[Coco] OT: 63B09

Louis Ciotti lciotti1 at gmail.com
Sat Oct 29 13:48:17 EDT 2011

I can across an NTE6809 processor and thought I would give it a try as a
replacement for the 63b09.  It has an identical Pinot so I figured it may
work.  I plug it in the socket, and I get nothing at all.  The external
clock (4mhz) crystal does not even work, which on the one I am trying to
replace does.  Is the IC bad, or is it a compatibility issue.

On Thursday, October 20, 2011, Louis Ciotti <lciotti1 at gmail.com> wrote:
> Off topic, but since the CoCo uses 6809s, figured someone on here might
know about this.
> I have a radio controller from circa late 80s that uses a 63B09 that I
think may be bad.  What can I use in its place and is there a source?
> The problem I am seeing is RN6(Pins 24-31) has some "noise" on the line
and the waveform is not exactly square like the rest of the data lines when
observed with an oscilloscope.

More information about the Coco mailing list