That is great ! I tried doing that with one of the disk sets there but it would not boot when converted to 1.44 (maybe they never did but the one I pointed to did).
Might have to try Winimage 8.1 but have a license for 7 so I just keep using it ;p

Horun wrote on 2022-02-07, 04:31:

That is great ! I tried doing that with one of the disk sets there but it would not boot when converted to 1.44 (maybe they never did but the one I pointed to did).
Might have to try Winimage 8.1 but have a license for 7 so I just keep using it ;p

Well, DR DOS has a different bootloader code compared to a MS DOS bootsector.
Basically DR DOS loads IBMBIO.COM instead of IO.SYS

Hm. I wonder where all this trouble comes from.
Normally, an 1,44MB floppy is fully compatible with 720KB formatting.
If its corner hole is covered and if it is being used in a 1,44MB HD drive, I mean.
On the software-side, it will act pretty much like a real 720KB medium then.

In fact, likewise 360KB is a valid format, too.
It's possible to format an 3,5" 720KB or 3,5"1,44MB floppy like an 5,25" 360KB floppy.

That method was used when making 1:1 working copies of 5,25" diskettes at some point (before HD floppies were common).

For example, if PC A had a 5,25" floppy drive, but PC B had one of these new 3,5" floppy drives.

I think the first set I tried did not boot because the original image was incorrect, much like EvieSigma's disk in the very first post.
yes have taken 720k to 1.44mb and 360k to 1.2mb many times but that was from known good bootable disks.
If you look down the list on Winworld you will see how few times those DR Dos5 disks were downloaded, some just once so who knows if they all are truly bootable.