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From: ckp@grebyn.com (Checkpoint Technologies)
Newsgroups: comp.sys.amiga.tech,comp.sys.amiga.hardware
Subject: Re: 030 in 68000 package
Message-ID: <20205@grebyn.com>
Date: 3 Jul 90 14:37:02 GMT
References: <2695@zipeecs.umich.edu> <31234@cup.portal.com> <4699@munnari.oz.au>
Reply-To: ckp@grebyn.UUCP (Checkpoint Technologies)
Followup-To: comp.sys.amiga.tech
Organization: Grebyn Timesharing, Vienna, VA, USA
Lines: 24

In article <4699@munnari.oz.au> krooglik@moroka4.ecr.mu.oz (Alex KROOGLIK) writes:
> I would love to know how you could physically fit a 68030 in a 68000 package.
> For starters, the 68030 has 32 physical address lines, and using simple
> grade 2 arithmetic, that leaves 32 pins. I would love someone to tell me
> how you could add all of the complex external pin outs and ins of the 68030
> into a 64 pin DIP. Even the standard 68030 has around 114 pins (I think).

There's a rumor going around now that Motorola is preparing a "68025"
chip that offers a 68030 architecture (PMMU, co-processor interface, all
the 030 instructions and addressing modes) in a package that is
pin-compatible with the 68000 (which means a 24 bit address bus, 16 Meg,
and a 16 bit data bus).  This is supposed to be used by Apple in their
also-rumored low cost Mac.  So far it's all rumor, but who knows?

There were rumors once upon a time that Intel was making a 386 in a
286-pin-compatible package.  They were half true; Intel introduced the
386SX, which has the same size address and data bus as the 286 (24
address, 16 data) but the package is *not* pin compatible.  Motorola
may do that, so that they can salvage the 68030 synchronous bus modes...
-- 
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