This looks like a 25 pin Sub-D, and not the 37pin Sub-D that was used for authentic IBMs below...

https://www.minuszerodegrees.net/5150_5160/ca … #floppy_adapter

https://www.minuszerodegrees.net/5150_5160/ex … kette_drive.htm

Your best bet may be a custom breakout of this port on a multio pigtail slotcover, connected to the PC's 5v GND, 5v rail, and FDC cable header...

However, I am not convinced that all the needed schugart interface lines can fit on that port that way.

That's the same connector as the IBM external floppy drive enclosure I think. It's a straight line-to-pin connection.. so you'll need two things:
* An extension cable to connect to the enclosure's back.
* A floppy cable with one end that connects to the floppy controller (mobo or IO card) and the other end you crimp the matching port connector to the extension cable above. Just be careful to make sure the whole setup is properly transferring all the lines without mixup or a shift.

I believe someone here on Vogons already listed the parts needed for this little project.

wbahnassi wrote on 2025-07-22, 19:52:

That's the same connector as the IBM external floppy drive enclosure I think. It's a straight line-to-pin connection.. so you'll need two things:

It absolutely is not. The pictured item is DB-25, IBM used DC-37

Vaylo wrote on 2025-07-22, 12:48:

Hi folks, […]
Show full quote

Hi folks,

just recently i purchased a 5.25 floppy drive with external enclosure - see pictures for model numbers. I'm wondering if anyone has a clue which (probably ISA) card this was connected to. Connector is parallel-like 25pin but obviously must be also suppyling 5 and 12V which normal parallel port does not (or does it?).

Thanks for any hints.

Could it be an external floppy drive for an amiga ?

Might be for an early portable or clamshell laptop like the Sharp PC-4600, XT to 286 class alternate models, early Toshibas, something like that.

If the hookups seem the same as this, then it's for a Sharp.. https://blog.hardtechnology.net/post/sharppc4641-extfdd/

[/quote]

Could it be an external floppy drive for an amiga ?
[/quote]

I guess it actually could . This one is being sold as "for Amiga". I see some similarities there with my 5.25 FDD:

Vaylo wrote on 2025-08-03, 19:05:

I guess it actually could . This one is being sold as "for Amiga". I see some similarities there with my 5.25 FDD: […]
Show full quote

weedeewee wrote on 2025-07-22, 22:07:

Vaylo wrote on 2025-07-22, 12:48:

Hi folks, […]
Show full quote

Hi folks,

just recently i purchased a 5.25 floppy drive with external enclosure - see pictures for model numbers. I'm wondering if anyone has a clue which (probably ISA) card this was connected to. Connector is parallel-like 25pin but obviously must be also suppyling 5 and 12V which normal parallel port does not (or does it?).

Thanks for any hints.

Could it be an external floppy drive for an amiga ?

I guess it actually could . This one is being sold as "for Amiga". I see some similarities there with my 5.25 FDD:

Figuring out the pinout will give you more insights.

edit: fixed the quoted comment.
edit2: added the following link https://allpinouts.org/pinouts/connectors/dat … rnal-diskdrive/

weedeewee wrote on 2025-08-03, 19:15:

Figuring out the pinout will give you more insights. […]
Show full quote

Vaylo wrote on 2025-08-03, 19:05:

I guess it actually could . This one is being sold as "for Amiga". I see some similarities there with my 5.25 FDD: […]
Show full quote

weedeewee wrote on 2025-07-22, 22:07:

Could it be an external floppy drive for an amiga ?

I guess it actually could . This one is being sold as "for Amiga". I see some similarities there with my 5.25 FDD:

Figuring out the pinout will give you more insights.

edit: fixed the quoted comment.
edit2: added the following link https://allpinouts.org/pinouts/connectors/dat … rnal-diskdrive/

Amiga had 23pins? Then it's not for Amiga as mine has 25 pins.

Vaylo wrote on 2025-08-03, 19:29:

weedeewee wrote on 2025-08-03, 19:15:

Figuring out the pinout will give you more insights. […]
Show full quote

Vaylo wrote on 2025-08-03, 19:05:

I guess it actually could . This one is being sold as "for Amiga". I see some similarities there with my 5.25 FDD: […]
Show full quote

I guess it actually could . This one is being sold as "for Amiga". I see some similarities there with my 5.25 FDD:

Figuring out the pinout will give you more insights.

edit: fixed the quoted comment.
edit2: added the following link https://allpinouts.org/pinouts/connectors/dat … rnal-diskdrive/

Amiga had 23pins? Then it's not for Amiga as mine has 25 pins.

Still, measuring the pinout of your external enclosure is the way forward.

I agree. Measuring the pinout, then making an internal connection with a terminal breakout, and a slot cover bracket, is the most sensible way forward with this enclosure.

You'd need another 34 pin male IDC breakout to connect to a floppy ribbon cable, in place of a diskette drive.

Example terminal breakout
https://www.amazon.com/Connector-D-sub-25-pin … t/dp/B073RG3GG6

DB25 slot brackets that you could mount it to.
https://www.amazon.com/Pc-Accessories-Stainle … n/dp/B00CBAHRYO

Example 34 pin IDC breakout.
https://www.amazon.com/Sysly-Breakout-Termina … g/dp/B074THBZG5

For FULL clarity:

The IDC breakout goes on the floppy ribbon cable's female IDC34 connector. Using it, you route suitable wires to the DB25 breakout you have hanging off the slot cover. You would attach appropriate Molex power lead on the DB25 breakout, at the pin locations you trace out with your multimeter.

Once this is all said and done, this is functionally the same as plugging the diskette into the internal floppy ribbon cable.

weedeewee wrote on 2025-07-22, 22:07:

Could it be an external floppy drive for an amiga ?

What's the drive model?
If it's D509, then it's 1.2 MB - definitely not for Amiga, as Amiga never had a High Density FDC.

Grzyb wrote on 2025-08-04, 04:02:

weedeewee wrote on 2025-07-22, 22:07:

Could it be an external floppy drive for an amiga ?

What's the drive model?
If it's D509, then it's 1.2 MB - definitely not for Amiga, as Amiga never had a High Density FDC.

It is D509v2 and I'm using HD floppies with it.