I have a similar setup, except I used Win95 OSR2 and Dos 7.1 for the FAT32 support. I wound up using PLOP boot manager to dual boot into either, and it worked great. It's a little byzantine to get going, but I highly recommend it. I'd give you tips on how I set it up, but honestly I don't remember. I think I used diskpart on my Win10 machine to create the initial partitions, and then configured the boot settings and installed the OSes under PLOP.