*[https://bread80.com/category/amstrad-cpc/ bread80.com] - some analysis of Firmware and BASIC logic (and also the video subsystem- hardware)
*[http://www.amstradtoday.com/ Amstrad Today (FR)] - Many Tips for Amstrad CPC
*[https://www.centpourcent.net/ Cent Pour Cent] TotO's MX4 hardware expansions
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