> Precisely what I thought. The minimum amount of time taken by a Z80 > instruction on the Sam in 6MHz T-states is 4 times the number of RAM > accesses (and that's with the screen turned off). If all you are doing > is replacing the Z80 by a Z_something_else then instructions which have a > lot of logic and a little memory access (like ADD HL,BC) will speed up, > but most instructions (like NOP) will hardly speed up at all unless you > store them in ROM or in extended memory.
This is true of just about any processor, though - accessing memory is the slowest thing it can possibly do (barring floating point, perhaps) and the only way to sort it out is to add cache memory or get faster RAM... > > imc > Nige
