For this to work, a special set of ZX80 and ZX81 modified ROM images need to be present inside the c:/tbblue/ folder. 15 Retro computing emulators that run online! Relive the early days of computing in your browser (but do remember to pause to eat and sleep). Due to a bug in the emulator, you will have to set Player 2's controller type. . Handles compressed formats zip, tar, rar, gz through external utilities. o and . Also, are there any ZX81 emulator file formats which are equivalent. There are also many original games for the Zeddy, check Bob's Stuff for some high quality. Need a Vsync or other 50/60 Hz time reference. This way, you can load games for the ZX Spectrum micro and a few. TZX files, and vice-versa. p files. I decided to use a 5-way tactile navigation switch on the left and a large fire button on the right. Designed as a low-cost introduction to home computing, the ZX81 was designed to be small, simple, and cheap. ZEsarUX also includes a folder,. Use on Other Web Sites. Create an account or sign in to download this. VOC, . Mainframe Terminal Emulators – They are used for linking the Terminal to your Desktop Terminal (Screen). Both machines also featured 1KB of memory and required a UHF. ZX80 / ZX81 emulator for Javascript enabled Web browsers. 95 USD ($302 in 2021). 0. Version 1. Disassembler for Zilog and/or Intel/TDL nmemonics Instruction, I/O and Data Breakpoinits, Single Step, Trace, IO intercept. The ZX81 was the first computer I ever encountered - my uncle had built one from a kit and showed it to me when I was seven. A tribute repository for the Sinclair ZX81 homecomputer. by Fruitcake » Mon Dec 17, 2018 2:11 pm. Quiltrex • 6 May • The Royal Game Of UR [70] • 1 May • Ataque Cibernético • Ms. You can learn about the emulators at zx81-javascript-emulator. Virtual keyboard with several adjustable properties; Control bar with icons for regularly. 1; ZX-81 Colecovision emulator. ZX81 Emulators. SDL. About the various emualators avaiable, and how to use them. ZEsarUX a cross platform ZX computer emulator with binaries are available for Windows, Debian, Raspian & Mac OS X. You can spend a lot of time on [Trucco’s] site. Followers 1. Runs any hi-res, semi-hi-res, mixedresolution, and low resolution ZX81 program. It uses Wren’s Amazing PicoDVI and CarlK’s Super no OS FAT FS for Pico libraries. Maps screen position to joystick position. The emulator can be used subject to the following license: /* JtyOne - A JavaScript ZX81 emulator. Why not round out the year be building your AZ15, the Raspberry Pi, Arduino and ZX81 keyboarded wonder of a mini computer. Many thanks for that I'll add it to my setup I'm building and see how it goes. JSSpeccy by Matt Westcott – ZX Spectrum 2008; js-zx8x by. 2068 Emulator Board. The other thing it tests is the SCROLL routine, which causes the display to bounce a bit when used on a real ZX81. This a computer presevation project for the Sinclair ZX81. 95. The developer has since then expanded it with extra features and functionality. 13 posts • Page 1 of 1. The JtyOne emulator is a JavaScript port by Simon Holdsworth of Mike Wynne's original EightyOne emulator. ini, either a ZX80 program can be loaded, or the computer type ZX80 can be selected from the Modify menu. Sinclair ZX81 FAQ. While this is normally quite fine when entering text with the membrane keyboard, moving to a mechanical keyboard makes this lack of speed somewhat more noticeable. P files. Especially up to version 6. zx81-javascript-emulator. Zeddynet Interface Available sporadically from and designed by the German ZX-Team, Zeddynet as the name implies connects a humble ZX81 to a TCP/IP network via. The ultra low-cost computer that was actually useless from the start. The Timex/Sinclair 1000, produced under license from Sinclair, was a modestly improved version of the Sinclair ZX81, with 2K RAM. EightyOne is an emulator for several home computers made by Sinclair Research (And their clones) in the 1980s. ZX81 The ZX81 is a computer developed by Sinclair. Use on Other Web Sites. Create a folder called ZX81SNAP in the root of flash card for legally owned files (in . More than 100 million people use GitHub to discover, fork, and contribute to over 420 million projects. DOWNLOAD OPTIONS download 1. 44 for 32 bit Windows (12:18 PM 12/14/20) The Z80 Emulator is a full featured emulator designed to run CPM, Intended for Hobbyists. A latency-hating emulator of 8- and 16-bit platforms: the Acorn Electron, Amstrad CPC, Apple II/II+/IIe and early Macintosh, Atari 2600 and ST, ColecoVision, Enterprise 64/128. Discussion forums for users of the Sinclair 8-bit range of computers - ZX80, ZX81, ZX Spectrum, Z88, clones. VB81 (ZX81 emulator) World of Spectrum / / (mirror) Your Sinclair Your Spectrum Unofficial Archive Z80 Instruction Timings ZX Design Info. Sinclair ZX-81. This is a Z80 Emulator applied to a ZX80 rom . v86 by Fabian Hemmer – PC/x86 (various systems) 2013. Also included are zx81get (a ZX81 tape reader), and saverom (a program to save the ROM from a ZX81). With only 1K RAM, monochrome video that dropped out. Use on Other Web Sites. The game was initially released by J. Abstract. Play web remake of 3D Monster Maze - Malcolm Evans & J. Excellent emulator: X-Tender: The best ZX emulator for PC compatibles: ZX 81 Homepage: ZX81: XZ81: And other ZX-81 emulators there. the ZX81 tape file format and/or ZX81 emulator . Name: ZX81 Emulator Version: 4. (Remember, it's still possible to play old DOS games on a Mac if you're so inclined. Of course, building a circa-1980-something computer from new parts is a bit. The 1351 had two modes of operation, an analogue mode and a digital. Only the keys required from the ZX81 keyboard are shown. This page was last edited on 24 March 2022, at 23:29. An emulator is available on the site to play the game online. Greye and programmed by Malcolm Evans and released in 1981 for the Sinclair ZX81 platform with the 16 KB memory expansion. While there are a number of ZX-81 emulators out there for DOS, as of this writing I only know of one that works under Linux: Z81, by Russell Marks, based on xz80. The successor of the ZX81 is the ZX. z81 - Sinclair ZX81 and ZX80 emulator. Timex Sinclair 1000. Thanks. Frogger was positively received as one of the greatest video games ever made and followed by several clones and sequels. 25MHz The clock frequency is gained from a high tolerance 6. This emulator can be installed from the experimental menu of the RetroPie-Setup script. As well as emulating the machines themselves, various add-on interfaces are supported, including storage devices, hi-res graphics, custom character sets, sound. Emulator: lr-81. If brought high the ZX81 and Keyboard are reset. It accurately emulates Spectrum 48k, 128k and Pentagon, and supports SNA/Z80/SZX snapshots, TAP/TZX/PZX tape files, TRD/SCL disk files and RZX replay files. Emulators. This system scrapes metadata for the “zx81” group and loads the zx81 set from the currently selected theme, if. It's a ZX Machines Emulator for UNIX based operating systems (and Windows), including all the Sinclair computers: Microdigital TK80, TK82, TK82C, TK83, TK85, TK90X (Portuguese and Spanish), TK95 (Portuguese and Spanish) ZEsarUX source code and binaries are distributed under GNU GPL license. Retro-Computing - Sinclair ZX81 Online Emulator Explore few programs created for the Sinclair ZX81. . Remy's ZX Spectrum Next tools: txt2bas, bas2txt, sprite editor, tilemaps, palette editor, audio effects and image and font toolsHopefully when Paul is back online and settled from his move he can tweak it for you. This was adapted from a Spectrum program, and is an interesting game in the "puzzle" genre. 81-libretro is an work in progress port of the EightyOne (a. K. com C64 Fun C64Games. ZX-Key: New Lite Version. About; Team; SourceForge Headquarters 225 Broadway Suite 1600 San Diego, CA 92101 +1 (858) 454-5900; Resources. It is available for Windows and has a user-friendly interface with many features. Any other options ? Thanks, Luis. Note: In order to use this emulator, you will need to obtain the program image files (in . 3D Monster Maze is a survival horror computer game developed from an idea by J. To launch ZEsarUX as a ZX81 machine by default, you can add the line --machine ZX81 in the config file /home/pi/. Online version of Elite for ZX Spectrum. Click on ZX80 for the emulator type and click OK. The classic ZX81 games are all over the Internet, but check the colorized. jspspemu by Carlos Ballesteros Velasco – PSP 2014. The ZX81 is a home computer that was produced by Sinclair Research. 95 in kit). Supports the Sinclair ZX81, ZX Spectrum, Commodore Vic 20, 64, Commodore 16/+4, Amstrad CPC and Dragon 32. Pin 3: Reset line. E. 0. PlayEmulator is a convenient way to play old games you used to own that got lost over time. . cas, . ZX Spectrum emulation powered by JSSpeccy JavaScript emulator. Description. p and . The ZX81 was designed as the low-cost successor to the ZX80, accessible to the general public. LinuxLinks takes a brief look at Sinclair ZX81 emulators for Linux. 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. by bkumanchik. Most things expected from an emulator. Super Mario Kart. If you need to convert your own cassettes, there is some software for Windows that will convert audio input (from a cassette player) into a . Local . 避妊薬としての利用のほか、生理不順を解消し生理痛を抑える効果もあるため、避妊薬としてだけでなく生理の悩みを解消する目的で、多くの女性が. Emulation mode, is for use with ZX81 emulator software and simply passes through key presses as expected by an emulator. The original ZX-Key has been available for some time now, and won't be going away anytime soon. Print view; Search. for PC (Windows) Name: Multimachine Emulator Version: 1. Matthew Westcott's JSSpeccy uses a Z80 core based on translating Fuse's core to Javascript. The . Seemingly not working in the GTK+. The ZX Spectrum is, by far, the most widely emulated of all Sinclair machines. ZXS (readonly), . 54 kB; Share More sharing options. 8+ with the UDG display option turned on), or, if you are lucky enough, a standard ZX81 with a 16K RAM pack which gets its address lines from the ROM - unfortunately, this is different to the changes required for the HRG. Available on sinclairzxworld. The program has originally started as a two-weeks hack for emulating the ZX81, but now grew to a decent six-months project. 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. 1: Java ZX81 Emulator: Java emulator: Timex/Sinclair 1000 Emulator (Java)Released in the year of their suffix, kit or Pre Built versions of the ZX80 retailed at £70/£100 and the ZX81 £50/£70 respectively, as a comparison my first Hardware purchase (a Commodore VIC-20) cost £225 in 1981 which I promptly traded for the far more capable Atari 400 at £350! I have also attached a Jupiter Ace Emulator from his. . The ZX80 can also be emulated. The new version is faster, but still machinecode still can’t run on full speed. My ZX81-emulator for the ZX Spectrum got an updated version in 2020 which is much quicker, has partly chromacharacters and can play games that use special technics on the screen. - professional emergency rescue arcade game (based on Activision's MSX version, original design by John Van Ryzin, ZX81 version by myself) Beamrider - professional restrictor matrix arcade game (based on Activision's MSX version, original design by Dave Rolfe, ZX81 version by myself); Magic Floor - a small search game. Still we're about to plug a ZX81 into a network, a few aesthetics issues and minor viewing discomforts are hardly of major issue compared to the achievements realised. e. Reviews There are no reviews yet. When you next run the emulator it will create a new ini file. 2 - ZX81 Emulators. Add this topic to your repo. The Z80 was, of course, used in popular home computers such as the Sinclair ZX81, ZX Spectrum and the Amstrad CPC. bin, . Development. The JtyOne emulator is a JavaScript port by Simon Holdsworth of Mike Wynne's original EightyOne emulator . (Input Only: applies when using the keyboard with the ZX-Key Interface Expansion). ZeaMouse V2, USB Mice for the ZX81 & Spectrum Revisited: Part 2. Sinclair ZX81. BoycottAdvance Online (BAO) [Gameboy Advance Emulator in Java] CottAGE (Cott Arcade Generic Emulator) [Multiple Arcade Emulator in Java] PlayScott (the Online Arcade JukeBox) [Multiple Arcade Music Emulator in Java] GPCott [GamePark 32 Emulator in Java] PotatoSMS [Master System/GameGear Emulator in. zip: ZX81 emulator - DOS: mtmw130b. Emulates Spectrum models: 16k, 48k, Inves Spectrum +, Spectrum 128k (English and Spanish), Spectrum. 39 - An open-source emulator for ZX home computers created by Sinclair Research Ltd, including ZX80 and ZX81 and other ZX. To load the 'cassette' this program is located on, press the following keys: j (which will appear as LOAD), shift-p shift -p (Which will appear as double quotes) and then ENTER/RETURN. EightyOne is an emulator for the range of ZX home computers made by Sinclair Research (and their clones) in the 1980s, primarily the ZX80 and ZX81 but also includes the ZX Spectrum models. 95 for an assembled computer. Internet Archive: Digital Library of Free & Borrowable Books, Movies, Music & Wayback Machine. For this there are two options, either connect directly into the heart of the machine replacing the existing membrane keyboard, or build an external expansion interface card for ZX81 and keyboard. Since the Adam is a Z80 system with free RAM in the right area I am able to load the ZXROM at 0h, my emulator code at 2000h and have 16k free memory. zip: ZX81 emulator - DOS: mtmw130b. Propeller Emulators - ZX81 possibilitiy. End Users/Desktop. Transfers actual ZX81 tape audio into . 37 Views . It was the first home computer available for under $100 and you got what you paid for. 95 USD ($302 in 2021). VB81. Physical joysticks supported through SDL2 or the Linux joystick API. Download EightyOne 1. The TS1000 was launched in July 1982 and sparked a massive surge of interest. com) INTRODUCTION. In addition, I used boolean logic, functions and other stuff. k. The dz80 disassembler by Mark Incley. Donkey Kong Country. JtyOne, Sinclair ZX81 Online Emulator, and zxsp. This emulator can handle the TZX file format and includes a Program Finder to download directly from WoS! [30/11/10] ZX4ALL beta 2 by Chui. EightyOne: A popular emulator that emulates not only the ZX81, but also the ZX Spectrum and ZX Spectrum Next. 3. 2 and decoder for the original Modifier keys: ZX Spectrum ZX Spectrum load routine. It's an emulator of sorts, but the way I understand it, it is more like a VM. Squash Trainer is my entry to the PUR-80 category of the BASIC 10 Liner Contest; this means the program is 10 lines long and each line is made up of 80 characters to the upmost. Arcade emulation powered by Emulatrix, libretro JavaScript emulator. The classic ZX81 games are all over the Internet, but check the colorized folder for games with Chroma 81 support. 8 and 0. This program is distributed in the hope. 2 RC1 is released. 1K ZX Chess ZX81 Collection entry with the original inlay scan and program listing. net. Connected to the Z80 reset lines and the Arduino Pro Micros on the keyboard PCB. ini file saved by the previous version, which is located in a hidden folder under your user account name. Tandy CoCo. 81 files. Also manuals and documentation for all of them can be found online, and there are sources of already finished emulators for the Zeddy on other platforms. 3D Monster Maze (19xx)(J. EightyOne is an emulator for the range of ZX home computers made by Sinclair Research (and their clones) in the 1980s, primarily the ZX80 and ZX81 but also includes the ZX Spectrum models. Some additional commands to inspect and call routines in the ZX81 and the Z80 processor environments. ZX81 Forever-Page of André Baune, with his incridibles programs in Basic. Emulators of computers (mostly 8-bit) and consoles in JavaScript / HTML5 online. online game added: 2010-12-26, by dj. Sinclair Spectrum. The emulator doesn't load individual . The emulator uses adapted versions of js-unzip and js-inflate to access TZX files within ZIP files. Z80 corrupted snapshot loading from ZXSP emulator with additional header of 31 byte size Added ZSF support for Timex TS2068, MK14, Chrome, Prism, Chloe, Sam Coupe Added path setting where to download files from the speccy and zx81 online browser Added disk image browsing from storage MMC/IDE menus Added PZX load support as. The 8K ROM version of the game was originally branded as "ZX81 Kong" but renamed as "ZX80 8K ROM Kong" to better reflect its intended target machine. ZEsarUX: A cross-platform emulator that supports the ZX81 and many other systems, including the ZX Spectrum and Amstrad CPC. Features include Z80, Z180, I8080 Instruction sets. This article is a stub. The classic ZX81 games are all over the Internet, but check the colorized folder for games with Chroma 81 [email protected] emulator uses adapted versions of js-unzip and js-inflate to access TZX files within ZIP files. I’m waiting for Apple to approve my next version with support for the Recreated ZX Spectrum keyboard. Reviews There are no reviews yet. Features. Timex 1000 / ZX81 Emulator for DOS: VB81: Sinclair ZX81 Emulator (with Visual Basic sources). Below are the recommended emulators for each platform. Sinclair zx81 emulator Pc#. R. It sold over 1. Thunor is the main contact ( sZ81 web-master/ source manager)-> SDL-Zx81 engine. Supports. ZX-81 Emulator 2. z81 is a Sinclair ZX81 (aka TS1000) emulator. Whoosh! Who would have believed this? Manic Miner for the good old ZX81? And it's great too! Eleven screens of hi-res graphics! One of the best games ever fo. I have a good chunk of it working, I get it up to the 'K" prompt but I am stuck with keyboard input. Implement esp8266-zx81 with how-to, Q&A, fixes, code snippets. Pin 4 - 8: Column lines on the ZX81 keyboard matrix. Download and extract ds81. HTML5 emulators. 5. A (ZX81) program binary can been uploaded through the serial port (xmodem) and keyboard emulation is a crude serial to ZX keyrow conversion. Track: Retrocomputing devroom; Room: D. P or . Emulator and emulator development specific topics. The introductory text can be fast-forwarded by holding the up arrow key. , 8080 2012. Sinclair. as to whether it’s possible to build a Sinclair ZX81 from all-new parts in 2022. The content is provided for educational purpose, not for entertainment purpose. With the basic idea of the keyboard at hand, I needed a way to connect it to a ZX81. Help us while reliving hours of fun playing those retro classics all emulated on your computer. Discussion forums for users of the Sinclair 8-bit range of computers - ZX80, ZX81, ZX Spectrum, Z88, clones. ZX81 WEB Ring-Informações sobre vários fans de ZX81 no mundo. There are effectively no limitations plaguing new tittles , these having the potential to provide complex experiences with a full usage of UDGs. The final piece to the ZX81 keyboard puzzle is to get the Raspberry Pi / AZ15 to boot like it's 1981, arriving straight at the Sinclair "K" prompt after being switched on. NanoWasp by Dave Churchill – MicroBee. K. ( W32 res)-> all win32 messages box. z80_303. NO$ZX81 . Commodore. by Rodrigo Rivas Costa – ZX Spectrum . Emulates ZonX and Quicksilva sound. Zed Ex is an excellent Sinclair ZX81 emulator for Android based devices. Giemme Posts: 85. Use the true-type (TTF) font on Windows 10, the FON one is provide to run on W95>XP. z81 is a Sinclair ZX81 (aka TS1000) emulator. Features Virtual keyboard with several adjustable properties JtyOne was based on Mike Wynne's EightyOne Emulator (written in C#) that was notable for being able to accurately emulate ZX81 games that offered pseudo high-res graphics like Forty Niner and Rocket Man from Software Farm. 2. What more can I say. . Nothing more, nothing less. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your. It uses svgalib. Regards Gianni Hi as promised here is my ZX81 emulator. ピルとは一般的に経口避妊薬と呼ばれていて、 予定外の妊娠を防ぐための薬 です。. Use on Other Web Sites. Cronosoft – Software house for publishing new and unreleased games for retro computers and consoles. In the five months following the TS1000’s launch, the company sold 550,000 machines. More than 100 million people use GitHub to discover, fork, and contribute to over 420 million projects. Game: Run — R, ENTER Left — 6 Right — 8 Shoot — 0 Links: → Info about ZX80 (en) → Немного о ZX80 (ru) June 14, 2023 by Jenny List 16 Comments. plus-circle Add Review. This page was last edited on 12 May 2022, at 23:57. DeSmuME is a Nintendo DS emulator KeePass. DOWNLOAD OPTIONS download 1. Add this topic to your repo. Since the ZX81 had a touch keyboard the feeling is similar. emulator amstrad-cpc apple2 atari2600 z80. Jacomme also known as Zx-81 (zx81. K. tap which you can then load into a Spectrum emulator such as Fuse or ZEsarUS. The ROMs are not included, so you'll have to obtain those. Mike Wynne's ZX81 emulator, EightyOne is also using Fuse's Z80 core. 354 Views . Announcing a big revamp of my site, including a new JavaScript ZX81 Emulator (based on EightyOne and FUSE's Z80 core). A snapshot file, also known as a save state, is a saved representation of the current state of the emulator, including the contents of memory, registers, and other emulator data. Game Boy Advance games and all other games are in high quality! Play all the Retro Games that you used to play back in the day, and with our recommendation engine. 1. It is also possible to run up a ZX81 emulator on variety of modern hardware. I don't know about the ZX81 (and similar) but do they really need ALL the Z80 ops to function ?Updates to older games is all well and good, but endowing a ZX81 with near ZX Spectrum like powers (minus to colours) the UDG for ZXpand stands to have major impacts on many a new games releases. a. . EightyOne currently emulates: Sinclair ZX Spectrum 16k/48k. The Sinclair ZX81 is presented in Swedish in the file zx81_beckman. A Rick Dickinson-designed case made for a more consumer-friendly computer, even if the pressure sensitive membrane of the keyboard was somewhat less easy to use. The emulator uses adapted versions of js-unzip and js-inflate to access TZX files within ZIP files. Sinclair ZX Spectrum TOSEC Set – The ultimate, most complete ZX Spectrum files set that have ever been. This app focuses on the Sinclair ZX81 experience and is loaded with example software. CTimex/Sinclair 1000. Emulator zx81 Emulator_ext p Identifier ZX-81_Tetris_19xx_Russel_Marks Scanner Internet Archive Python library 2. Talking about which of them (Sinclair. The ZX81 is a home computer released by Sinclair in 1981. Speccy is really simple to use and most of the time will configure itself to emulate the best Spectrum model for a given game archive. Surprisingly, this is a pretty complex routine on the ZX81 and a good test of how the overall emulator works and interprets the ZX81’s ROM. Play web remake of Don Priestley's classic ZX81 maze game Mazogs. With the basic idea of the keyboard at hand, I needed a way to connect it to a ZX81. Sinclair ZX Spectrum TOSEC Set – The ultimate, most complete ZX Spectrum files set that have ever been. Supported tape file formats are . Various online examples of HiRes code work perfectly within an emulator but causes severe video sync problems on a real ZX81 Mike Wynne is something of a giant in the. History. This is the Z80 Emulator Version 1. Emulator Online has all the retro games from Super Nintendo (SNES & NES), SEGA (Genesis & Mega Drive), Game Boy (GBA, GBC, GB), N64, Nintendo DS and Neo-Geo Games. " GitHub is where people build software. Let’s try out the emulator to see the difference. This system scrapes metadata for the “zx81” group and loads the zx81 set from the currently selected theme, if available. Instructions are also available during the introduction preamble which includes details on the scoring. lha. Support for up to 320 by 240 pixel display, i. 1; ZX-81 Colecovision emulator. Greye Software) Notes. which you can run within your browser - just click on the "Play" button next to the track to launch the JtyOne emulator (note: needs Javascript to be enabled in. JSSpeccy 3 a ZX Spectrum emulator in the browser. eNGE. I think the "Simple ZX81 emulator" is a little outdated now - EightyOne is the most accurate ZX81 emulator available for Windows (And probably any other system too)" :- Mike Wynne. vic20chrome by Matt Dawson – VIC-20 2009; SAE by Rupert Hausberger. I have been entertaining the thought of using a Teensy 3. * Translated from EightyOne - A Windows ZX80/81/clone emulator. Spectrum emulation when used with appropriate ROM. I was immediately hooked and my parents bought me one of my own a few months later. The emulator uses adapted versions of js-unzip and js-inflate to access TZX files within ZIP files. PSPZX81 is a port of XZ81, which is an emulator of the Sinclair ZX81 home computer running on Unix systems. It was designed to be a low-cost entry computer for the general public. WinZ80: A basic emulator for the. With more than 1. Also manuals and documentation for all of them can be found online, and there are sources of already finished emulators for the Zeddy on other platforms. The ZX Spectrum also has a Videopac/Odessey2 emulator coded in 2000. EightyOne emulates a number of ZX80, ZX81, clones, and other computers based on the same hardware: Sinclair ZX80.