You can try the ZX80 / ZX81 forums - http://www.rwapservices.co.uk/ZX80_ZX81/forums/
The Sinclair ZX80, ZX81, Spectrum and QL personal computers.
Graham Charlton has written: 'The Turing criterion' -- subject(s): Programming, Sinclair ZX81 (Computer)
ZX80 - 1980 ZX81 - 1981 ZX Spectrum - 1982
Trevor Toms has written: 'The ZX81 pocket book' -- subject(s): Computer games, Programming, Sinclair ZX81 (Computer) 'SORT' -- subject(s): Data processing, Management, Microcomputers, Retail trade, Small business 'Das Spectrum-Buch'
Richard Francis Altwasser has written: 'The Cambridge collection' -- subject(s): Sinclair ZX81 (Computer), Programming
The ZX81 sold in the United Kingdom for 69.95 pounds (built) or 49.95 pounds (as a kit) with 1KB of RAM. Another 16KB of RAM cost 50 Pounds. The equivilent machine in the US sold a year later for $100. It was amazing what programmers could fit into 16 KB. Unlike the bloatware of today they wrote very tight code.
Sir Clive Sinclair. His first attempt at a mass produced computer was the SInclair ZX80. This was followed by the Sinclair ZX81, and subsequently the ZX Spectrum.
Edward Page has written: '37 Timex 1000/Sinclair ZX-81 programs for home, school, office' -- subject(s): BASIC (Computer program language), Programming, Sinclair ZX81 (Computer), Timex 1000 (Computer) 'Practical TIMEX/Sinclair computer programs for beginners' -- subject(s): BASIC (Computer program language), Programming, Sinclair ZX81 (Computer), Timex 1000 (Computer)
Zap Attack was an early computer game (1984) on the Sinclair ZX81. Zap Attack is also a generic term for programmed attack sequences as parts of edited computer games.
Try going here: http://www.zx81stuff.org.uk/zx81/emulate.php?tzx=0%2F3DMonsterMaze(NGS).tzx.zip%400&title=3D+Monster+Maze However, you might need to install Java in order to play it. This online version is the actual version that is played on the ZX81 computer. But to be honest, I don't think this version is illegal to play and getting into a game is confusing, especially if you are trying to figure out what the keys do if you are using a plain keyboard. But the game when load on its own when starting up. There is also a pause feature if you click on the screen or click outside of the game. I hope this answer will help you.
Ian Davies has written: '100 Ideas for Teaching Citizenship (Continuum One Hundreds)' 'Teaching the Holocaust' '44 dynamic ZX-81 games and recreations' -- subject(s): BASIC (Computer program language), Computer games, Computer programs, Programming, Sinclair ZX81 (Computer)