I'm working on a PC-based external 8" floppy drive, mostly to be able
to format the 30-40 pounds of perforated placemats (aka bulk-erased RX02
disks) in my garage, and to be able to archive the few PDP-8 and Xerox
systems disks, games disks, diags and source disks I have, but don't
have the equipment to run. I've discussed this in pieces here, but I'm
ready to try to actually put it all together.
The first order of business is an interface cable for a standard ISA
floppy/IDE controller. I've found this pinout:
http://tinyurl.com/5c5fb
but no confirmation that it actually worked with a YD-180 drive,
which is what I have available.
Second issue is powering the drive. YE Data's schematics say +24VDC,
max 1.0A, typical 0.4A, and 5VDC, max 1.0A and typical 0.4A. However,
I've also found Usenet posts claiming a peak draw of 24VDC_at_2.2A and
5VDC_at_1.7A, so I'm inclined to be generous. I'm also not at all versed
in electronics, so I'm not sure what to look for past those specs.
Jameco has these units:
http://tinyurl.com/3lpjc
PWR SPLY,SWITCH(D-60B)58W, 5V_at_3A,24V_at_1.8A,UL/TUV/CE
Jameco #123465
http://tinyurl.com/4whtu
PWR SPLY,SWITCH,45W,5VDC_at_5A, 24VDC_at_1.8A,PFC,UL/CSA/CE/TUV
Jameco #194870
http://tinyurl.com/6fpp9
PWR SPLY,SWITCH,65W,5VDC_at_6A 24VDC_at_2.6A,PFC,UL/CSA/CE/TUV
Jameco #194896
http://tinyurl.com/64rml
PWR SUPPLY,SW,65W,5V/7A, 12V/3.2A,2.4V/1.5A,MIN,LOADREQ
Jameco #215706
Which is most suitable for an external floppy enclosure? If "none of
the above", what am I missing?
At the risk of heresy, right now I don't have time to be educated in
the issues; just point me in the right direction and shove, please. :)
BTW, I'll be more than glad to list and share the software I have.
After it's archived, I'll be looking to give away the disks I can't use,
or trade them for blanks.
Thanks,
Doc
Received on Tue Jul 27 2004 - 14:34:23 BST