[Coco] Kip's Single Board Computer

[Kip Koon]

Hi Jim,
So far my results are the same.  If I come up with anything, I'll let you know.  Keep up the good work.

Kip Koon
computerdoc at sc.rr.com
http://www.cocopedia.com/wiki/index.php/Kip_Koon



> -----Original Message-----
> From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of RETRO Innovations
> Sent: Monday, September 07, 2015 12:11 PM
> To: CoCoList for Color Computer Enthusiasts
> Subject: Re: [Coco] Kip's Single Board Computer
> 
> On 9/7/2015 10:22 AM, Darren A wrote:
> > On Mon, Sep 7, 2015 at 12:18 AM, RETRO Innovations wrote:
> >
> >> Kip, working on debugging your 8 IC SBC, and I have a question:
> >>
> >>   * The CPU on this board is a 62C09P, which it appears will run up to
> >>     3MHz, but you've installed a 7.37MH Crystal on the board. Was that
> >>     by design?  Am I missing something (like the 6309/6809 divides the
> >>     clock by some value?)
> >>
> >> Otherwise, I think this SBC is not going to work unless we put a
> >> slower crystal in the design.
> >>
> >
> >
> > The 6309 works just like the 6809 (non-E versions). They divide the
> > frequency on the EXTAL pin by four to get the bus frequency (E and Q).
> >
> > - Darren
> >
> Thanks.  Figured it out this morning when I woke up (duh, how else to get the quadrature timing), but something is wrong with the
> PCB. I pulled a 6809 from a SuperPET and both 63C09 and 6809 are not oscillating on the EXTAL/XTAL pins, and no E or Q is present.  I
> pulled the CPU and put it on a breadboard without change.  My Coco3 CPU is soldered in, or I would swap them out to check, but I
> find it odd that two CPUs are bad.  !HALT is high, as is reset, so I should be seeing Q and E on my scope.
> 
> It's a bummer, as I have a 80 channel Logic Analyzer here just waiting to see signals from the '09
> 
> Jim
> 
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