Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!uwm.edu!ogicse!zephyr.ens.tek.com!tekcrl!tekgvs!paulba
From: paulba@tekgvs.LABS.TEK.COM (Paul T. Barton)
Newsgroups: comp.sys.m6809
Subject: 6809 faster than 2MHz ...
Message-ID: <7050@tekgvs.LABS.TEK.COM>
Date: 8 Mar 90 21:15:54 GMT
Reply-To: paulba@tekgvs.LABS.TEK.COM (Paul T. Barton)
Distribution: usa
Organization: Tektronix, Inc., Beaverton,  OR.
Lines: 21

To: comp.sys.m6809
Subject: Re: 6809 greater than 2 Mhz ( YES!!! )
Organization: Tektronix, Inc., Beaverton,  OR.

	I have tried to reply to the person asking about fast
6809 procesors,  no luck :-)  So ...

	When I say 3MHz, I mean 3MHz for the E clock time.

	I have used the Hitachi 63C90E (3MHz). They also have
peripherals such as 63B21 (3MHz), yes a different letter for 3MHz!
I have used these chips in a home-brew system using a 6551a acia,
with NO serial dropouts, (250ns access time, using E or'ed with Q for
VMA).  Oh, by the way it runs FORTH & really screams.

Paul Taylor Barton
MAIL:   Tektronix, Inc. PO Box 500, MS 50-370
	Beaverton, OR. 97077   (503)-627-6134
UUCP:   uunet!tektronix!tekgvs!paulba
ARPA:   paulba%tekgvs.LABS.TEK.COM@RELAY.CS.NET
CSNet:  paulba@tekgvs.LABS.TEK.COM