Recently I was writing a small routine for clearing memory and I thought to myself 'Doing this 4 bytes at a time is kind of a drag'. But I didn't want to write something that would require a cpu check. Then I realized there's a kind of 'move64' that all 68ks will do - movem.l d0-d7/a0-a7. Although in most cases, one address register is going to be needed as a pointer into memory. Not sure if that instruction works with a direct address...
