[Coco] Problem w/HDBDos chip

[Chad H]

As Arthur suggested maybe clean the card edge contacts.  Doubtful it’s a 6809 problem since your standard issue FD501 controller didn’t have any problems.  Hopefully your controller IC didn't croak.  I blew mine on my FD500 and am getting the exact same behavior.

-----Original Message-----
From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of Bill
Sent: Sunday, February 08, 2015 12:58 PM
To: 'Bill Pierce'; 'CoCoList for Color Computer Enthusiasts'
Subject: Re: [Coco] Problem w/HDBDos chip

I don't know, how can I tell?

Besides, the same set of drives it's been working perfectly on for the last year now exhibits the same problem.

-----Original Message-----
From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of Bill Pierce via Coco
Sent: Sunday, February 08, 2015 9:46 AM
To: coco at maltedmedia.com
Subject: Re: [Coco] Problem w/HDBDos chip


Are the drives by any chance 5.25 80 trk drives?
If so, then that would explain it. Other than that, ????
 

Bill Pierce
"Today is a good day... I woke up" - Ritchie Havens
 

My Music from the Tandy/Radio Shack Color Computer 2 & 3 https://sites.google.com/site/dabarnstudio/
Co-Contributor, Co-Editor for CocoPedia
http://www.cocopedia.com/wiki/index.php/Main_Page
E-Mail: ooogalapasooo at aol.com


 
 
-----Original Message-----
From: Bill <cwgordon at carolina.rr.com>
To: Coco Enthusiasts <coco at maltedmedia.com>
Sent: Sun, Feb 8, 2015 9:38 am
Subject: [Coco] Problem w/HDBDos chip


I have two HDBDos eprom chips that have been working beautifully with DriveWire 4.33 for over a year in an FD-501 controller on my dual 3 ½” drives. However, with this latest purchase of Coco “stuff”, I received a set of dual 5 ¼” drives. I hooked up the controller with the  HDBDos eprom chip in it, and it worked great UNTIL I tried to access the physical drives. I typed DRIVE OFF (which had been working on this very computer), and all I got was NOTHING. The drive light came on, but that was it. And the disk worked perfectly with another FD-501 controller with original RS-Dos in it.

 

Ideas? What more info do you need to hazard a guess?

 

Thanks


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