[Coco] 8" Disks and NitroOS9

[Mark Marlette]

That is the one I used in the mod installed. An improved 1793. Came from our club president Robert Brose, he created this monster!
Was 20yrs ago I did this... memory running a bit short. I still have the controller and HD drive, autoswitches the data transfer rate based upon the optical sensor in the drive.
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 6:10 PM
 Subject: Re: [Coco] 8" Disks and NitroOS9
   
Just out of curiosity, what about the Fujitsu MB8877?  One of my

controllers has that chip and that is equivalent to the WD1793.


bill


On 03/16/2018 03:30 PM, Mark Marlette wrote:
> 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                     |
>> | YouTube Gaming Live: https://gaming.youtube.com/user/PacoOtaktay/live |
>> | Websites: http://dwladd.com     &    http://www.theterrorzone.com   |
>> | G+:  https://plus.google.com/113262444659438038657                   |
>> | 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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