Z80 Divide by 10
holger.veit at iais.fraunhofer.de
Sun Jan 27 10:58:13 CST 2008
Sean Conner said:
> I find it amazing that there's an instruction set even more annoying
> the 8086 (segments and all). I was amazed at the lopsidedness of the
> instruction set. I'm beginning to think I was lucky in skipping this
> particular chip (my first 8-bit was the 6809, so I think I got spoiled).
> There doesn't even seem to be an easy way to get the stack pointer, and
> only way I can see of doing it is:
> or a
> sbc hl,hl
> add hl,sp
> and no real good way of indexing the stack.
Move HL to IX or IY on the Z80 and you can have normal indexing. No
autoincrement and -decrement though, so no real push/pop and IX,IY are
just index registers, not stacks.
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