How CPU's work (was Re: Hi, I'm new...)

woodelf bfranchuk at jetnet.ab.ca
Tue Aug 8 11:44:14 CDT 2006


Chuck Guzis wrote:

> I've wondered about something for years, however.  Did anyone ever make use
> of the fact that an INI or OTI instruction placed the contents of both the
> B and C registers on the Z80 address bus?  It would seem to be a simple way
> of expanding the I/O space to 64K ports.
Yes, the 8088 did.
> Cheers,
> Chuck




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