RE: [N8VEM: 13962] 68030 SBC project ideas

["Andrew Lynch" <LYN...@YAHOO.COM>]

Hi Michael!  Thanks!  I stand corrected!  That is a beautiful design.
Exactly what I was hoping to find!

I gather the equations for the CPLD are available?  Also with some research
do you think the design could be modified for 68040 operation?  That would
consolidate the 68020/68882 into a single large IC with an integrated MMU.

Thanks and have a nice day!

Andrew Lynch

PS, as much as I am reluctant to admit it, the 68040 board may require the
use of CPLD to consolidate the bus glue logic.   There is a *lot* of glue
logic on the S-100 68K CPU board.  I am trying to simplify the SBC
assumptions by excluding an external bus connection like ECB or VME and also
complex IO like floppy controller or IDE.  The principle reason being having
to fit all the components onto a 60 square inch PCB will be challenging.

> -----Original Message-----
> From: n8...@googlegroups.com [mailto:n8...@googlegroups.com] On
> Behalf Of Michael Haardt
> Sent: Saturday, June 23, 2012 4:39 PM
> To: n8...@googlegroups.com
> Subject: Re: [N8VEM: 13962] 68030 SBC project ideas
> 
> > Probably the closest hobbyist system available now is this one from
> > Indiana University in 1994
> 
> Not quite.  Are you aware of this?
> 
> http://schuetz.thtec.org/nkc2/68020/68020.html
> 
> There are other boards to go with it.  The NKC is a German system which
> started with a Z80 and its own bus, and then later switched to ECB and
used
> all kinds of CPUs.
> 
> Michael
> 
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