[Someone]

I'm not saying one should expect or demand it in a project like this, but minimalistic pipelining should be doable; both the 6502 (http://www.6502.org/users/andre/65k/arch.html#pipelining) and (IIRC) the 8080 started fetching the next instruction before finishing execution of the current one, where possible.

[to3m]

Do you have an example of a case where this provided a performance benefit to 6502 code?