|-
|#FC00 - #FDFF||%1111110x xxxxxxxx||[[CPCISA by Yarek|CPCISA]] 16bits mode high byte latch||Read||Write
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|#FC00||?||[[M4 Board]] ACK/KICK|| - ||Write
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|#FC5C||?||[[Z80-SIO dual ports RS232 interface for CPC (French)|French DIY Dual Port RS232]] - Baudrate Selection|| - ||Write
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|#FDE7||?||RS Port - [[IDE8255]]||Read||Write
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|#FE00||?||[[M4 Board]] Data|| - ||Write
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|#FE00 - #FFFF||%1111111x xxxxxxxx||[[CPCISA by Yarek|CPCISA]] I/O access (low byte)||Read||Write