> I do not think they are "so" important, since they never were missed by
>me... (-; This type of thing will take away the "register selection"
>task... (-;
If you think like this, you wouldn't need ANY new instructions! Ofcourse
you can do whatever new instruction the Z380 has in several legacy Z80
instructions, but I'd like to see how slow your implementation of "LD
DE,(SP-12)" would be! Or "EX B,B'" for that matter.
And they can be REALLY handy. The reason you never missed them, is because
you never thought about them as a possibility!
Heh, why don't you go program 6502? 3 registers, and only 8 bit at that! A
programmer doesn't need anything more, does he?
> >And as I stated above, most new instructions could also have been added to
> >the Z180... They have nothing to do with the extended address range etc.
>
> Yes, you are right. Some. But they are absolutely NOT 200% more than
>Z80 instruction set!
I haven't done the exact math, but when you look at the Z380 opcode tables,
it seems the instruction set has nearly doubled. And if you take into
account the enhanced Z80-instructions (16 bit indexing 'n stuff) it's easy
to get to that number.
Patriek
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