Path: utzoo!attcan!uunet!husc6!bloom-beacon!tut.cis.ohio-state.edu!mailrus!ames!pasteur!ucbvax!RADC-TOPS20.ARPA!GUBBINS
From: GUBBINS@RADC-TOPS20.ARPA (Gern)
Newsgroups: comp.sys.zenith.z100
Subject: Re: Using Compupro SPUZ z80 slave board with z100
Message-ID: <12400657288.8.GUBBINS@RADC-TOPS20.ARPA>
Date: 23 May 88 18:04:58 GMT
References: <2083@ur-tut.UUCP>
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 19

It would be very interesting to try.   A cheaper solution appeared in
either REMark or Sextant where a person replaced the Z-100 8085 with a
Hitachi Z-80 superset chip and a small kludge board it fit in.

The TM-100 is quite large, but I have been thinking about slowly feeding
it into the OCR for everyone.  I am going to consult ZDS/Heath about
their copyrights on it, as I don't think they really care about providing
it anymore.

The Z-100 reserves I/O addresses 128-255 for the Z-100, floppy, winnie,
256K RAM board, NETcard, secondary floppy, winnie controllers, etc.
Any address 0-127 is okay, unless you are using a PC emulator board,
then it is a guess.  Also note that the I/O decode only looks at the 
LSByte of the address, so the Z-100 ports roll over in the address space
every 256 addresses.

Cheers,
Gern
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