[Coco] 8" Disks and NitroOS9

[Mark Marlette]

Bill,
A 8" disk had a transfer rate of 500Kbs, going from memory here but there was no standard CoCo disk controller that did that data rate.
You could hack the old 3029(??), I did one here but was like building a new card.
The data transfer rate is the same as what was used in the small 3.5" disk, so the CoCo could do HD transfers.
Regards, Mark Marlette
 http://www.cloud9tech.com
mark at cloud9tech.com
mark at gamecamaddict.com

      From: Bill Gunshannon <bill.gunshannon at hotmail.com>
 To: "coco at maltedmedia.com" <coco at maltedmedia.com> 
 Sent: Friday, March 16, 2018 2:19 PM
 Subject: Re: [Coco] 8" Disks and NitroOS9
   

That one was easy.  I was much more concerned about the ones like:

typ, dns, wpc and rwc.


bill


On 03/16/2018 02:05 PM, David Ladd wrote:
> Bill,
>
> for 77 tracks should be:
>
> dmode /d1 cyl=4D
>
> replace /d1 with the drive descriptor you have the 8" drive configured for.
>
> +-----------------------------------------------------------------------+
> | David Ladd a.k.a. PacoOtaktay a.k.a. Drencor                          |
> | YouTube: http://www.youtube.com/user/PacoOtaktay                     |
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> | G+:  https://plus.google.com/+DavidLaddPacoOtaktay                   |
> |                                                                      |
> | Do you have your CoCo 3 yet?                                          |
> +-----------------------------------------------------------------------+
>
>
> On Fri, Mar 16, 2018 at 12:55 PM, Bill Gunshannon <
> bill.gunshannon at hotmail.com> wrote:
>
>> First, thanks everyone for the help with cases.  I got one for
>>
>> my COCOSDC and one for a Glenside IDE (I'll need more of
>>
>> them eventually and probably the SDC Case as well as I hope
>>
>> to get a couple more SDC's too).
>>
>>
>> Now my next project.  Has anyone here used 8" disks with
>>
>> NitrOS9?  I have an Tandon 8" hooked up to my COCO3 using
>>
>> the Floppy Adapter from Dbit.com (John does great work, the
>>
>> power board for the Tandon is also one of his projects.)  I was
>>
>> able to DSKINI a disk and write and read back a BASIC program
>>
>> with it.  But that was just as a default COCO floppy.  Now I want
>>
>> to get it working as a true 8" disk with access to all 77 tracks.
>>
>> Anybody tried this?  My first attempt to format a disk using the
>>
>> default DMODE which would be the same as under ECB failed.
>>
>> Does anyone have DMODE parameters that are known to work
>>
>> with real 8" disks?
>>
>>
>> bill
>>
>>
>>
>> --
>> Coco mailing list
>> Coco at maltedmedia.com
>> https://pairlist5.pair.net/mailman/listinfo/coco
>>


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