[Coco] High density drives with the CoCo

[David Ladd]

On Thu, Apr 27, 2017 at 9:56 AM, Mark Marlette <mmarlette at frontiernet.net>
wrote:

> Allen,
>
>
> I have a controller that has been modified as Robert Brose from or local
> user group was the one that created this mod and driver patches. It is a
> monster of a hack. Pretty much like making a controller by hand. I just
> looked at it the other day.
>

​Yes I remember doing this mod to the old 12V controller I have.  It was
for sure a time consuming mod piggy backing all those extra chips and
running the extra wires.​



>
> It does work very well, I even modified the hardware even further to
> automatic sense the floppy type and adjust the data transfer rate.
> To the best of my knowledge, the high density mode of 500Kbps(digging deep
> in to memory on this number)  is only available on the older WD177x, 40 pin
> versions(+12V).
>

​Yes the 3.5" floppy drive was nice to use it's detection pin for the
floppy disk to switch the controllers mode.​

The only down side is you have to make sure the system is in turbo mode to
use this mod.  Otherwise the computer can't keep up lol.

One of the few modded hardware I miss not having actively usable currently.



>
> May be the J&M can do it, that I am not sure of.
>
> Regards,
>
> Mark Marlette
> http://www.cloud9tech.com
> mark at cloud9tech.com
> mark at gamecamaddict.com
>
>
>
> ________________________________
> From: Allen Huffman <alsplace at pobox.com>
> To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
> Sent: Thursday, April 27, 2017 8:29 AM
> Subject: Re: [Coco] High density drives with the CoCo
>
>
>
> On Apr 27, 2017, at 6:37 AM, Francis Swygert <farna at att.net> wrote:
> >
> > Created a new topic for this!  There is a mod to the old 12V disk
> controller that will allow high density drives. Requires a  good bit of
> work, and you need to find a good working old controller. Then you need to
> supply it with 12V. Easiest way is to use a Multi-Pak, but you could hack
> it for a wall-wart (make sure it's well regulated though!) or other
> external power supply. The CoCo1 had 12V on the cartridge port, no others
> did though.
>
> Recently, maybe at the fest, someone told me there was also a mod for the
> later floppy controllers. I'd never heard of this. Anyone know about it?
>
>
> --
> Coco mailing list
> Coco at maltedmedia.com
> https://pairlist5.pair.net/mailman/listinfo/coco
>
> --
> Coco mailing list
> Coco at maltedmedia.com
> https://pairlist5.pair.net/mailman/listinfo/coco
>
​

+-----------------------------------------------------------------------+
| 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?                                          |
+-----------------------------------------------------------------------+


​