Date   : Fri, 10 Jul 1992 01:26:13 GMT
From   : sun-barr!cs.utexas.edu!sdd.hp.com!mips!mips!munnari.oz.au!metro!cs.uow.edu.au!cc.uow.edu.au!u8515682@ames.arc.nasa.gov (Wayne Jefferson Doust)
Subject: Re: undocumented Z80 Ops

Why did Zilog produce a chip with codes that were not documented?
I don't understand.

Wayne