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From: 33500911@sdcc13.UUCP ({|lit})
Newsgroups: net.micro.apple
Subject: Re: Apple ][+ vs //e board compatability
Message-ID: <388@sdcc13.UUCP>
Date: Wed, 11-Dec-85 22:33:04 EST
Article-I.D.: sdcc13.388
Posted: Wed Dec 11 22:33:04 1985
Date-Received: Sat, 14-Dec-85 03:45:56 EST
References: <116@tetra.UUCP> <9800027@uiucuxa>
Reply-To: 33500911@sdcc13.UUCP (Rain Maker)
Distribution: net
Organization: U.C. San Diego (Isn't hail fun?) Weather Control Lab
Lines: 35
Keywords: Microsoft Z-80 Z80 Softcard
Summary: Bad Timing

From the fingers of Benjy Mouse at uiucuxa.CSO.UIUC.EDU (U of I):
>
>  The Hayes Micromodem ][ will work just fine with the //e, however, there
> may be some problems with the Microsoft Softcard...I believe that if you have
> an extended 80-column card in slot 0, you may have some trouble with it. When
> I boot up the Microsoft CP/M disk, the screen clears, and goes into 80-column
> mode, but doesn't display anything. The card worked fine on my ][+, but it
> hasn't worked too well (ie not at all) on my //e...I'm going to see if its
> something I'm doing, but I don't think it's me...
>
> Benjy Mouse
> University of Illinois

Yup.  The person (dare I call him an 'engineer') who designed the
original MS Softcard took quite a few liberties with the ][ and ][+
timing.  The Z80 mode got fouled up do to the Softcard mis-calculating
bus acceses.  They came out with a fix.

Same thing happened with AE (ithink) and Orbital systems (I know.)
when the //e came out.

For all intents and purposes, the older Hayes MM]['s shouldn't work
on a //e.  That's why there's a Micromodem //e.  You must have
an earlier model.

--
                                           - Jim Hayes


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