|-
|#FEF0 - #FEF7||%11111110 11110xxx||[[CPC-CompactFlash]] - IDE registers||Read||Write
|-
|#FEF0 - #FEF7||%11111110 11110xxx||[[uIDE 16]] - IDE registers||Read||Write
|-
|#FFXX||%11111111 xxxxxxxx||[[CPC Booster]] (XX=#00..#28 are used now)||Read||Write