[Coco] Reading/Writing Model I/III/4 Disks on a CoCo

Brendan Donahe brendan at polylith.com
Thu Sep 5 09:44:18 EDT 2013


I second ImageDisk.  I made my Model III, Model 4, and Model 4P floppies
using a 386 (AST Premium II) and a 360k floppy drive.  The stock floppy
controller in the AST was compatible with ImageDisk.

Brendan


On Thu, Sep 5, 2013 at 8:41 AM, Al Hartman <alhartman6 at optonline.net> wrote:

> That's not a problem unless you are trying to write single density Model I
> disks. And, if you have Super Utility for the Model I you can re-write the
> Data Address Marks to make them correct.
>
> Most Coco Disk Controllers I know of use a disk controller chip compatible
> with the Model III/4.
>
> I would check Craigslist, or a local recycler for an old XT class computer
> to use to make the disks on. I have one here I am building an 8-bit IDE
> Controller for to use a CF Card as a hard drive. (
> http://www.lo-tech.co.uk/**wiki/Lo-tech_ISA_CompactFlash_**
> Adapter_revision_2<http://www.lo-tech.co.uk/wiki/Lo-tech_ISA_CompactFlash_Adapter_revision_2>
> )
>
> The other problem with using a Coco to make disk images, is that few
> people have hard drives for them to host the images on. I guess one could
> use Drivewire for that purpose. But, again, there's no software to write
> the image out.
>
> If one has a PC with a 360k drive (you can add one to most machines up to
> Windows 98), Dave Dunfield's Imagedisk will allow you to image disks or
> create disks from images. He has some Model 4 disks available on his page. (
> http://www.classiccmp.org/**dunfield/img/index.htm<http://www.classiccmp.org/dunfield/img/index.htm>
> )
>
> Some of the TRS-80 Emulators on the PC also come with utilities to image,
> or write disks as well.
>
> - Al -
>
> -----Original Message----- From: goosey
>
>
> I think the CoCo's floppy controller could do it, but as far as I know
> nobody's written the code. Far worse than the 35/40 track issue is the fact
> that TRSDOS and cousins screw around with the inter-sector markings. I'm
> not entirely sure about the details.
>
> Willard
> Sent from Samsung tablet
>
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