I have a generic 5.25” (not sure of brand) in my dell GX1 but it writes plain SSDD floppies in RX50 format no problem.
The RX33 was a pretty standard PC floppy drive AFAIK, just configured (with jumpers) to work as an RX33. You may find better milage configuring it as a PC floppy drive, as PUTR expects to work on PC drives at the device level. Having a real RX33 might be throwing it off. Don’t take it as gospel, since i’ve not got an RX33 to test it with. Not sure if PUTR can copy images to a floppy, as i’ve only used it to build a bootable RT11 disk, and make a few RT11 disks out of the contents of images mounted by PUTR. You might find it better to work on a blank formatted floppy and build up from there. > On Feb 22, 2022, at 4:20 PM, Rod Smallwood via cctalk <cctalk@classiccmp.org> > wrote: > > Hi All > > I did find some RX50 images of the MicroRSX distribution. > > So I fired up my DEC Celebris FX. It runs W95 and has a 3.5 inch floppy, > a real RX33 5.25 inch drive and a CD-R. > > Its accessible on my network so getting files onto it is not a problem. > > So install putR.com , and transfer the image files. > > Huh! putR says the RX50 disk is write protected. Its not and the drive > works normally with the disk from the MS DOS prompt. > > So much for putR writes RX50's on RX33! > > Rod > >