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Tag: Reverse Engineering

DiscSys – XOR

DiscSys was a commonly used Disk Protection format in the 80s for the Amstrad CPC. For a protection system it was very basic, relying on modifying track and sector information to non standard formats to prevent copying with the supplied tools. Though it was very trivial to bypass the protection system and copy the disk anyway. Whilst reminiscing about the past, I discovered a small flaw with implementation in the game XOR, here’s what I found…

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Speedlock 1987

Speedlock '87 was a prolific Tape Protection System and Turbo Load for the Amstrad CPC and ZX Spectrum. In this post I look at the protection system and how to hack to it using the same tools available to me in 1987 as a young teenager.

Amstrad CPC Magnum Light Gun

Recently I was asked to provide some information on the Amstrad Magnum Light Gun, and so I fired up the old hardware, loaded up my Assembler and Monitoring Tools and set about reverse engineering this legacy and rare piece of kit.