[Coco] Coco 2b problem: reboots when accessing the disk

[Mark McDougall]

On 26/02/2013 4:26 PM, Arthur Flexser wrote:

> I think I had something like that years ago that turned out to be due to a
> flaky 6809.  You might try seeing if the problem persists when you swap
> in the 6809 from your CoCo 3.

That's a rather unscientific approach to the problem. But hey, you never
know...

>> This problem doesn't happen with the superIDE. I measured the voltage (with
>> a multimeter) and I didn't see any voltage drop (+5v).

If you have a transient drop when the drive is first accessed, then you
won't see it with a multimeter.

I can't offer a solution but I suspect you'll need more comprehensive
diagnostic tools. I'd persist with the cap replacement if all else fails,
because it does sound like a power surge (supply) issue.

Regards,

-- 
|              Mark McDougall                | "Electrical Engineers do it
|  <http://members.iinet.net.au/~msmcdoug>   |   with less resistance!"