|#F7XX||%xxxx0x11 xxxxxxxx||[[8255]] PIO Control-Register|| - ||Write
|-
|#F880-#F88F||%1111 1000 1000 BBCC||[[PlayCity]] Expansion (CTC #F880-F883, YMZ Right #F884 and YMZ Left #F888DATA)|| - || Write
|-
|#F890-#F8AF||%1111 1000 10xx xxxx||[[ACME]] WIP Expansion|| ? || ?
|#F8FF||N/A||[[Peripheral Soft Reset]] (MC_BOOT_PROGRAM and MC_START_PROGRAM do OUT [F8FF],FF)|| - ||Write
|-
|#F980 - #F98F||%1111 1001 1000 BBCC||[[PlayCity]] (YMZ Right #F984 and YMZ Left #F988REGISTERS)|| - || Write
|-
|#F990 - #F9AF||%1111 1001 10xx xxxx||[[ACME]] WIP Expansion|| ? || ?