[Coco] Floppy hardware...

[Christopher Barnett Fox]

The jumpers on the TEAC 55-GFR allow for 300RPM operation, and the drive
will format disks, but it can't read older disks I've got that were
formatted and written with a true 360K drive. This seems to be a known
issue with these 1.2MB 5.25" drives, and I understand the general
recommendation is to avoid them. I'm tending to agree.

-- 
Christopher Fox





On 20140115, 9:11, "billg999 at cs.uofs.edu" <billg999 at cs.uofs.edu> wrote:

>> Good evening!
>>
>> I'm having a devil of a time building a complete 2xDSDD 5.25" floppy
>> system for my CoCo 3. I've got a complete one-drive FD-502, and a
>>complete
>> one-drive FD-500 (with the 26-3029 controller).
>>
>> The FD-500, I discovered, only has a TEC FB-501 180K SSDD drive.
>> The FD-502, while it has a Mitsumi D502 360K drive, has unusual power
>> connectors ­ not the standard 4-pin Molex, and it doesn't match the
>>4-pin
>> mini-Molex found on 3.5" drives. The two-drive-bay enclosure has support
>> for a second drive, but the included power connector is the same odd
>>4-pin
>> that doesn't match a mini-Molex.
>>
>> I bought a Chinon FZ-502 off Fleabay, which should be a 360K drive. It's
>> got a standard large 4-pin Molex power connector.
>>
>> Is the pinout on the power connectors in the FD-500 and the FD-502 the
>> same? Could I install the Chinon into the FD-502 case by cutting out the
>> odd power connector and splicing in a spare 4-pin Molex?
>>
>> Don't even start me on the fun I had mistakenly buying what was labeled
>>as
>> a 360K TEAC drive on Fleabay and discovering what arrived was actually a
>> 1.2MB TEAC-55GFR.
>>
>
>Should be able to jumper that for 360K.  GFR's are very flexible.
>
>bill
>
>
>
>
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