As far as I can tell, it was _rumored_ to use a 65802 (a 65816 that's pin compatible with a 6502 and therefore is limited to 64k and lacks the abort pin) but ac

As far as I can tell, it was _rumored_ to use a 65802 (a 65816 that's pin compatible with a 6502 and therefore is limited to 64k and lacks the abort pin) but actually used a 65CE02 (8 bit with a handful of 16-bit instructions). The 65802 would give you true 16-bit registers but all the instructions and address modes for using other banks are wasted. (phk, phb, plb, jsl, jml, rtl, absolute long, absolute long,x indirect long, indirect long,y)