Lenslok is a copy protection mechanism found in some computer games and other software on the Atari 8-bit computers, Commodore 64, ZX Spectrum, Sinclair QL, MSX and Amstrad CPC. It was created by John Frost, an inventor and electronics consultant, and marketed by ASAP Developments, a subsidiary of J Rothschild Holdings.[1] The first game to use it was Elite for the ZX Spectrum.[2][3][4]
^"Lenslok". Home Computing Weekly. No. 126. Argus Specialist Publications. 20 August 1985. p. 7. Retrieved 23 April 2023.
^"Lok-ed Out". Crash. No. 26. Newsfield. 27 February 1986. p. 9. Retrieved 24 November 2022.
^Cite error: The named reference EG was invoked but never defined (see the help page).
^"Spectrum Elite has novel protection". Popular Computing Weekly. No. 35. Sunshine Publications. 29 August 1985. p. 4. Retrieved 24 November 2022.
Lenslok is a copy protection mechanism found in some computer games and other software on the Atari 8-bit computers, Commodore 64, ZX Spectrum, Sinclair...
of video games. Early copy protection measures for video games included Lenslok, code wheels, and special instructions that would require the player to...
attempts to read the parchment, they are referred to the game package. The Lenslok system used a plastic prismatic device, shipped with the game, which was...
documentation included with the game — often a novella — or the notorious Lenslok system. This had a set of plastic prisms in a fold-out plastic holder:...
1985 SuperBASIC Extension, Hisoft SuperCharge SuperBASIC compiler with Lenslok, Digital Precision SuperCharge Special Edition, Digital Precision SuperForth...