The is a list of all known I/O ports of the Amstrad CPC (copied from the [[FutureOS]] manual).
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|#FC00 - #FDFF||%1111110x xxxxxxxx||CPCISA 16bits mode high byte latch||Read||Write
|-
|#FD00 - #FD3F||%11111101 00xxxxxx||[[Programming:SYMBiFACE_II|SYMBiFACE II]]||Read||Write
|-
|#FE00 - #FFFF||%1111111x xxxxxxxx||CPCISA I/O access (low byte)||Read||Write