The is a list of all known I/O ports of the Amstrad CPC (copied from the [[FutureOS]] manual).
{|{{Prettytable|width: 700px; font-size: 2em;}}
|''I/O''||''Port''||''Read/Write''
|-
|#7FXX||[[Gate Array]]||Write
|-
|#BCXX||[[6845]] CRTC Address-Register||Write
|-
|}
<pre>
#7FXX : Gate Array write / -
#BCXX : 6845 CRTC Address-Register write / -
#BDXX : 6845 CRTC Data-Register write / -