40010 Gate-Array version 3 (HSG3170) (used in newer CPC464 and in CPC664/6128; no heat sink)
40015 16K ROM; AMSDOS for CPC664/CPC6128 and DDI-1 disc interface
40022 32K ROM; BIOS and BASIC for CPC664 (region unknown?English)
40025 32K ROM; BIOS and BASIC for CPC6128 (English)
40026 PCW8xxx printer controller ASIC