[Coco] 1.2 MB Floppies (again)

Brian Blake random_rodder at yahoo.com
Thu Aug 3 10:54:45 EDT 2006

Thanks for the info!!!

Well, since I have 20 3.5" 1.44mb drives, I guess the best thing is to just use these. 

I'm still trying to get a grasp on the 5 1/4" issue, mainly due to transfering data from the older media to the 3.5" drives, but also, just so I understand;

I have 2 1.2mb drives. So, as long as I copy from the 35/40 track 180/360k drives to the 1.2mb drive and never use those disks in the smaller drives I'm okay. And was I right guessing that I would use ds/dd 360k media in the 1.2mb 5 1/4" drives? Or since these disks would not be used in the other drives does the media matter?

Thanks for all the help so far,


Mike Pepe <lamune at doki-doki.net> wrote: Yes you can use these on a CoCo.

Interchange with 35/40 track drives is an issue, they are not directly 
compatible without tricks. Using them in DECB is possible but again, 
interchange with others is an issue.

Unless you already have a cache of 80 track 5.25" drives, I'd just use 
3.5" drives.


Brian Blake wrote:
> I'm re-learning, so please be patient...
> Okay, so the TEAC FD-55xxx series will work with a Coco, if the mods are made to one (or any other 1.2mb 5.25") to get the speed down to 300rpm, which makes it a 720k drive (using standard 1.2mb media?) and the RDY jumper. Now a few more dumb questions::
> 1. That 720k is only useful under NitrOS9 and not DECB, correct?
> 2. What media should be used (i'm assuming ds/dd 360k) and can the media then be used in a standard coco drive either FD-501 (I know is a ss drive so I'm guessing no) or 502 (should be fine)?
> 3. Or, would it be best to replace my Coco drives with these newer ones or the 1.44mb 3.5" (I know, used as a 720k) and use those as my drives?
> I'm sorry to be asking questions I know have been asked in the past, but, looking over the discussions recently and my own Google research, I have confused myself. Maybe once I get a grasp on this, I'll create a tutorial for those like me who have spent entirely too much time in the World if Windows machines...
> Brian
> Mike Pepe  wrote: The notes there are pretty good. I can personally testify that the TEAC 
> drives mentioned on that page can indeed be used on a CoCo as 720k 
> disks. In fact I have two of them in a FD-500 case in storage somewhere.
> -Mike
> Brian Blake wrote:
>> Doing research looking for info on 1.2MB floppies has netted some results. Maybe you all have seen this website already, so if I am repeating, I'm sorry. This site:
>>   http://www.oldskool.org/disk2fdi/525HDMOD.htm
>>   Has info on 300/360rpm speed changes on the TEAC FD-55 series of drives and also discusses mods to others to make them run at the 300rpm speed.
>>   Don't know if this is of any use to Coco users, but, I hope so...
>> ---------------------------------
>> How low will we go? Check out Yahoo! Messenger’s low  PC-to-Phone call rates.

Coco mailing list
Coco at maltedmedia.com

Do you Yahoo!?
 Next-gen email? Have it all with the  all-new Yahoo! Mail Beta.

More information about the Coco mailing list