Sinclair zx81

Sinclair zx81. That means, it can be built with all parts still readily available today. A ZX81 sikerének csak utódja, a színes képernyős Sinclair Spectrum és a nyomában kibontakozó olcsó számítógépek versenye vetett véget. CPU: Z80A. Mar 27, 2022 · The ZX81 has a clock oscillator made from a 6. It is one of those home computers very popular in the '80s and affordable (£49. ZX81 oli saatavilla myös Suomessa, joskin se jäi edullisuudestaan huolimatta Commodore VIC-20 :n A ZX81 olcsóságával és egyszerű kezelhetőségével tömegessé tette a számítógéphasználatot a fejlett országokban, de Magyarországon is. The follow up to the ZX80 Sir Clive Sinclair consolodated many chips into a ULA to further cost reduce the computer and help get it into our homes from under £50. Sinclair ZX 81 ime je za kućno računalo koje je razvila engleska tvrtka Sinclair Research i koje je pojavilo na tržištu Ujedinjenog Kraljevstva 1981. Background: In 1980 the British company Science of Cambridge (later renamed Sinclair Research) released the Sinclair ZX80 home computer. Mar 4, 2011 · While its successor, the Sinclair Spectrum, got the nation playing computer games, the ZX81 was the tipping point that turned the home computer from nerd hobby into something anyone could buy and use. Inspired by the public reaction to the ZX81, and annoyed at not winning the contract to design a computer for the British Broadcasting Corporation Mar 5, 2021 · It has been 40 years since the launch of Sinclair's ZX81, a device that welcomed countless Brits to the delights of home computing at the dawn of the 1980s. Much of this software has been developed over the past couple of years as a direct response to the renewed enthusiasm for the humble ZX81 expressed through our ZX80/ZX81 forums. 5 MHz signal to synchronize the video output and it also divides the May 27, 2023 · This book answers questions about using and programming the Timex Sinclair 1000/Sinclair ZX81 computer. The ZX81 has the same microprocessor and runs at the same speed as the ZX80, but it has a better BASIC sz81 is a Sinclair ZX80/ZX81 emulator very much based upon the work of Ian Collier's xz80 and Russell Marks's z81 but employing the highly portable SDL and including additional functionality and features for desktop computers and portable devices. Timex Sinclair 1016 16K RAM Module in Box. El Sinclair ZX81, presentat per Sinclair Research el 1981, va ser el microordinador de menor preu de l'època, es venia en la versió kit per 49,95 £, i muntat per 69,95 £. ZX81 Service and Assembly Manual. The ZX81 also became known for having many problems, The Explorer’s Guide to the ZX-81 and Timex Sinclair 1000. Welcome to a taste of early 1980s home computing. Rare variants like the US Timex Sinclair 1000 can be very valuable. Developer David Horne discussed 1K ZX Chess and published the full source code as a type-in program in a Mar 25, 2023 · All it had in the way of built-in expansion was a cassette interface, 1-bit read and write ports exposed as 3. Features. 95. Also known as the Timex-Sinclair TS1000, it was the first personal computer to sell for under $100. Complete in box (CIB) models in great condition fetch premium prices. The successor of the ZX81 is the ZX Spectrum even more Aug 29, 2023 · The ZX81+38 is a clone of the Sinclair ZX81 home computer that replaces the ULA found in the original with standard logic ICs. It’s these that in an impressive feat of hackery he managed Dec 7, 2016 · 30 Years Supporting the Sinclair ZX81. 95). In place of a dedicated monitor, the ZX81 was designed to output video to standard television Jul 5, 2016 · To top it off, Sinclair also splashed out on a black injection moulded case, although retained the membrane keyboard. The ULA, which is responsible for video output, uses the 6. Mar 5, 2017 · On March 5, 1981, Sinclair Research launched the ZX81 home computer in the U. Get the best deals for zx81 sinclair at eBay. Jan 13, 2024 · Sinclair ZX81 emulators. It works, but my LCD TV does a terrible job with SECAM standard so I decided to do composite mod and I am a bit puzzled by it the unit has the SECAM additional components, a zener in D9, a 1kohm resistor in R32 and a 2n2369 May 21, 2021 · The ZX81 was a hugely successful Z80-based home computer produced by Sinclair Research and manufactured in Scotland. 25 MHz with 1KB of RAM. Primary memory: RAM 2K, ROM 8K. It was the successor to Sinclair's ZX80 and the predecessor of the ZX Spectrum and was hugely Mar 21, 2022 · イギリス製小型パソコンシンクレアZX81、SINCLAIR ZX811981年イギリスで販売開始。翌1982年から三井物産は輸入販売を開始。1983年頃から大手書店での May 29, 2021 · May 28, 2021. La carcasa era negra, con un teclado de membrana. [3] It was the smallest implementation of chess on any computer at the time. Shop today! Sinclair ZX80. Development. Molempia myytiin rakennussarjana ja ZX81:tä myös valmiiksi koottuna hieman kallimpaan hintaan. It had 50 calculator-style keys (including a full-size space bar and two shift keys), 64K of RAM and circuitry to improve tape load/save. The sinclair ZX81 from 1981 is an iconic retro computer in the history of home computing. 1 KB (64 KB max. $7. 11633 Posts. This web site contains my own collection of ZX81 and TS1000 tapes, hardware and books that I have built up over the last ten years or so, almost entirely from buying items on eBay, along with a small number of kindly donated items. It was launched in 1981 and sold for £49. Download sinclair zx81 ROMs free and play on your devices windows pc , mac ,ios and android! - page 1 Mar 5, 2021 · The Sinclair ZX81, the first mass marketed computer in the UK, was launched 40 years ago today. The classic ZX81 games are all over the Internet, but check the colorized folder for games with Chroma 81 support. I ditched this expansion and built a 16k internal RAM that does WRX, and also an 8k in the 8-16k area that can do UDG. Thu May 30, 2024 10:02 pm. There is information about all the items, including inlay and instruction scans, screenshots The ZX81 character set is the character encoding used by the Sinclair Research ZX81 family of microcomputers including the Timex Sinclair 1000 and Timex Sinclair 1500. [Retro Shack’s] ZX81 died, and while he tried to figure out the fix, he decided to build a new one. Le ZX80 avait réduit le nombre de puces dans un ordinateur en état de marche d'environ 40 à 21. I have recently acquired a SECAM ZX81. It has been considered as one of the most influential computers ever made, and is also one of the best selling computers ever, with over five million units sold. This small unassuming machine to most people today, with a mere 1K of RAM, is quite possibly laughable 0 but this sleek Oct 22, 2017 · ZX81 overview and demo! The Sinclair ZX81 (known in the US as the Timex Sinclair 1000) was my first computer, and here I look back to its revolutionary hardw The Sinclair ZX Printer is a spark printer which was produced by Sinclair Research for its ZX81 home computer. Added a vertically oriented top case as per my suggestion below, I think this one would produce best print quality and also requires no support if printed with Cura's adaptive layers. by Fruitcake. com. The final testing bench for the ZX81 at Dundee Timex, 3 February 1982. 95 in kit form and £69. The ZX80 was Sinclair’s first computer sold in the United States. Successor. 2504 Posts. Sinclair teamed with Timex Corporation in Scotland for production. 50. Power and cable for two drives $69. I also describe this machine in a YouTube video) Arrgg Some would say the ZX81 has to be the most irritating "toy" micro anyone could own. Opening up the case. 16K RAM (Sinclair Place) - Gold-plated connectors and power LED About this Site. To mark the paper, one of the printer's two May 26, 2024 · Anything Sinclair ZX Basic related; history, development, tips - differences between BASIC on the ZX80 and ZX81. Other very popular computers were the Commodore 64 and the Apple II but were far more expensive (ZX81 was ten times cheaper than Apple II Plus). Author (s): Mike Lord. Försäljningsmässigt blev ZX81 en succé och i februari 1981 tillverkade Sinclair 40 000 exemplar i månaden men kunde ändå inte fylla efterfrågan (15 000 exemplar/månad gick på export till USA ). November 1982 seems to be the first ad for the Aerco controller. 2024-02-10: Rewrite, using only 2 sector slices instead of 3 シンクレア zx81 は、シンクレア・リサーチが開発し、スコットランドでタイメックスが生産したホームコンピューターである。 紹介 シンクレア ZX81 概要 Sinclair was the leader in low-cost personal computers for consumers. 00. Qui sono archiviate Feb 8, 2024 · 2024-02-09: Start converting pseudo code into ZX81 BASIC. Představen byl 5. The ZX81, Sinclair's third computer, sparked a popular mania for computing following its launch in 1981. Sep 18, 2022 · In 1982, the first floppy disk system for the ZX81 appeared. The ZX81 was a lower-chip-count successor to the ZX80 (a machine I would dearly love to add to my collection). The keyboard was an inexpensive membrane without moving keys, programs were stored on an audio cassette recorder, and the display was “any television set. Since it said "simple" I figured a 2n3904 would do the job. The first step was to open up the case. It had a Z80 at 3. Mar 4, 2011 · Tomorrow, 5 March 2011, marks the 30th anniversary of the arrival of the machine that did more to awaken ordinary Britons to the possibilities offered by home computing: the Sinclair ZX81. ”</p> Sinclair ZX81 Computer 16k RAM Block & Timex 1000 Software Tapes Vintage Tech. Timex (TMX) Portugal The Timex facility in Portugal designed and produced computers, disk drive systems and more. At 7″ x 9″, weighing less than a pound and priced at $199. Although it wasn't the first The Sinclair ZX81 was introduced in March of 1981 by British entrepreneur Clive Sinclair. Finished the code, but of course doesn't work. Commercial success and home computers ZX Spectrum (1982) In March 1981, Sinclair Computers was renamed Sinclair Research Ltd and the Sinclair ZX81 was launched. Clockwise from upper left: Box from memory module, ZX81 with RAM module attached on back, Sinclair printer (with two extra paper rolls behind), ZX81 Basic Programming manual, ZX81 assembly Jun 4, 2018 · Sinclair ZX81: The Sinclair ZX81 is a personal computer developed in Britain and released in 1981 that is known for introducing the personal computer into the mainstream. The ZX81 ROM was 8 KB in size (double that of the ZX80), and contained an updated BASIC interpreter complete with floating-point and trigonometric capability, plus new commands to communicate with the ZX Printer. The Sinclair ZX81 was my first home computer - my brother had one as a Christmas present in 1981, and I bought it off him the next year, so that he could upgrade to a ZX Spectrum. Cook) - Plans to expand 1K model to 16K or ZX81 with 16K to 32K for under $30. Date: 1982. Free delivery and returns on eBay Plus items for Plus members. A truly low cost computer. Hardware. 25 MHz with a mere 1KB of RAM (although many users purchased a 16KB external RAM pack). Both machines also featured 1KB of memory and required a UHF The Sinclair ZX81 was the third microcomputer built by Sinclair but it had limited functionality. Learn the basics of ZX81 programming with this online HTML version of Steven Vickers' classic book. 95, the first computer for under $100. Programs or data can be stored on compact cassette's by connecting them to an audio output of the ZX81 Jun 14, 2023 · June 14, 2023. 1365 Topics. Quantity produced: two million. It appeared on the market at the right time, though, and enjoyed much popularity. Last post Re: Mushroomman ZX81. ZX81 BASIC Manual. The ZX81 is designed to be a low-cost introduction to home computing for the general public. Sep 17, 2021 · Sinclair ZX81 (Note: Click on the image for a larger view. Pojavio se kao nasljednik prijašnjeg modela ZX 80. března 1981. Mar 25, 2023 · The Sinclair ZX81 has a single-core Z80 processor running at 3. Any discussions related to the creation of new hardware or software for the ZX80 or ZX81. Apr 24, 2024 · Timex licensed American versions of the ZX81 as the Sinclair 1000 and Sinclair 1500, and Acorn briefly attempted to market their computers in the U. In 2022 dollars it would be $1,346. Compared to its successors, it was very modest in specifications (via Wikipedia): The ZX81 has a base… Original documents written by Sinclair Research Ltd. Fits inside ZX81. 50, it was the smallest, lightest and least expensive home computer available at the time. It is notable for being one of the first computers available in the United Kingdom for less than a hundred pounds. com for all your PCB needs! 🛠 The sinclair ZX81 from 1981 is an iconic retro computer in the history of home computin Oct 8, 2020 · The ZX81 was somewhat rushed, and had reliability flaws, but it cost 30% less than its predecessor – naturally, it sold by the proverbial bucket load, and earned Sinclair Research a small The ZX81 was launched on 5th March 1981 by Clive Sinclair as the successor to the ZX80, with a larger memory and improved mathematical functions. De fet era la versió millorada del ZX80 comercialitzat l'any anterior. Discussions about Sinclair ZX80 and ZX81 Hardware. The ZX81 consists of a 3. Sinclair ZX81s were donated by Chris Witkowski, Jim Fare and Jim Horn. That's a total of $437 for a single-floppy setup. I was soon typing in listings from the computer Sinclair ZX81. $20. . 5 mm jacks on its side. The ZX Printer used special 4-inch (100 mm) wide black paper which was supplied coated with a thin layer of aluminium. Timex Sinclair 1500. While its successor, the Sinclair Spectrum, got the nation playing computer games, the ZX81 was the tipping point that turned the home computer from nerd Jul 8, 2019 · The ZX81 is a home computer produced by Sinclair Research and manufactured in Dundee, Scotland by Timex Corporation. It was created by Mahjongg, introduced on a forum dedicated to Sinclair computers, and document on the web with construction files available on Retro-Computing - Sinclair ZX81 Online Emulator Explore few programs created for the Sinclair ZX81. It was launched in July 1982, with a US sales price of US$99. The emulator covers all of the functionality of the ZX80 and ZX81, including accurate timing of the display update to support the high resolution graphics tricks some programs used. Opens in a new window or tab. Apr 23, 2012 · The Sinclair ZX81 was released 1981 in the UK and later in 1982 in a slightly modified form as the Timex Sinclair 1000 in the United States. Description. Esta foi a versão melhorada do ZX80 comercializado no ano anterior. Priset i Sverige låg runt 1 100 kronor men ZX81 såldes även som Buy Sinclair ZX81 Vintage Computers & Mainframes and get the best deals at the lowest prices on eBay! Great Savings & Free Delivery / Collection on many items ZX81. 5 MHz ceramic filter identified as X1 in the schematic below. 95 fully assembled (this equates to about £250 in today’s money). 95, where purchasers had to assemble The ZX81 was a pioneering low-cost 8-bit PC launched in 1981. S. The result of this was the Sinclair ZX81, sold at an even lower price than the ZX80 at just £49. It was available ready-built (£69. Arhitektura ZX 81 bila je slična Jan 8, 2024 · French ZX81 composite mod. Virtual keyboard with several adjustable properties 5 days ago · ZX81 (EightyOne) WIP¶ Background¶ 81-libretro is an work in progress port of the EightyOne (a. Date. Another update, corrected the lettering size on the top case. The goal of this section is to act as a digital museum, easily accessible to artists, educators, students or any curious person. 25" double density floppy disc drive $189. Complete ZX81 system. An article in the New York Times noted the hopeful impact of Acorn computers in American schools; see “Acorn Sinclair Instrument Ltd introduced the computer as the ZX80 in February 1980, as both a kit and ready-built. The ZX81 was a Z80-based home computer produced by Sinclair Research and manufactured in Scotland by Timex Corporation released on March 5, 1981, and had a retail price of $99. ) It came with just one kilobyte of memory, and was a ZX80. 25 MHz, dual-channel memory, a Ferranti GPU, and plenty of expansion possibilities from its black plastic case. Much of its popularity is attributed to its affordability, as its predecessor (the ZX80) was much more expensive. Addresses how to create moving graphics, interfacing Sinclair zx81. 5 MHz clock circuit is fed directly to the ULA (IC1 - SINCLAIR COMPUTER LOGIC) on pin 35. I had some of these lying around in my parts bins. 308 Topics. It was launched in the United Kingdom in March 1981 and could be bought by mail order in kit form or pre-assembled, the first inexpensive mass-market home 1K ZX Chess' s code takes up only 672 bytes in memory, [2] but implements chess rules except for castling, promotion, and en passant, including a computer opponent. The Kradle allowed users to copy the ROM to RAM and then turn the ROM off. retrogamingcollector. 10 July 2020 updated most parts to fix some geometry glitches and improve strength. With just 1K of built in RAM, and a 16K RAM pack expansion, I was set to go. Launched in June 1980, the ZX80 was notable for its size, weight and price. In 1980, British company Sinclair released their ZX80 computer for $199. At the heart of the the machine beats the mighty Z80 processor, similar to the Osborne 1, TRS-80 Model 1 and a few of my other units. Shop with Afterpay on eligible items. fr Sinclair ZX81 är en hemdator, en utveckling av ZX80, som lanserades 1981. The Timex Sinclair 1000 (or T/S 1000) was the first computer produced by Timex Sinclair, a joint venture between Timex Corporation and Sinclair Research. THE Sinclair Emulator) to libretro. The ZX81 is equiped with 1KB memory, the operating system is driven by a Basic variant called Sinclair Basic. Sir Clive Sinclair’s ZX81 was a phenomenal sales success as one of the cheapest machines available in the early 1980s, but even its most fervent admirers will admit that it Kradle (K-2 Electronics) - The Kradle was a keyboard and enclosure upgrade for the ZX-81 and TS 1000. The technical service manual for the ZX81, complete with self-assembly instructions. The ZX81 was sold in North America under the name "Timex 1000". La petite histoire du Sinclair ZX81. The main keyboard circuit is also almost identical to a ZX81s, with the addition of a Arduino Pro Micro enabling the ZX-Key to be used as a regular USB PC keyboard. 16K or 32K RAM Plans (T. MuseeInformatique. Yes, I used to have that expansion working in one of my ZX81:s. It ran a Z80 processor clocked at 3. 95 for an assembled computer. mistergamestoy (672) 100%. There are also many original games for the Zeddy, check Bob's Stuff for some high quality games. by RS232. com/R A system review of the Sinclair ZX81 (Timex Sinclair 1000 / TS1500) more View and Download Sinclair ZX81 user manual online. Circuit diagram for the composite video output. Word length: 8 bit. Designed as a low-cost introduction to home computing, the ZX81 was designed to be small, simple, and cheap. 16-32-48K expanda RAM (Dancer) - Fits inside case. -. Mar 8, 2021 · Dans la publicité du ZX81, Sinclair se vantait que les spécifications plus élevées et le prix inférieur étaient le résultat du design. Of course, building a circa-1980-something computer from new parts is a bit Dec 31, 2014 · Guida al Sinclair ZX81 ZX80 e nuova ROM, sui computer Sinclair ZX81, Sinclair ZX80 originale e Sinclair ZX80 nuovo modello con ROM da 8k. Sun Jun 02, 2024 11:54 pm. One year later, they released the new and improved ZX81. In November 1979, Science of Cambridge Ltd was renamed Sinclair Computers Ltd. Factors like original packaging, manuals, rarity impact price. $369. Last post Re: multi-statement in zx81 b…. The JtyOne emulator is a JavaScript port by Simon Holdsworth of Mike Wynne's original EightyOne emulator . It has no relationship with previously established ones like ASCII or EBCDIC, but it is related though not identical . 95, making it the cheapest home computer at the time; it was advertised as "the first Sinclair ZX81 MEMOTECH ZX81 Keyboard PLUG IN COMPLET IN BOX BOITE RARE 1981 USA. Pre-Owned. The Sinclair ZX81 is my first computer, in 1982 (kit). ZX81 desktop pdf manual download. 1,5 mil. Compared to the ZX80, the ZX81 was much cheaper, at only $99. Mar 7, 2019 · The keyboard layout is based around the 8x5 matrix format found on the Sinclair ZX81 and ZX Spectrums, which makes sense as that's what it's designed to be used with. or Best Offer. The circuit description didn't specify the exact type of NPN transistor. However See all articles from SQ Syntax Quarterly v1 n1 Tags May 11, 2021 · ZX81 schematic circuit diagram here (this has French video output circuitry, but that does not matter when fault finding the digital circuitry). The computer was developed with another technology company, Nine Tiles 3 days ago · Any discussions related to the creation of new hardware or software for the ZX80 or ZX81. El computador personal Sinclair ZX81, lanzado por Sinclair Research en 1981, fue el computador de menor precio de la época y se vendía en la versión de kit por 49,95 libras esterlinas, y por 69,95 montado. The machine was shipped in two versions: as a traditional self-assembly kit (right) and, more popularly, as a ready-assembled machine which only needed to be connected to a television and power supply before it could be used. QL. Jul 5, 2021 · The Sinclair ZX81 was one of the early machines produced by Sinclair, and was the replacement for the ZX80 in 1981 – technically they were almost identical, but whereas the ZX80 used discrete components the ZX81 used a Ferranti ULA (Uncommitted Logic Array), reducing the chip count from 21 to 4 and substantially reducing materials costs. 5 MHz Z80A CPU from Nippon Electric Company, an ASIC dubbed Sinclair Jul 19, 2011 · Featured on http://www. Jul 15, 2021 · 🛠 Check out PCBWay at https://pcbway. 95) or in kit form (£49. Sinclair ZX81, (ZX81, Timex Sinclair 1000) a low-cost home computer developed by Sinclair Research and manufactured in Scotland by Timex Corporation, launched in the UK in March 1981, and as slightly modified Timex Sinclair 1000 in the US in July 1982. RAMCS and ROMCS are the newly decoded signals required for the ram & rom chips, the old RAMCS and ROMCS are not used any more. It was launched in 1981, with a recommended retail price of £49. Este era la versión mejorada del ZX80, comercializado el año anterior. ZX80 ja ZX81 ovat brittiläisen sir Clive Sinclairin suunnittelemia hyvin edullisia mikrotietokoneita, jotka julkaistiin vuonna 1980 [2] ja 1981 [3]. 5 million units were sold. Některá data mohou pocházet z datové položky. Byl vybaven procesorem Z80, 1 kB RAM a jako zobrazovací zařízení používal běžný televizor. I made some parts works, but I forgot how slow. Publisher: Reston Publishing Company. 95 in kit). May 13, 2016 · The Sinclair ZX81 (or the Timex 1000 as it was sold in the USA), is in many ways, the father of the home micro computer scene. Timex brought the Timex Sinclair 1000, 1500 and 2068 to eager users in the early 1980s. ZX 80. Floppy Disc Interface $179. The output of the 6. Sep 5, 2016 · Sir Clive Sinclair’s ZX81 celebrated its 35th Anniversary in March 2016. Much more fun! JtyOne Online ZX81 Emulator. Jan 3, 2016 · Figure 2. 98. This app focuses on the Sinclair ZX81 experience and is loaded with example software. on the basis of the BBC Micro’s success in the UK as a tool for use in schools. K. The encoding uses one byte per character for 256 code points. ZX81. Testing string slicing, string logical operators. Nasljednik. 49 shipping. Pour en savoir plus : http://www. Bilo je to prvo računalo čija je cijena uopće bila ispod 100 USD . For its day, it was incredibly small and densely integrated; the mainboard has two 40-pin ICs (Z-80 and a custom Sinclair chip), one 28-pin ROM chip, and (usually) one 24-pin RAM chip. L'aparença definitiva de la màquina va ser obra del dissenyador industrial Rick Dickinson. ZX81 byl jedním z prvních levných domácích počítačů, následovník ZX80 a předchůdce Sinclair ZX Spectrum. Basic on the zx81 was, I need to get rid of the FOR loop. C $872. O computador pessoal Sinclair ZX81, lançado pela Sinclair Research em 1981, era o computador de menor preço da época e foi vendido na versão kit por 49,95 libras esterlinas e 69,95 montado. ZX Spectrum. by deadmeat73 » Mon Jan 08, 2024 10:50 am. The ZX81 was initially sold in the United States through a small Sinclair operation. W. The ZX Spectrum ( UK: / zɛd ɛks /) is an 8-bit home computer developed and marketed by Sinclair Research. (It was also known as the Timex-Sinclair TS1000 in the U. We have a great online selection at the lowest prices with Fast & Free shipping on many items! We have received authority from the relevant software authors to make the following Sinclair ZX81 software available for download. k. The Sinclair ZX80 is a home computer launched on 29 January 1980 [2] by Science of Cambridge Ltd. Released on 5 March 1981, the ZX81 was the successor to 1980's ZX80 and, like its predecessor, was based around a Z80 CPU. 5. a. Title. 691 Topics. Jun 12, 2015 · Sold as Timex 1000 in the US, the ZX81 was cheap and cheerful; for many programmers, their first rung on the ladder of comp more Get the best deals on Sinclair ZX81 Vintage Computers & Mainframes. Prices range widely from $20-$300+ depending on condition and inclusions. (later to be better known as Sinclair Research ). It was extremely popular due to its low cost and relative power, and as a result was well supported with software and peripherals by The ZX81 was well received and became a massive success, spawning a series of clones, both illegal and licensed by Timex, which was manufacturing the UK models for Sinclair at its Dundee plant. More than 1. The original manual in PDF format. 95 . It was available in kit form for £79. or In addition to the Sinclair and Timex/Sinclair RAM packs, many solutions were available, up to 64K RAM. vh af ni rz aq iz ze qg ec re