Re: Expanding a CBM 610

From: Ethan Dicks (
Date: 2008-03-18 16:57:33

On Tue, Mar 18, 2008 at 3:39 PM, B Degnan <> wrote:
>  FYI There is one maybe two known "real" factory B256 prototypes in the
>  United States (they were not called B256 however, these units have no
>  labels at all).  There were no production B256's.  I believe that there
>  were heat issues (if not other issues), to explain why the low profile
>  systems produced by Commodore were only 128K.

With modern components, perhaps one way around that would be to
use eight 44C256s?  Looking at the board in front of me, I don't think
it would be
tricky to rig them up to the existing board holes.

Of course, a couple of large SRAMs could also work, but might require
a bit more work to fit in.

>  There is a 1MB expansion kit for the B series. I have a schematic and some
>  parts.  I apologize that I have been behind getting this info and the fast
>  bus out to this group.

That sounds interesting.  I'm not in a hurry for it, but I look
forward to seeing it when you have the time.


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