclair ZX Spectrum 128:

Item Manufacturer Date
Prototype of MK14 Sinclair 1977
Science of Cambridge MK14 + Original Keyboard Sinclair 1977
Science of Cambridge MK14 - Original Kit Sinclair 1977
Science of Cambridge MK14 + Memory Expansion in wooden case Sinclair 1977
Science of Cambridge MK14 Sinclair 1977
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 - Signed by Rick Dickinson Sinclair 5th March 1981
Sinclair ZX81 with Custom Case/Keyboard Sinclair 5th March 1981
Sinclair ZX81 Issue One 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 QL + SchÖn Keyboard 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 QL Sinclair 1984
Sinclair ZX Spectrum+ Sinclair 1st June 1984
Sinclair ZX Spectrum +2 Sinclair 1986
Sinclair ZX Spectrum 128 Sinclair 1st June 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 CH2584. Please quote this reference ID in any communication with the Centre for Computing History.

 

Sinclair ZX Spectrum 128

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