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From: miker@uwmacc.UUCP (m radovancevich)
Newsgroups: comp.sys.mac
Subject: Re: Rumours on slotted/colour/68020 Mac?
Message-ID: <589@uwmacc.UUCP>
Date: Wed, 26-Nov-86 16:19:03 EST
Article-I.D.: uwmacc.589
Posted: Wed Nov 26 16:19:03 1986
Date-Received: Wed, 26-Nov-86 20:50:38 EST
References: <6601@decwrl.DEC.COM>
Reply-To: miker@uwmacc.UUCP (m radovancevich)
Organization: UWisconsin-Madison Academic Comp Center
Lines: 25

In article <6601@decwrl.DEC.COM> puckett@gidday.dec.com (Open the pod bay doors please HAL) writes:
>whether to but a Mac+ or wait for something better. Has anyone heard of
>any compatibility issues w.r.t. large screens, 68020, OS changes, etc?
>If the processor family is as upward compatible as it claims, why does
>MacWrite need a patch to work with Levco's 68020?
>
>= Giles Puckett = 

Just because a CPU is upwardly comptible, it does not mean that the programmers
are.  Macwrite 4.5 does some not so nice things with the TRAP instructions
that cause problems on the 68020.  There is a good write up on this and other
68020 concerns in the Technical Notes section of the November Mac Tutor.

There is also a Tech Note from Apple (#2?) that may cover compatibility
problems.

That issues Mousehole Report also mentions the new machines from Apple
and probably the most interesting item is that Rusty Hodge thinks that
Apple will hold the new big machine for the 68030.  I don't know about
that one.  Unless they have been planning on using it for some time, the
recoding of the OS and redesign of the motherboard will cost lots of
$$$ and time.  But 8 MIPS sounds nice...


Mike Radovancevich