|#BFXX||%x0xxxx11 xxxxxxxx||6845 [[CRTC]] Data In (as far as supported)||Read|| -
|-
|#DFXX||%xx0xxxxx xxxxxxxx||[[Upper ROM Bank Number)]](bank 3 = Aleste Bootmenu)|| - ||Write
|-
|#F4XX||%xxxx0x00 xxxxxxxx||[[8255]] PIO Port A (PSG/8253 Timer/Real-Time Clock data)||Read||Write