[Coco] Disk drive question

[Bob Devries]

I had two 80-track drives and one 40 track drive connected to my coco for 
years. That should not prevent OS9 from booting.

I would investigate the drive heads to see if they need cleaning, and also 
check to see if the J&M controller is compatible with OS9 LII. I seem to 
remember reading somewhere that (one version of) the J&M controller was not 
very compatible with the Coco3.

Regards, Bob Devries
27º10'26"S, 151º16'30"E

----- Original Message ----- 
From: "Wayne Campbell" <asa.rand at gmail.com>
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Sent: Thursday, January 19, 2012 4:13 AM
Subject: Re: [Coco] Disk drive question


>> On another note, are there any special jumper settings needed to use a 
>> Coco 5.25 drive on a PC? The 3 drives I have are a 5.25 40trk DS (D0), 
>> 5.25 80trk DS (D2) and 3.5 80trk DS (D1). I do have a couple of old 3.5" 
>> 1.4meg drives that came with PCs. The drive is set for drive 0 on the 
>> Coco.
>
> This may be your problem. As I recall, a 80-track disk only allows you to 
> use 3 drive descriptors. When I had my CoCo3 I had 2 40-trk 5.25s and 1 
> 80-trk 3.5. I'm not certain, but trying to use 2 80-trk drives may be what 
> is causing your problem. Someone who knows more than I can say for sure.
>
> Wayne
>
>
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