cpu 68EC020
# Map any size ROM to a the (max) 512KB KB system ROM default address with OVL enabled.
+# The id=sysrom and id=sysram for the ROM and WTC RAM are necessary in order for the 68k Mac's OVL to function properly.
# (From what I could tell, the ROM was mirrored across this entire 512KB space regardless of physical capacity.)
-map type=rom address=0x400000 size=512K file=system.rom ovl=0 id=sysrom
+map type=rom address=0x400000 size=512K file=system.rom id=sysrom
# Map X KB/MB of RAM starting at $0. The type of this RAM map is "wtcram", which is short for Write Through Cache RAM.
# It appears that the Mac Classic sound/video chips can't write to RAM, only read from it, so this should be sufficient