Changes
/* Ext Port */
|3||force video to black
|-
|2||enable/disable MAPMOD (changes how colour is decoded * When 0: Uses CPC-style 27-color palette and how CPC6128-style RAM banking* When 1: Uses MSX-style 64-color palette and MSX-style RAM mapper values are decoded)(the MSX-style stuff is MSX-inspired,but not compatible with real MSX I/O addresses)
|-
|1||Enables high resolution in X. Also changes some clock frequences. Controls decoding of video address.
