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From: halkoD@batman.moravian.EDU (David Halko)
Newsgroups: comp.sys.m6809
Subject: Re: COCO 128->512K
Summary: 512K Upgrade
Keywords: Different kits?  Mailorder?
Message-ID: <3138@batman.moravian.EDU>
Date: 14 Mar 91 21:05:53 GMT
References: <1991Mar2.063830.7791@cbnewse.att.com>
Distribution: na
Organization: Moravian College, Bethlehem, PA
Lines: 21

In article <1991Mar2.063830.7791@cbnewse.att.com>, gmark@cbnewse.att.com (gilbert.m.stewart) writes:
> 
> All,
> 	I'm about to upgrade the COCO III I just bought from 128K to
> 512K.  What thoughts do people have regarding Tandy upgrade kits, other
> company's kits, "Bare" boards ("Owl" for instance), etc..  What 
> chips do they use in the "piggy-back" kits?  INthanksADVANCE.
> 
> G. Mark Stewart
> IX1g266
> ihlpq!gms

Most of the upgrades which I have seen for 512K use plug-in boards which
recommend the chopping of a capacitor on the motherboard, and that is
about all... no piggy-backing... (heck, the CoCo3 runs with 128K just
fine with the Cap clipped, too!)

There is a B&B 256K upgrade which uses piggybacking to get the extra
512K... that upgrade uses 64K x 4Bit chips...

Dave Halko