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ZX81 Virtual Community - Contains links, a scanned copy of the ZX81 manual as well as ZXTAPE, a DOS-based utility to transfer ZX81 software from a PC to a ZX81 or tape recorder, and to transfer ZX81 software from tape back to PC.
System Variables of the Sinclair ZX81 - Memory map of the RAM reserved by the system.
ZX-TEAM - An active German Sinclair ZX81 users' group. Site offers information about the Sinclair machines and the group's activities, including news of forthcoming events, nn English and German.
Steven's ZX81 Computer - Links and information from an enthusiast.
ZX81 Stuff - Collection of ZX81-related documentation plus hardware and software projects.
ZX81 Home Page - A ZX81 FAQ, emulator and software links.
Zebra Systems, Inc. - Timex-Sinclair ZX81 computer kits for sale.
Sinclair ZX-81 back from the dead - Tony Smith writes about the availability of ZX81 DIY kits.
ZX81 - Planet Sinclair - Information, photos and resources for the Sinclair ZX80, including a detailed account of its development extracted from Ian Adamson and Richard Kennedy's book "Sinclair and the Sunrise Technology".
The ZX97 by Wilf Rigter - A project to design and build an enhanced, low power discrete logic version of the ZX81.
Sinclair ZX81 Benchtest - Article from Personal Computer World by David Tebbutt.
Rodney Knaap: Build your own ZX81 - ZX81 hardware website featuring a project for building your own ZX81 with discrete components as well as Wilf Rigter's ZX97. In English, Dutch and German.
Sinclair ZX81 FAQ - Some common questions about the ZX81.
Obsolete Computer Museum's ZX-81 Page - Technical specifications and pictures of the Sinclair ZX81 with comments from other ZX81 owners.
ZX81 'Caverns' Game - PC Remake - Author of the original 1980's 'Caverns' game offers a PC remake for download. Includes game history and instructions.
ZX80 hardware page - How to build your own ZX80 and ZX81.
ZX81 Forever - Pictures, newsletters and programs made with the ZX81, a 16kb rampack and a Timex 2040 printer. Updated monthly.
Sinclair ZX81 Collection - Collection of original Sinclair ZX81 hardware, software and literature. Photos and description for each item.
ZX81 kit - UK based sales and support of ZX81 computers in kit form, also related peripherals and books.
ZX81Kit .Com - A European supplier of the Sinclair ZX81 computer in kit form. Also contains useful information and links, and other ZX81 hardware is available.
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