Re: 6502 illegal opcodes questions

[heuser.marcus@freenet.de]

> LDIR eats 21 clock cycles per iteration, doing the same with other Z80
> instructions can be way faster.
>
> I tried to use the Z80 in the C128 for block copy/fill because I thought
> "hey, it has a block copy command, so I guess it is fast" but it wasn't.
> Then I tried normal opcodes, it was way faster than using LDIR but still
> not faster than copying the stuff with the 8502.

But if the 6502-designers had chosen to implement a block move then
of course it would've been way faster!  ;o)

bye
Marcus