bugfix... RAMWRT instead of RAMRD
potential bugfix for iie_dhires_on, iie_dhires_off
Beginning to refactor memory.S -> vm.c
refactor PAGE2 switch to C
refactor TEXT and MIXED switches to C
refactor HIRES switch to C
refactor game controller switches to C
removed unused ][ rom stuff
refactor language card switches to C
refactor 80STORE switch to C
refactor RAMRD,RAMWRT switches to C