[Coco] Weird CoCo3 problem...

[Mike Pepe]

I suspect the 6809 as well. But if you do a poke &HFF40,1 the drive 1 activity light should go on. If not something else may be wrong.

> -----Original Message-----
> From: coco-bounces at maltedmedia.com [mailto:coco-
> bounces at maltedmedia.com] On Behalf Of Brian Blake
> Sent: Friday, January 01, 2010 2:36 PM
> To: CoCoList for Color Computer Enthusiasts
> Subject: Re: [Coco] Weird CoCo3 problem...
> 
> Hi Arthur,
> 
> Unfortunately, it's not socketed. Tho, I have about 9 6309's and plenty
> of sockets... hmmmm.... maybe tomorrow....
> 
> 
> 
> ________________________________
> From: Arthur Flexser <flexser at fiu.edu>
> To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
> Sent: Fri, January 1, 2010 3:56:15 PM
> Subject: Re: [Coco] Weird CoCo3 problem...
> 
> I vaguely recall something like this happening to me years ago that was
> fixed by replacing the 6809.  If this machine and one of your others
> has had
> the 6809 socketed, it would be easy enough to swap in a 6809 from one
> of the
> other machines and see if the problem goes away.
> 
> Art
> 
> On 1/1/10, Brian Blake <random_rodder at yahoo.com> wrote:
> >
> >
> >
> > All of these new developments on the CoCo front finally lit the fire
> under
> > my arse to set up real hardware again. Besides my repack project, I
> have 3
> > other CoCo3's, two with 512k upgrades (one C9 and one PBJ) and one
> 128k. The
> > one with the C9 upgrade works fine - can load and play Sockmaster's
> Donkey
> > Kong.
> >
> > The one with the PBJ upgrade, not so... At boot, it comes up as it
> should
> > with the proper display. However, any floppy commands are met with no
> > response from the floppy drive (with an FD-502 controller) at all.
> Almost
> > like the drive is off. The drive responds as it should in the other
> two
> > machines. Upon removing the top case and k/b, I saw two wires, each
> had been
> > soldered to opposite sides of R23. Now, under the keyboard, is
> another wire
> > with alligator clips on each end, and the clips are holding on to the
> bare
> > end of the wires soldered to R23, effectively bypassing the resistor.
> I'm
> > looking for the PBJ instructions, pretty sure I have them, to find
> out if
> > this is called for. I can also see where C65 & C66 have been cut and
> > re-soldered. I have reseated the GIME and the PBJ memory chips, and
> cleaned
> > the 40 pin connector.
> >
> > Any other suggestions? My 100MHz o'scope bit the dust so I don't have
> that
> > tool any more (anybody have a CRT for a Leader 3 channel 100MHz
> scope??)
> >
> >
> > Thanks,
> >
> > Brian
> >
> >
> >
> >
> >
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> > Coco at maltedmedia.com
> > http://five.pairlist.net/mailman/listinfo/coco
> >
> 
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> 
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