Thanks for the awesome repository. I've been able to boot up DOS 1.25 in Virtualbox without any issues. I'm trying to add some more data to the OS, but I'm unable to manipulate the floppy images outside of DOS - How is the .IMG created?
What I'm specifically trying to do is merge in the files found in the MS archive here: https://github.com/microsoft/MS-DOS and create a more complete/official floppy image.
I'm running OSX as my daily driver, but I have Linux and Windows machines at my disposal.
The disk image for 1.25 is a different bird than a normal floppy image and DOS 1.25 won't read images created using HDIUtil (which makes DMG/FLP images).