== Non-Amstrad Chips ==
The following part numbers come from the service manuals and help to 'fill in the blanks' with the 4xxxx number rangesrange, these will not have 'AMSTRAD' on them:
Part Description
40001 AY-3-8912 Sound chip
40011 74LS08
40012 74LS27
40013 74LS32
40014 74LS74
40016 74LS136
40017 FDC9229BT Data Separator
40018 UPD765AC Floppy disc controller
40019 DN74LS3874LS38
40020 FDC9216BT Data Separator
40080 Z8400APS CPU
171034 SED9420CAC Data Separator
== Amstrad originated Chips ==