|-
|#7CXX||?||[[CPC4MB|4Mb Memory extension]]||-||Write
|-
|#7CXX||%0xxxxx00 xxxxxxxx||[[Aleste 520EX]] RAM Mapper page 0 (extended "Gate Array 3")||Read||Write
|-
|#7DXX||?||[[CPC4MB|4Mb Memory extension]]||-||Write
|-
|#7DXX||%0xxxxx01 xxxxxxxx||[[Aleste 520EX]] RAM Mapper page 1 (extended "Gate Array 3")||Read||Write
|-
|#7EXX||?||[[CPC4MB|4Mb Memory extension]]||-||Write
|-
|#7EXX||%0xxxxx10 xxxxxxxx||[[Aleste 520EX]] RAM Mapper page 2 (extended "Gate Array 3")||Read||Write
|-
|#7FXX||?||[[CPC4MB|4Mb Memory extension]]||-||Write
|-
|#7FXX||%0xxxxx11 xxxxxxxx||[[Aleste 520EX]] RAM Mapper page 3 (extended "Gate Array 3")||Read||Write
|-
|#7FXX||?||[[Dk'tronics memory expansion]]||-||Write
|-
|#EEXX||%xxx0xx10 xxxxxxxx||[[KC Compact]] CIO Control|| Read ||Write
|-
|#EEXX||%xxx0xxx0 xxxxxxxx||[[Aleste 520EX]] USART 8251 (RS232/Mouse) Data|| ? ||Write
|-
|#EFXX||%xxx0xx11 xxxxxxxx||[[KC Compact]] CIO Port A (Bi-drectional [[Printer Port]])|| Read ||Write
|-
|#EFXX||%xxx0xxx1 xxxxxxxx||[[Aleste 520EX]] USART 8251 (RS232/Mouse) Control|| ? ||Write
|-
|#EFXX||%xxx0xxxx xxxxxxxx||[[Printer Port]]|| - ||Write
|-
|#FA7E||%xxxxx0x0 0xxxxxxx||Floppy Motor Control (for [[765 FDC]])|| - ||Write
|-
|#FABF||%xxxxx0x0 1xxxxxxx||[[Aleste 520EX]] EXTPORT (config for internal hardware)|| - ||Write
|-
|#FADC||?||[[Amstrad Serial Interface]] Z80-SIO / DART port A Data Register||Read||Write