|#FEE7||?||Port C - [[IDE8255]]||Read||Write
|-
|#FEE8||?%11111110 1110100x||[[Multiface II]]- Enable Multiface II ROM/RAM||?-||?Write
|-
|#FEEA||?%11111110 1110110x||[[Multiface II]]- Disable Multiface II ROM/RAM||?-||?Write
|-
|#FFXX||%11111111 xxxxxxxx||[[CPC Booster]] (XX=#00..#28 are used now)||Read||Write