*[http://www.zock.com/8-Bit/D_CPCguide.HTML G.o.St.-SOFT's CPC-Hardwareführer at 8-Bit-Nirvana (DE)] - lots of tips and tricks, but no recent updates
*[https://www.oocities.org/siliconvalley/park/6129/engmain.htm Virtual Net 96] - Amstrad CPC network protocol
*[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