Changes

DJL (Dave J Looker) was is mainly known as the co-author of the [[Speedlock|Speedlock]] protection system, a fastloader used on many cassette games released in the UK. Speedlock , but he was a modified version also the author of the [[Spectrum]]several Amstrad games including 3d Stunt Rider and Nigel Mansell's cassette routines with protection addedGrand Prix.

As Speedlock was a modified version of the protection system continued to evolve, programs such as [[Soft-LokSpectrum|Spectrum]] and the [[Bonzo]] suite were upgraded to break the 's cassette routines with protectionadded.

As the protection system continued to evolve, programs such as [[Soft-Lok|Soft-Lok]] and the [[Bonzo|Bonzo]] suite were upgraded to break the protection.  A separate disc protection system, [[8k Speedlock|8k Speedlock]], relied on the fact that the CPC's hardware could reliably read but not write 8k sectors. To get around this, the [[Executioner|Executioner]]'s utility [[Xexor|Xexor]] included a 'brain file' solution to crack individual games before copying them.