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From: winkler@HARVARD.ARPA@sri-unix.UUCP
Newsgroups: net.micro.apple
Subject: Re: Z-80 CARD PROBLEMS
Message-ID: <12752@sri-arpa.UUCP>
Date: Thu, 23-Aug-84 18:49:03 EDT
Article-I.D.: sri-arpa.12752
Posted: Thu Aug 23 18:49:03 1984
Date-Received: Thu, 30-Aug-84 00:46:21 EDT
Lines: 9

From:  Dan Winkler <winkler@HARVARD.ARPA>

>        What speed is the z80 running at?? If it's a Z80B then it is
>        probably running at 6mhz and that is too fast for the apple ram!!
  
I have a PCPI AppliCard which does indeed run at 6mhz (it's great!).  They
manage it by giving the card 64K of its own memory.  It also makes clever
use of the Apple memory -- it stores CPM there.  That way, it never needs
to go back to the system disk once it has booted.