21 Jan
2023
21 Jan
'23
8:52 p.m.
On 2023-01-21 15:39, Fred Cisin via cctalk wrote:
Isn't the biggest problem, that it uses the NEC 765 controller, which
can't read a lot of the WD formatted floppies?
>>>
There is also the SMSC USB97CFDC2 floppy usb controller. Al has the
>>> datasheet archived on bitsavers:
>>>
http://www.bitsavers.org/components/standardMicrosystems/_dataSheets/USB97C…
>> also, I found it here;
>> https://www.mouser.com/datasheet/2/374/97cfdc2_01-198397.pdf
>>> What more could you ask for--legacy floppy interface, external flash
>>> programming...
A possible minor issue, and/or stupid question, . . . looking at the
datasheet, it says that it supports 1Mbps, 500 Kbps, 300Kbps, 250Kbps
data rates.
1Mbps is the never-made-it-to-mainstream "2.8M" drive (and NeXT "4M"
(unformatted))
500 Kbps is "HD" ("1.4M", "1.2M", and 8"DD/MFM)
300 Kbps is a "360K" disk in a "1.2M" drive (compensating for the
360RPM)
250 Kbps is 5.25" DD/MFM (and also 8" FM/SD)
For 5.25" FM/SD, don't you also need a 125 Kbps data rate?
1) SO, does this mean that it can't handle 5.25" single density (TRS80
model 1, early Osborne, and many others)?
2) It mentions Win98/2000 driver and firmware. Is there also newer
driver/firmware support?