== Memory Mapped I/O Ports ==
{|{{Prettytable|width: 700px; font-size: 2em;}}class="wikitable"|'''!Mem'''||'''!Decoded as'''||'''!Port'''||'''!Read'''||'''!Write'''
|-
|#4000-7FFF||%01xxxxxx xxxxxxxx||ASIC - CPC+/GX4000 registers|| Read || Write
The [[ASIC]] I/O page is defined as follows:
{|{{Prettytable|width: 700px; font-size: 2em;}}class="wikitable"! ADDR !! SIZE !! POR !! TYPE !! MNEM !! USE
|-
| 4000h || 100h || N || R/W || || Sprite 0 image data