View Full Version : 5.25" WP light/sensor/notch

May 6th, 2008, 09:36 PM
I have an opportunity to buy a huge stash of NOS 5.25" DS/DD floppies, cheap, but notchless.

Short of punching them all, can a simple mod be done to a FDD to basically lock the sensor as always not-WP?

What would I do? Bridge across the photosensor side?

If so, I would just put a switch there, like I did my Teac Fd-55GFR for the 300rpm+DS/QD switch....

FYI, I would use this in my CP/M disk imaging system, not a running system. It would basically be to master floppies from images.


nige the hippy
May 7th, 2008, 01:45 AM
I would imagine that just bridging the phototransistor would do it, if you want to be super-safe, bridge it with an (about) 220 ohm resistor, in case it's got a funny drive circuit. use a switch by all means, but probably not needed if you're sensible.