Doh! You're correct - and I should have known that since the 6502 design was based on a greatly cost-reduced Motorola 6800, the 6809's dad. Somehow I bit-flipped between the 6502/Z80 (not microcoded) and the 8088 (microcoded). Thanks for the correction.

Re: the Vectrex, I never knew that but it makes sense since chasing the beam requires feeding a massive queue of vector pairs.