Changes
/* 16-bit */
*[https://wiki.neogeodev.org/index.php?title=68k_instructions_timings 68k instructions timings]
*[https://raw.githubusercontent.com/larsbrinkhoff/m68k-microcode/master/doc/Yacht.txt Yet Another Cycle Hunting Table]
*[https://pasti.fxatari.com/68kdocs/68kPrefetch.html Instruction Prefetch documentation]
*[[Media:WD1772-JLG.pdf|Western Digital WD1772 FDC datasheet]]
*[[Media:MK68901 MFP datasheet.pdf|Motorola MK68901 MFP datasheet]]
