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title, categories, types, origins, years, cpus, params
title categories types origins years cpus params
Sinclair ZX SPECTRUM 128
Computers
Home Computer
United Kingdom
1985
Zilog Z80 A
name image company company_name specs tabs photos hardware screenshots emulators links docs comments related oc_id source
ZX SPECTRUM 128 /media/museum/photos/sinclair_spectrum128_1.jpg /companies/sinclair Sinclair
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NAME ZX SPECTRUM 128
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MANUFACTURER Sinclair
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TYPE Home Computer
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ORIGIN United Kingdom
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YEAR 1985
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END OF PRODUCTION 1986
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BUILT IN LANGUAGE Sinclair Basic 48k and Sinclair Basic 128k
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KEYBOARD Same as the Spectrum+
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CPU Zilog Z80 A
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SPEED 3.5469MHz
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RAM 128kb
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ROM 32kb (16k 48k Basic + 16k 128k Basic)
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TEXT MODES 32 x 24
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GRAPHIC MODES 256 x 192
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COLORS 8 with two tones each (normal and bright)
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SOUND 3 channels, 7 octaves (Yamaha AY-3-8912)
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SIZE / WEIGHT 320 x 150 x 45 mm
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I/O PORTS Expansion bus, Numeric Keypad, RS232 / Midi Out, Video RGB, Tape (1200 baud)
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POWER SUPPLY External PSU, 9v DC, 1.85A (centre polarity = -ve)
photos
hardware
software
emulators
links
docs
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ZX SPECTRUM 128 /media/museum/photos/sinclair_zxspectrum128_top1.jpg
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ZX SPECTRUM 128 Ian Gledhill /media/museum/photos/sinclair_zxspectrum128_left1.jpg
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ZX SPECTRUM 128 Thanks to Ian Gledhill for this picture /media/museum/photos/sinclair_zxspectrum128_right1.jpg
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BOX /media/museum/photos/sinclair_zxspectrum128_box1%5B1%5D.jpg
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BOX /media/museum/photos/sinclair_zxspectrum128_box2.jpg
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DISCOVERY SYSTEM The Discovery system uses the new Sony 3.5'' diskette to save in full safety the programs and data of the Spectrum or Spectrum+. The diskette has a capacity of 180 KB and a second drive can be installed. The commands of the operating system are similar to those of Sinclair Microdrives. The case includes a power supply and various Spectrum expansion connectors. In short, a lot of hardware qualities, but an incomprehensible defect: the data transfer speed is slower than Microdrives, whereas a disk drive is able to be ten times faster than a tape reader. Discovery did not meet success, certainly for this reason, but also because of its high price, not compatible with the Spectrum's young users' purse. /media/museum/hardware/sinclair_spectrum_fddiscovery_1.jpg
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INSIDE DISCOVERY **(1)** Metallic case.\ **(2)** Centronics parallel printer connector.\ **(3)** Spectrum expansion connector.\ **(4)** Discovery to Spectrum connector.\ **(5)** EPROM memory chip holding drive management routines and OS commands.\ **(6)** Sony 3.5'' disc drive. A double side, single density version.\ **(7)** A strange location for the power transformer, under the disk drive and not protected against magnetic fields.\ **(8)** This empty socket receives a 2 Kb. RAM chip when a second disc drive is installed.\ **(9)** 6821 Circuit, in charge of disc drive control.\ **(10)** Each disc drive uses an internal RAM area to avoid using Spectrum RAM.\ **(11)** Atari standard joystick connector. /media/museum/hardware/sinclair_spectrum_fddiscovery_ins.jpg
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INSIDE WAFADRIVE **(1)** The Wafadrive unit includes two specially designed cartridge drives.\ **(2)** Each cartridge drive has its own motor and electronic control system.\ **(3)** The Wafadrive offers three expansion ports. Unfortunately, they are not compatible with the Spectrum ones and need special cables.\ **(4)** Centronics parallel printer connector.\ **(5)** Spectrum expansion connector for additional peripherals.\ **(6)** 8 Kb. EPROM holding operating system and Basic drives commands.\ **(7)** The Wafadrive is connected to the Spectrum expansion port. It also uses the computer's power supply.\ **(8)** Power Leds. /media/museum/hardware/sinclair_spectrum_wafadrive_2.jpg
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WAFADRIVE CARTRIDGE /media/museum/hardware/sinclair_spectrum_wafadrive_3.jpg
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CHEETAH JOYSTICK INTERFACE Thanks to Peter James for the picture /media/museum/hardware/sinclair_spectrum_cheetahjoyinterf_1.jpg
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KEMPSTON JOYSTICK INTERFACE Peter says:\ I'm not sure if this was the first joystick interface for the Spectrum but it defined a standard that was never displaced. Most games carried the words 'Kempston joystick compatible' Says it all really! They later revised the interface to offer 2 joystick connectors Thanks to Peter James for the picture /media/museum/hardware/sinclair_spectrum_kempstonjoyinterf_1.jpg
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DK'TRONICS SPEECH SYNTHESIZER /media/museum/hardware/sinclair_zx-spectrum_dktronics-speech_synth_1.jpg
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MAGECO MONITOR It cost 75fr in january 85 (France). /media/museum/hardware/sinclair_spectrum_dessas.jpg
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VTR VOCAL SYNTHESIZER 470fr (France, january 85) /media/museum/hardware/sinclair_spectrum_vocal.jpg
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CURRAH SPEECH Vocal synthesizer Just type on the keys and the Spectrum "speaks" with two tones, high and low. There is also a sofware support. /media/museum/hardware/sinclair_spectrum_vocal2.jpg
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CHEETAH SPECDRUM About the Specdrum, Peter says:\ This was the most fun add-on I ever bought for the Spectrum. You had to connect it to a phono input on a stereo amp, load up the software and away you went. You could enter the rhythm in real time or step time and it had 8 sounds it could play at once. The sound was perfect and still sounds good today. They released some extra drum kit sounds to expand the Specdrum's sound library, Afro Kit and Electro Kit are the ones I remember and purchased. I don’t think any Spectrum should be without this Add-on, it rocks!! Price: About £30 around 85-86 Thanks to Peter James for the picture /media/museum/hardware/sinclair_spectrum_specdrum_1.jpg
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ALPHACOM 32 Alphacom 32 is the well-known and the cheaper printer for the Spectrum, offering exactly the same features as the ZX Printer : full Spectrum characters set, 32 char. / line and silver plated thermal paper. Alphacom 32 uses its own power supply. june 84 price : 181 -E- (France). /media/museum/hardware/sinclair_spectrum_alphacom.jpg
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FLOYD 40 Floyd 40, from the manufacturer Shiva Marketing, doesn't seem to be very reliable with its very thin plastic case and its wooden paper axis ! However Floyd features are better than Alphacom ones: use of white thermal paper more readable and less expensive, only one cable to connect it to the Spectrum (power and data) and better printing quality. Moreover, Floyd 40 has larger characters set and printing options : double height and width, text printing in the four directions and more advanced and accurate graphic abilities (5 x 7 dots head). On the other hand, the printing is rather slow and the print width doesn't exceed 8 cm. /media/museum/hardware/sinclair_spectrum_floyd40_1.jpg
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ZX-81 THERMAL PRINTER This is a small thermal printer (of very poor quality !). It can print all the graphical characters of the Spectrum and can print 9 lines of text per inch. It was possible to make a hard copy of the screen thanks to the "Copy" command. This tiny thermal printer can also be used with the ZX-Spectrum. /media/museum/hardware/sinclair_spectrum_zx81_printer.jpg
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ZX THERMAL PRINTER Box /media/museum/hardware/sinclair_zx81_zx-printer_box_1.jpg
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RGB OUT /media/museum/hardware/sinclair_zx-spectrum128_video-rgb_d.jpg
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ZX INTERFACE 1 This interface offers an RS232 connector, a Microdrive connector and a network socket to connect up to 64 Spectrums ! This marvel cost 895fr in june 84 (France). /media/museum/hardware/sinclair_spectrum_intrfc1.jpg
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MICRODRIVES Sinclair Microdrives for use with the ZX Interface 1. Up to 8 microdrives can be connected. Micro-tape Capacity: 80k\ Speed: 5k/s\ Average access time: 3,5s\ Integrated power supply (through computer)\ Micro-tape price: 79fr 940fr (June 84) /media/museum/hardware/sinclair_spectrum_microdrive.jpg
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INSIDE A MICRODRIVE **(1)** Tape driving roller.\ **(2)** Read/write magnetic head, basically the same as a standard tape recorder.\ **(3)** Read/write protection switch.\ **(4)** Cartridge housing.\ **(5)** Power led.\ **(6)** Extension connector allowing up to 8 microdrives to be serial connected. /media/museum/hardware/sinclair_spectrum_insidemdv_1.jpg
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INSIDE A MICRODRIVE CARTRIDGE The support used in the cartridge is a videotape of 2 mm in width, and 8 meters in length. The video support was chosen for its biggest mechanical resistance. In running mode, the full tape length is covered in about 7 seconds and the information is transferred at 6 Kb. per second (1.5 Kb./sec. for a standard cassette). The recording is made simultaneously on two parallel tracks with a density of 200 bytes per centimeter. The information is organized in sectors of 512 bytes. Any program can be stored or loaded in 15 sec. Maximum. Each cartridge can store up to 100 Kb, but only 85 - 90 are available for the user. /media/museum/hardware/sinclair_spectrum_insidecartmdv_1.jpg
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ZX INTERFACE 2 This interface offers 2 joystick plugs and 1 cartridge slot. It cost 351fr in june 84 (France). /media/museum/hardware/sinclair_spectrum_intrfc2.jpg
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CARTRIDGE Sinclair Cartridge for use with the ZX Interface 2. Very few cartridges were produced (less than 10). It cost 185fr in june 84 (France). /media/museum/hardware/sinclair_spectrum_cartridge.jpg
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NUMERIC KEYPAD This numenic keypad can be used with the Spectrum +2 and Spectrum 128. Thanks to **www.zonadepruebas.com** /media/museum/hardware/sinclair_spectrum128_keypad_2.jpg
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NUMERIC KEYPAD plugged into the Spectrum 128 Notice that the keypad is plugged into the front of the Spectrum 128. Thanks to [ZX-Spectrum 128 keypad's site](http://www.fruitcake.plus.com/) for this picture /media/museum/hardware/sinclair_spectrum128_keypad_1.jpg
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SPANISH SPECTRUM 128 Boot screen The Spanish version of the Spectrum 128 boots directly to the 128k Sinclair Basic. There is no "boot menu" as the UK version has. /media/museum/software/sinclair_spectrum128es_ss.gif
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UK SPECTRUM 128 Boot screen The UK version introduces a nice "boot-up menu" where you can choose the different operating modes of the Spectrum 128 :\ - TAPE LOADER to directly load a tape without typing any Basic instructions\ - 128 BASIC is the new version of the Sinclair Basic\ - CALCULATOR acts as a real calculator (the optional numeric keypad is useful here)\ - 48 BASIC is the old Spectrum Basic left here for compatibility\ - TAPE TESTER is a simple program to test the communication with the external tape-recorder (this option will disapear from the +2 models) /media/museum/software/sinclair_spectrum128_ss.gif
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DAN DARE III /media/museum/software/dandare3.gif
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DOUBLE DRAGON A bit messy... /media/museum/software/doubledragon.gif
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DUN DARACH The guys are walking so smoothly /media/museum/software/dundarch.gif
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ELITE The mythic space game ! The father of all other space-games such as Wing-Commander. /media/museum/software/elite.gif
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FANTASY WORLD DIZZY One of the many games based on the egg-man Dizzy. /media/museum/software/fantasy-world-dizzy.gif
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GAUNTLET Conversion of the classic arcade game /media/museum/software/gauntlet.gif
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GUNFRIGHT 3D isometric western game. A must-have ! /media/museum/software/gunfright.gif
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IKARI WARRIORS As good as Commando ! /media/museum/software/ikari-warriors.gif
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IK+ International Karate + 3 players fight /media/museum/software/ikplus.gif
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ALIEN 8 Excellent isometric game /media/museum/software/alien8.gif
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ANT ATTACK Avoid the giant ants and save the girl in this 3D maze /media/museum/software/antattack.gif
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ARC OF YESOD /media/museum/software/arcofyesod.gif
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ATIC ATAC /media/museum/software/aticatac.gif
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BACK TO SKOOL Skooldaze ? /media/museum/software/backtoskool.gif
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BOMBJACK Classic game ! /media/museum/software/bombjack.gif
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BRUCE LEE One of the best game ever /media/museum/software/brucelee.gif
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CHASE HQ /media/museum/software/chasehq.gif
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CHUCKIE EGG Who never played this ?? /media/museum/software/chuckie-egg.gif
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COMMANDO Excellent conversion /media/museum/software/commando.gif
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DAILEY'S THOMPSON DECATHLON The best olympic game on the Speccy /media/museum/software/dailey-thompson-decathlon.gif
title url platform text
EightyOne http://www.chuntey.com/eightyone/ Windows Excellent emulator emulating nearly all ZX computers (80, 81, Spectrums, Timex, etc.). As well as emulating the machines themselves, numerous addon cards are supported, including hi-res graphics, custom character sets, sound and colour cards.
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GLECK HTTP://GLECK.EMUUNLIM.COM Windows Spectrum emulator. Runs on Windows 95 and up, and requires DirectX. Includes a debugger, and emulates also some Southamerican clones
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RealSpectrum http://www.ramsoft.bbk.org/realspec.html Windows complete and innovative Spectrum emulator for DOS and Windows
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Spectaculator http://WWW.SPECTACULATOR.COM/ Windows Spectaculator emulates the 16K/48K/128/+2/+2A Spectrums and some additional hardware.
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SPIN http://www.worldofspectrum.org/emulators.html Windows Spectrum emulator running on any version of Windows from '95 onward up to and including XP
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Warajavo http://www.void.demon.nl/warajevo/index.html Windows an excellent bosnian emulator for PC compatibles by Zeljko Juric (DOS)
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Warajavo http://www.void.jump.org/warajevo/ Windows an excellent bosnian emulator for PC compatibles by Zeljko Juric (DOS)
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X128 http://www.void.demon.nl/x128/ Windows Spectrum 48 / 128 / +2 / +3 Emulator
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X128 http://www.void.jump.org/x128/ Windows Spectrum 48 / 128 / +2 / +3 Emulator
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Z80 - The PC Spectrum Emulator http://www.accessone.com/~mcoward/z80.zip Windows Perhaps the best emulator for PC compatibles
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ZX-32 http://www.geocities.com/SiliconValley/Bay/9932/ Windows Great Win32 Emulator. Very stable, very fast.
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MacSpectacle http://little-bat.de/zxsp/download/mac_spectacle/manual.html Apple One of the most powerful Spectrum emulator
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ZX Spectrum http://www.komkon.org/~stiles/emulation/zx/index.html Apple
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ZXSP http://little-bat.de/zxsp/download/zxsp_mac/zxsp_mac.html Apple Emulator for PowerMac
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Ian's ZX Spectrum page http://www.comlab.ox.ac.uk/oucl/users/ian.collier/Spectrum/ Unix / Linux the official page of xz80, the emulator for XWindows
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Ian's ZX Spectrum page http://www.comlab.ox.ac.uk/oucl/users/ian.collier/Spectrum/ Unix / Linux the official page of xz80, the emulator for XWindows
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xz80 http://www.comlab.ox.ac.uk/oucl/users/ian.collier/Spectrum/ Unix / Linux
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xzx http://www.mfltd.co.uk/~dnh/xzx/xzx.html Unix / Linux an other emulator for Linux computers
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xzx http://www.zx-spectrum.net/xzx/ Unix / Linux an other emulator for Linux computers
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ASp http://www.greew.freeserve.co.uk/ASp.html Amiga OS
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Spec128 http://members.tripod.com/~JoeKelleher/Spec128/ RISC OS Emulates a Spectrum 128 for the Acorn
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HOB Java Spectrum emulator http://www.twinbee.org/hob/ Other platform Fascinate yourself for hours with this portable Java Spectrum Emulator.
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Java On-Line Emulator http://www.zxspec.freeserve.co.uk/java.html Other platform Plays games on-line !
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PocketClive http://pocketclive.emuunlim.com/ Other platform Spectrum 48k and 128k emulator for PocketPC !
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QAOP http://wizard.ae.krakow.pl/~jb/qaop/ Other platform Qaop is a ZX Spectrum emulator Java applet
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Sinclair Spectrum Emulator 1.1 http://www.palmtop.nl/ce/hpc_spectrum.html Other platform Handheld PCs and Palm-size PCs running Windows CE 2.0 or higher
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TEZXAS http://tezxas.ticalc.org/ Other platform ZX Spectrum emulator for TI 89 and 92 calculators !
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ZX68 http://zx68.8k.com Other platform Emulator for various 68000 based machines. First version is released for PalmOS
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FUSE http://fuse-emulator.sourceforge.net/ Multiplatform Fuse (the Free Unix Spectrum Emulator) is a ZX Spectrum emulator for Unix and MacOS X
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SPEC http://WWW.METHEDRINE.DEMON.CO.UK/spec.html Multiplatform Spec is a Sinclair ZX Spectrum 48k emulator for the PC. There are two different versions, Spec (freeware for DOS) and SpecX (Shareware for Windows 95/98/NT4).
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CRASH, the on-line edition http://www.crashonline.org.uk/ Site dedicated to the old well-known magazine
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DOCUMENTATION http://www.madhippy.com/8-bit/index.php?machine=sinclair Classic 8-bit Computers / lot of on-line documentations for Sinclair computers. USEFUL !
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DOCUMENTATION http://www.worldofspectrum.org/documentation.html#manuals World of Spectrum's documentation page
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DOCUMENTATION http://www.void.jump.org/ZXSpectrum128Manual/ Spectrum 128 on-line manual
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Good Old Games http://speccy.altervista.org/ ZX games and screenshots
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Las Spectrum y TK en el Uruguay http://WWW.Z80.UY.TC The story of the ZX Spectrum line and TK line in Uruguay, South America
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Number Cruncher http://www.8bit-museum.de/ This german website has an excellent Sinclair section
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Planet Sinclair http://www.nvg.ntnu.no/sinclair/ THE site to visit ! Everything you need.
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Sinclair Nostalgia Products http://surf.to/zx Lot of speccy stuff here and long list of clones
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Sinclair ZX Hardware Website http://www.xs4all.nl/~echorod/zx/index.htm Features designs to build your own Sinclair computer
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Software Records on Vinyl http://www.kempa.com/blog/archives/000053.html These records contained computer programs as part of the audio.
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Speccy.com.ar http://www.speccy.com.ar/ Argentine blog dedicated to the Spectrum
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Speccyalista HTTP://WWW.SINCLAIR.HU Hungarian Sinclair page
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Spectrum 128 keypad http://www.fruitcake.plus.com/ A very complete site about this famous keypad !
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Spectrum Screenshot Heaven http://members.tripod.com/ssh_web/ Excellent ! Plenty of speccy screenshots here.
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Speecy.CZ http://www.speccy.cz/ Nice site with a lot of games, demos, maps, screenshots, cover arts, music, etc...
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Steve's Spectrum Page http://ireland.iol.ie/~sjones/ Steve collects speccy games and accept requests
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Tape Loader Home Page http://perso.club-internet.fr/jgibart/spectl/spectl.html Utility to transfer your zx tapes to the PC
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The Incomplete Spectrum ROM Assembly http://www.wearmouth.demon.co.uk/ Spectrum ROM assembly text file. Very useful if you want to create your version of the Spectrum Operating System
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The Ocean Experience http://www.theoceanexperience.cjb.net/ A look into one of the biggest games developers of the 80's and 90's
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The Tipshop http://www.the-tipshop.co.uk/ A central archive for all Spectrum and SAM games hints, tips, cheats, maps, hacks and pokes. Impressive!
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The World of ZX-Spectrum http://www.worldofspectrum.org/ This is it. The site you MUST visit first :-)
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Virtual TR-DOS HTTP://ZX.DA.RU Belarussian ZX-soft archive (in Russian)
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Your Sinclair, a celebration http://www.yoursinclair.co.uk/ Tribute to one of the best Spectrum dedicated magazine
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z00m's Speccy corner http://zoom.czweb.org/ DOCUMENTATION, PICTURES, emulators, AY CHIP
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ZX Download page http://zxfiles.hut2.ru/ The very best of new ZX Spectrum games both Europe and ex-USSR
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ZX Forever http://www.zx-f.ru/ Full with new Russian ZX Spectrum games (lots of them are in English language)
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ZX Spectrum Games after 1993 http://tarjan.uw.hu/zx_gamez_after_93_en.htm Nice article referencing ZX Spectrum games released after 1993!
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ZX Spectrum in the 21st Century http://tarjan.uw.hu/zxclones_en.htm Nice info about a lot of ZX Spectrum clones and hardware
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ZXSPECTICLE http://www.worldofspectrum.org/zxspecticle/ News, Reviews, Interviews and the A to Z top ten games
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Web Wiz CAPTCHA http://www.webwizcaptcha.com Sinclair computers
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ZX SPECTRUM BASIC PROGRAMMING http://www.1000bit.it/support/manuali/sinclair/zxspectrum/start.htm /media/museum/docs/couvs/sinclair_zx-specrtum_basic-programming.jpg [**ZX SPECTRUM BASIC PROGRAMMING**](http://www.1000bit.it/support/manuali/sinclair/zxspectrum/start.htm)written by Steven Vickers  compiled/archived by Chris Owen / Tiziano Garuti\  type of document : HTML\  source : [1000Bit](http://www.1000bit.net/)
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ZX SPECTRUM INTRODUCTORY MANUAL http://www.worldofspectrum.org/ZXSpectrumIntroduction/ /media/museum/docs/couvs/sinclair_zx_spectrum_introductory-manual.jpg [**ZX SPECTRUM INTRODUCTORY MANUAL**](http://www.worldofspectrum.org/ZXSpectrumIntroduction/)written by Steven Vickers and Robin Bradbeer  compiled/archived by Colin Woodcock\  type of document : HTML\  source : [www.worldofspectrum.org](http://www.worldofspectrum.org/faq/resources/documents.htm)
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ZX SPECTRUM SERVICE MANUAL http://members.lycos.co.uk/eightbitula/48kinfo.html /media/museum/docs/couvs/sinclair_zx-specrtum_service-manual.jpg [**ZX SPECTRUM SERVICE MANUAL**](http://members.lycos.co.uk/eightbitula/48kinfo.html)written by Sinclair Research Limited  type of document : HTML\  source : [The Lil Old Sinclair Computer Technical Information Repository](http://members.lycos.co.uk/eightbitula/)
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john (Australia) Tuesday 30th October 2018 Spectrum 128 was designed in the UK but first made in Spain by Investronica. Sinclair didn''t sell it in the UK until 1986 because of an agreement with Lasky''s to shift all the remaining rubber and plus models first. However you could get Spanish 128s (which included a external numeric keypad) at all the major retailers in the UK from about August 1985. They cost about 200 quid - about the same as a Commodore 64 at the time. The 128 is a 48K system, the 80Kb above ramtop could be used as a ramdrive in BASIC, or swapped in 16K at a time in MC.
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Clumsy Colin (United Kingdom) Tuesday 5th August 2014 Roger Jowett, what have you been smoking?
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Roger Jowett (Ulster) Thursday 28th February 2013 https://www.youtube.com/watch?v$zsjTpFR0oYQ please can anyone help lcd add hmpr bit 5$6 mode 3 interlaced with intra frame compression think gassman and naxtcross might be the only ones with a clue
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Krzysztof Wojdon Monday 11th April 2011 Spectrum 128K memory was not organized in two blocks. It was top 16K of the regular addressable 64K that was used to switch into additional 64K of memory.
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Chris Sunday 20th March 2011 Robert Holliday posted a quest for spectrum FPGA. Have you seen this? http://mikestirling.co.uk/2010/11/zx-spectrum-on-altera-de1-source-code/ Regards\ Chris
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Robert Holliday Tuesday 1st February 2011 Does anyone know of a single chip spectrum (ON FPGA) like the Altera DE0 board ?? or has anyone made a new speccy running on the eZ80. The eZ80 runs 50 times faster than a 4MHz Z80A !!!!!! It would be a great project.... or even make a Sam Coupe running on an eZ80 !!
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Davey Tuesday 1st February 2011 Hi. Does anyone know of a tape database for speccy software that I can download for free ?? I''m looking for audio files not digital ones, as I''m meaning to put the software onto floppy 3" disks !! If anyone knows please post a message !!
/museum/czerweny-cz-2000
/museum/czerweny-spectrum
/museum/czerweny-spectrum-plus
/museum/elwro-800-junior
/museum/sinclair-zx-spectrum
/museum/sinclair-zx-spectrum-2
/museum/sinclair-zx-spectrum-3
/museum/sinclair-zx-spectrum-480
35
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https://web.archive.org/web/20230605224029/http://www.old-computers.com/museum/computer.asp?c=35 2023-06-05

The Spectrum 128 (code named Derby) is the successor of the Spectrum +. It was made just before Amstrad bought the right to use the Sinclair name in computer products. So it can be regarded as the last "real Sinclair Spectrum".

The 128 is the first real evolution of the old Spectrum. It has a lot of new features: 128kb RAM, a new sound chip (Yamaha AY-3-8912), RS232/Midi and video RGB outputs.

The Spectrum displays a menu when it is switched on:
- "Tape Loader" to run programs on tape,
- "Calculator" to enter operations without typing PRINT before,
- "Tape Tester" to test the input level of the tape recorder,
- "BASIC 48" and "BASIC 128".

The Spectrum 128 can use two versions of BASIC: BASIC 48 is just for the compatibility with the previous models and can't use the new features.
The Basic 128 mode has a full screen editor and the user can enter the Basic statements letter by letter instead of pressing key combinations. It has new keywords to use the extended memory as a RAM disk (unless bank-switching routines are utilized) and to handle the new sound chip and the MIDI out socket.

Because there were still large unsold stocks of Spectrum+ in the UK, the Spectrum 128 was first launched in Spain where the Speccy was already very popular. It was sold there with an external numeric keypad to connect the main unit. This "spanish model" doesn't boot on a "start menu" as the UK version does (thus spanish 128k models are slightly different than later UK models). But even after being introduced in UK it had a short market life and was replaced with the Spectrum +2.