That's really interesting. Shows that optimising for each CPU presented a different challenge each time. I remember hearing Steve Furber say that they realised

That's really interesting. Shows that optimising for each CPU presented a different challenge each time. I remember hearing Steve Furber say that they realised that memory bandwidth was the biggest constraint in 8/16 bit CPUs so the ARM1/2 really focused on this and it shows (in fact I think they approached Intel with the idea of commissioning an 8086 with more bandwidth but were turned away - funny how things work out).