[Coco] Had again

[Bill]

Yeah, I've learned that the first thing I do when I get anything with edge
connectors is to "erase" them. Makes no difference. I actually suspect the
Coco1 (it is in NO WAY virgin). I'm gonna open it up again and check to see
if the chips are all set properly.

BTW, what would happen if I took chips out of the trashed Coco2 and put them
in the Coco1? 

-----Original Message-----
From: coco-bounces at maltedmedia.com [mailto:coco-bounces at maltedmedia.com] On
Behalf Of Arthur Flexser
Sent: Saturday, June 22, 2013 5:00 PM
To: CoCoList for Color Computer Enthusiasts
Subject: Re: [Coco] Had again

Assuming the controller's contracts (on both surfaces) are bright and
shiny, and that you'v e tried the pencil eraser cleaning method....

my next suspect would be the 6809.  Perhaps it is getting stuck in
HALT mode during DSKINI and memory is going too long without refresh??

Another possible suspect is bad index hole detection, which is only
used during DSKINI.  Though I wouldn't think that would cause a crash
of the sort you describe.

Art

Art


On Sat, Jun 22, 2013 at 6:40 PM, Bill <cwgordon at carolina.rr.com> wrote:
> Well, wouldn't ya , know it? I finally figured out how to get a couple of
> drives, and the one that costs the most, is the dud! It's a Radio Shack
Mini
> Disk (unopened) with no label. The controller is a 26-3029 (also
> unopened-the seals are in place.)
>
>
>
> Attached to the Coco 1, I tried a couple of used disks in it, and it reads
> and writes without a problem. I put in a new unformatted disk, and type
> DSKINI0, and the light comes on, it clicks and whirrs a little, then
nothing
> but "interference" on the TV screen. It doesn't even IO out.
>
>
>
> I'm hoping it's something very simple, but I don't know. Can't tell if
it's
> the Coco, the controller, or the drive itself.
>
>
>
> Ideas?
>
>
>
> Thanks
>
>
> --
> Coco mailing list
> Coco at maltedmedia.com
> http://five.pairlist.net/mailman/listinfo/coco

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