Re: Questions about CP/M on the Apple //e (and //c)

[hirsch@emba-news.emba.uvm.edu (Steven N. Hirsch)]

John Ruschmeyer (jruschme@csc.com) wrote:
: Two questions about Z80 cards and CP/M on the Apple // series:

: 1) Is the old Microsoft Softcard compatible with the //e? I have a clone
:    one which works fine on a ][+, but is not recognized on the //e.
:    Do I need a newer version of CP/M or to change a switch setting to make
:    it work?

The //e bus timing is a wee bit different from that of a ][+, and this
causes problems with most traditional softcard architectures.  Even
Microsoft branded boards are prone to this.  The only one that worked
reliably was Applied Engineering's Z80+, as I recall.  


: 2) A friend just bestowed a //c on me (rescued it from freezing on a curb).
:    Do I correctly recall that someone made a Z80 "card" for the //c?
:    If so, can someone give me a pointer?

Again, AE made a //c add-on that combined auxiliary memory with an
embedded Z80+.  They are long gone, but you may be able to unearth one
on the nets, or at a local swap meet.

- Steve

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|Steven N. Hirsch	"Anything worth doing is worth     |
|University of Vermont	 overdoing.." - Hunter S. Thompson |
|Computer Science / EE                                     |
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