This is a list of all known I/O ports of the Amstrad CPC, including all [[Peripherals]]. For a list showing only the built-in standard addresses see [[Default I/O Port Summary]].
== I/O Port Summary ==
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== Memory Mapped I/O Ports == {|{{Prettytable|width: 700px; font-size: 2em;}}|'''Mem'''||'''Decoded as'''||'''Port'''||'''Read'''||'''Write''' |-|#4000-7FFF||%01xxxxxx xxxxxxxx||[[ASIC]] - CPC+/GX4000 registers|| Read || Write|-|#????||%11xxxxxx xxxxxxx1||[[Dobbertin Smart Watch]] data read (D0=data)|| Read || -|-|#????||%11xxxxxx xxxxxDx0||[[Dobbertin Smart Watch]] data write (A2=data)|| Read || -|-|} == CPCISA ports for ISA cards==
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|''Device''||''PC I/O range''||''CPCISA high''||''CPCISA low''
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== CPCISA ports for ISA motherboard==
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|''Device''||''PC I/O range''||''CPCISA high''||''CPCISA low''