16bits had to be aligned. It didn't have an A0 because of the 16bit pathway, but it did have byte select lines (#UDS, #LDS) for when you'd move.b d0,ADDR so th

16bits had to be aligned. It didn't have an A0 because of the 16bit pathway, but it did have byte select lines (#UDS, #LDS) for when you'd move.b d0,ADDR so that devices external to the CPU could see an 8-bit data access if that's what you were doing.