[Coco] Rusty ole FD-501

[univax!gatech!destroyer!trantor!kandur]

Chad,
Tuesday, January 13, 2015, 6:46:25 PM, you wrote:
> What I mean is that I saw on some web links that certain controllers wouldn’t work with high density drives.
> Like here.... http://tinyurl.com/kzog62g

It's not clear, what they mean by hi and low density there.
There is a much better definition here:
Radio Shack 26-3029 CoCo Disk Controller High Density Modifications 
http://www.doki-doki.net/~lamune/computers/coco/hd-floppy/ 
I prefer the definitions as 180k, 360k, 720k, 1,2M, 1.44M 
instead of high, low, double, quad, etc. density.

> It seems to suggest that controllers with the WD1773 chip were not capable of
> supporting it.  I don't know what that means!
> Does I it mean you can't use the HD 3.5" drives at all?  Does it only mean
> you are stuck with low density functionality?
> All I know is my FD-502 controller with HDBDOS EPROM seems to be handling it
> just fine.  But like I said, I haven't tinkered with NitrOS9 using the drive yet.

> -----Original Message-----
> From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of univax!gatech!destroyer!trantor!kandur
> Sent: Tuesday, January 13, 2015 7:50 PM
> To: CoCoList for Color Computer Enthusiasts
> Subject: Re: [Coco] Rusty ole FD-501

> Chad,
> you mention "high density drives" several times.
> What do you mean exactly by that?
> I made a second descriptor for a DS DD 720k 5.25" drive, (with help from Gene
> Heskett and Bill Price) that matches a 3.5" 720k drive. If interested, look
> around here, http://qdv.pw/coco/?s=descriptor 

> Kandur
<trim>