== Part numbers used in the Amstrad CPC during its lifetime ==
The Z80 CPU has been manufactured by others, and various Z80s have been used in the construction of the CPC during its lifetime.:
* SGS Z8400AB1
* ST Z8400AB1
* ZILOG Z8400APS
* ZILOG Z0840004PSC
All the Z80 CPUs that have been used on CPC and Plus machines are NMOS. [https://www.cpcwiki.eu/forum/amstrad-cpc-hardware/z80-cpu-nmos-or-cmos/ Source]
Zilog ended the production of the Z80 in April 2024. The chip is still available in ample quantities through NOS chip suppliers.