Editing Amstrad CPC (section)

===Processor===
The entire CPC series is based on the [[Zilog Z80]]; a processor, clocked at 4&nbsp;[[Hertz|MHz]].<ref name="464 Tech spec">Technical Specification, CPC464 Service Manual, p. 2., Amstrad Consumer Electronics Plc.</ref> In order to avoid the CPU and the video logic simultaneously accessing the shared main memory and causing video corruption ("snowing"), CPU memory access is constrained to occur on [[microsecond]] boundaries. This effectively pads every machine cycle to four [[clock cycle]]s, causing a minor loss of processing power and resulting in what Amstrad estimated to be an "effective clock rate" of "approximately 3.3&nbsp;MHz".<ref name="SOFT968">CPC464/664/6128 Firmware (Soft 968), Section 1</ref>