Re: 6502 illegal opcodes questions

[Eric Smith <eric@brouhaha.com>]

"John Selck" <gpjiweg@t-online.de> writes:
> And then we would have ended up like the Z80: That a copy loop is faster
> than the actual block copy instruction :D

Can you cite an example?  The block move instructions on the Z80 are
actually fairly efficient.  They use three memory cycles to move a byte,
vs. the theoretical minimum of two.  Doing a block copy via a software
loop is going to require at least five memory cycles per byte moved, and
probably more.