Well I guess the first question you might ask is 'why do you want a floppy drive?'.
A lot of old HP test gear has floppy drives for saving plots, data etc and apart from via GPIB, the only way of getting that data out to print is via the floppy.
So I have one of these: https://www.amazon.co.uk/dp/B0BB5YHT42?ref=ppx_yo2ov_dt_b_fed_asin_title
A rather curious implementation of a 34pin floppy interface to USB. Its far from ideal as:
a) it has a lead with a USB plug on it, which is not what you want for an internal floppy. But you can get internal 9 pin-to-usb adapters, so there is a way of handling that, just not elegantly.
b) it has its own 4 pin power header. This is in addition to the 4 pin header on the floppy. Why both? It won't work without both, sigh.
c) its rather flimsy. The usb lead is tacked onto the pcb with glue. Urgle.
When power to the board AND the usb lead are connected, the PC won't power on. Disconnecting either the usb plug or the board's power connector (not the floppy power) lets the PC boot, but then the floppy doesn't work.
I'm guessing this is because there is a +5v power domain going from the PSU to the floppy, but there is also a different +5v power domain that the usb is connected to on the motherboard. And the PSU doesn't like thrm interconnected and won't power on (note that if you *do* plug the power connector and floppy usb lead in while the PC is powered on, it stays powered on, doesn't trip, and the floppy works. Power off and on again and it won't power up again until you unplug the usb or power connector).
Any ideas how this could be solved? It was not a problem on a Dell PC I also fitted a floppy to, but that had a much simpler power supply. The current one has an EVGA Gold 1000w.
Hope the above explanation is slightly clearer than mud.
A lot of old HP test gear has floppy drives for saving plots, data etc and apart from via GPIB, the only way of getting that data out to print is via the floppy.
So I have one of these: https://www.amazon.co.uk/dp/B0BB5YHT42?ref=ppx_yo2ov_dt_b_fed_asin_title
A rather curious implementation of a 34pin floppy interface to USB. Its far from ideal as:
a) it has a lead with a USB plug on it, which is not what you want for an internal floppy. But you can get internal 9 pin-to-usb adapters, so there is a way of handling that, just not elegantly.
b) it has its own 4 pin power header. This is in addition to the 4 pin header on the floppy. Why both? It won't work without both, sigh.
c) its rather flimsy. The usb lead is tacked onto the pcb with glue. Urgle.
When power to the board AND the usb lead are connected, the PC won't power on. Disconnecting either the usb plug or the board's power connector (not the floppy power) lets the PC boot, but then the floppy doesn't work.
I'm guessing this is because there is a +5v power domain going from the PSU to the floppy, but there is also a different +5v power domain that the usb is connected to on the motherboard. And the PSU doesn't like thrm interconnected and won't power on (note that if you *do* plug the power connector and floppy usb lead in while the PC is powered on, it stays powered on, doesn't trip, and the floppy works. Power off and on again and it won't power up again until you unplug the usb or power connector).
Any ideas how this could be solved? It was not a problem on a Dell PC I also fitted a floppy to, but that had a much simpler power supply. The current one has an EVGA Gold 1000w.
Hope the above explanation is slightly clearer than mud.