--- title: Czerweny CZ-1000 categories: - Computers types: - Home Computer origins: - Argentina years: - '1985' cpus: - Zilog Z80A params: name: CZ-1000 image: /media/museum/photos/czerweny_cz1000_1s.jpg company: /companies/czerweny company_name: Czerweny specs: - label: NAME value: CZ-1000 - label: MANUFACTURER value: Czerweny - label: TYPE value: Home Computer - label: ORIGIN value: Argentina - label: YEAR value: '1985' - label: BUILT IN LANGUAGE value: Sinclair Basic - label: KEYBOARD value: Touch-sensitive keyboard, 40 keys - label: CPU value: Zilog Z80A - label: SPEED value: 3.5 MHz - label: RAM value: 2 KB - label: ROM value: 8 KB - label: TEXT MODES value: 32 x 24 (but 2 lines are reserved for system messages and commands) - label: GRAPHIC MODES value: 64 x 44 - label: COLORS value: Black and white - label: SOUND value: None - label: SIZE / WEIGHT value: 167 x 175 x 40 mm / 350gr - label: I/O PORTS value: Z80 Bus, tape, video - label: POWER SUPPLY value: External 9V - 600 mA AC adaptor - label: PRICE value: $80 ($79.90 'Austral' in Argentina) tabs: - photos - hardware - emulators - links - docs photos: - title: CZ-1000 subtitle: '' text: Thanks to Nestor Zangoni for this picture image: /media/museum/photos/czerweny_cz1000_1.jpg - title: MANUAL COVER subtitle: '' text: Thanks to **Mario Villar** image: /media/museum/photos/czerweny_cz1000_manualcover_1.jpg - title: BOX subtitle: '' text: Thanks to Nestor Zangoni for this picture image: /media/museum/photos/czerweny_cz1000_box.jpg hardware: - title: 64 KB subtitle: from Suntroncis text: Suntronics T/S 1000 & ZX81 64K Memory Pack (Male Socket on Back, Female Socket on Front). image: /media/museum/hardware/timex_1000-suntronics-64k_1.jpg - title: TIMEX SINCLAIR 1016 subtitle: 16k RAM extension text: '' image: /media/museum/hardware/timex_sinclair-1000_16kram-1016.jpg emulators: - title: EightyOne url: http://www.chuntey.com/eightyone/ platform: Windows text: 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. - title: VB81 url: http://freestuff.grok.co.uk/vb81/ platform: Windows text: Sinclair ZX81 Emulator (with Visual Basic sources). Excellent emulator - title: X-Tender url: http://www.delhez.demon.nl/ platform: Windows text: The best ZX emulator for PC compatibles - title: ZX 81 Homepage url: http://www.maxon.de/homes/r_kurz/ platform: Windows text: '' - title: ZX81 url: http://www.w-4.de/~kurz/ platform: Apple text: '' - title: XZ81 url: http://www.zx81.nl/ platform: Unix / Linux text: And other ZX-81 emulators there... - title: ZX-81 Emulator 2.1 url: http://www.hh.schule.de/hhs/mjaap/ftp/zx81_v21.zip platform: Atari text: '' - title: Java ZX81 Emulator url: http://home.clara.net/rsergeant/ platform: Other platform text: Java emulator - title: Timex/Sinclair 1000 Emulator (Java) url: http://www.vavasour.ca/jeff/trs80.html#ts1000 platform: Other platform text: With this JAVA emulator, you'll be able to run a Timex/Sinclair 1000 in your browser window - title: zx81emu url: http://www.tlienhard.com/ap800.shtml platform: Other platform text: ZX-81 Emulator for the SonyEricsson P800 Smart Phone - title: MESS url: http://www.mess.org platform: Multiplatform text: MESS emulates the ZX-81, Lambda 8300, Power 3000 and other clones ! links: - title: Achromic's ZX81 Site url: http://zx81.achromic.co.uk/ text: A small, ZX81 fan site. With games and links to some emulators - title: DOCUMENTATION url: http://www.8bit.ht.st/ text: The Lil Old Sinclair Computer Technical Information Repository - title: DOCUMENTATION url: http://web.ukonline.co.uk/sinclair.zx81/ text: ZX-81 on-line manual. Great work ! - title: Jame's Sinclair ZX-81 Page url: http://james.istop.com/zx81/ text: Some technical infos and links - title: Planet Sinclair url: http://www.nvg.ntnu.no/sinclair/computers/zx81/zx81.htm text: Planet Sinclair has very interesting information on the ZX-81 - title: Sinclair ZX Hardware Website url: http://www.xs4all.nl/~echorod/zx/index.htm text: Features designs to build your own Sinclair computer - title: The ZX81 Hardware and Software Collection url: http://zx81.atspace.com/ text: Online museum for ZX81 hardware, software and literature - title: TS1000.US url: http://www.ts1000.us/ text: Documentation, software, hardware tips and more - title: Zebra Systems, Inc. url: http://www.zebrasystems.com/zebrasystems/zx81/index.html text: Website where you can buy Timex/Sinclair products including ZX-81 kits ! - title: ZX81 Collection url: http://www.zx81stuff.org.uk/ text: Online collection of ZX81 tapes, books and hardware - title: ZX-81 forum url: http://zx81.tlienhard.com/ text: A new ZX-81 forum. cool. - title: ZX81 Home Page url: http://www.honneamise.u-net.com/zx81/ text: FAQ and ZX81 Charts. - title: ZX-81 The Archive url: http://www.imarshall.karoo.net/zx81/zx81technical.htm text: Lot of info here - title: ZX-81 webring url: http://www.zx81.de/webring/index.htm text: Very useful to explore other ZX-81 related sites - title: ZX-Team Homepage url: http://www.zx81.de/ text: Quite a reference for the ZX-80, ZX-81, TS1000-1500, PC8300, Lambda and Jupiter Ace ! - title: ZX-TEAM-homepage & ZX-81 Web-Ring url: http://www.zx81.de/ text: Logically useful - title: Web Wiz CAPTCHA url: http://www.webwizcaptcha.com text: Sinclair computers docs: - title: SINCLAIR ZX-81 BASIC PROGRAMMING url: ftp://ftp.worldofspectrum.org/pub/sinclair/books/ZX81BASICProgramming.pdf cover: /media/museum/docs/couvs/sinclair_zx81_basic-programming.jpg text: |- [**SINCLAIR ZX-81 BASIC PROGRAMMING**](ftp://ftp.worldofspectrum.org/pub/sinclair/books/ZX81BASICProgramming.pdf)written by Sinclair Research Limited / Steven Vickers  compiled/archived by Robin Stuart\  type of document : PDF\  size : 5,2 MB\  source : [www.worldofspectrum.org](http://www.worldofspectrum.org/) **... READ THE ONLINE VERSION BY CLICKING BELOW :** - title: TIMEX SINCLAIR 1000 - USER MANUAL url: http://www.ts1000.us/usermanuals.htm cover: /media/museum/docs/couvs/timex-sinclair_1000_user-manual.jpg text: |- [**TIMEX SINCLAIR 1000 - USER MANUAL**](http://www.ts1000.us/usermanuals.htm)written by Timex / Sinclair / Steven Vickers  compiled/archived by Bill Hicks\  type of document : PDF\  size : 3.5 MB\  source : [www.ts1000.us](http://www.ts1000.us/) **... READ THE ONLINE VERSION BY CLICKING BELOW :** - title: THE COMPLETE TIMEX TS1000 & SINCLAIR ZX81 ROM DISASSEMBLY url: null cover: /media/museum/docs/couvs/sinclair_zx81_rom-disasembly.jpg text: |- **THE COMPLETE TIMEX TS1000 & SINCLAIR ZX81 ROM DISASSEMBLY**\ written by Dr. Ian Logan & Dr. Frank O'Hara  compiled/archived by Bill Hicks\  type of document : PDF\  size : 5 MB\  source : [www.ts1000.us](http://www.ts1000.us/) **... READ THE ONLINE VERSION BY CLICKING BELOW :** - title: TIMEX SINCLAIR 2020 COMPUTER PROGRAM RECORDER url: null cover: /media/museum/docs/couvs/ts2020_tape-recorder_manual.jpg text: |- **TIMEX SINCLAIR 2020 COMPUTER PROGRAM RECORDER**\ written by Timex Computer Corporation  compiled/archived by Bill Hicks / www.ts1000.us\  type of document : Online reader **... READ THE ONLINE VERSION BY CLICKING BELOW :** comments: - author: Diego Sapena Pastor (Argentina) date: Monday 14th February 2011 text: As quoted by Marcelo, you could attach 16kb of extra RAM, but the price you had to pay for it (apart from the money, ''cause it was pretty expensive) was an increased reset time and a desperating slow response time when typing BASIC programs. Other drawbacks were it''s slow transfer rate cassette interface, it''s alarming high working temperature and the fact that many IC''s of the previous ZX80 were replaced by the Ferranti''s ULA (cost-saving idea) yielding the computer useless and repairless if you had it wrong, unless, of course, you could "cannibalizate" another one! Nevertheless, it was for us at that time, an adorable tiny self-contained computer with which we learnt BASIC and Z80 code in an inexpensive way! - author: Marcelo O. Garcia (Hearth) date: Monday 25th September 2006 text: I owned in the 80's (and still do) a CZ-1000, which is exactly the same as you show in your record, and had 2 Kb of RAM memory. I would add that at that at that time it was also possible to buy a RAM memory expansor, which connected to the CZ-1000 from behind. It featured 16 Kb of memory, which was "a lot" for that that time standards. related: - /museum/czerweny-cz-1000-plus - /museum/lambda-electronics-ltd-pc-8300 - /museum/microace - /museum/sinclair-zx-80 - /museum/sinclair-zx-81 - /museum/timex-sinclair-1000 - /museum/tonel-pc oc_id: 925 source: url: https://web.archive.org/web/20230604045301/http://www.old-computers.com/museum/computer.asp?c=925 date: '2023-06-04' --- TADEO CZERWENY "CZ" is a an electromechanical company, which was founded by Tadeo Czerweny in September 1958. It is located in Parana, Entre Rios province, in Argentina. The company made transformers, electric motors, etc. In the 80´s Czerweny marketed the Timex Sinclair´s models, under its own name. The CZ-1000 is thus a rebadged [Timex Sinclair 1000](/museum/timex-sinclair-1000/), which is itself a [Sinclair ZX-81](/museum/sinclair-zx-81/) with 2 KB RAM. In Argentina Czerweny models competed with Brazilians TK 83, 85, 90x and genuine Sinclair machines, but CZ sold more machines than them. --- **Marcelo Garcia** comments:\ In the 80's in Argentina it was possible to find a memory expansion module (16 KB), which was simply a box with extra memory chips which plugged into the back of the Czerweny CZ 1000
We need more info about this computer ! If you designed, used, or have more info about this system, please send us pictures or anything you might find useful.