|#F8FE||%11111000 11111110||[[Z-MEM]] Software Memory Configuration|| - || Write
|-
|#F8FF||%1111100x 111xxxxx||[[CPCISA by Yarek|CPCISA control port]]|| - ||Write
|-
|#F8FF||%xxxxx0xx 111111xx||[[Peripheral Soft Reset]] (MC_BOOT_PROGRAM and MC_START_PROGRAM do OUT [F8FF],FF)|| - ||Write
|#FBFF||?||[[ACU Real Time Clock (DIY)]] Z80-PIO Configure Port B ||Read||Write
|-
|#FC00 - #FDFF||%1111110x xxxxxxxx||[[CPCISA by Yarek|CPCISA]] 16bits mode high byte latch||Read||Write
|-
|#FC00||?||[[M4 Board]] ACK/KICK|| - ||Write
|#FE00||?||[[M4 Board]] Data|| - ||Write
|-
|#FE00 - #FFFF||%1111111x xxxxxxxx||[[CPCISA by Yarek|CPCISA]] I/O access (low byte)||Read||Write
|-
|#FE80 - #FE81||%11111110 1000000x||[[Albireo]] CH376 controller||Read||Write