Pascal code needed for handling FAT

[RuudB]

I'm writing my own OS in assembler, just for fun: http://www.baltissen.org/newhtm/cbmdos.htm. It has its own file system but to make it more accessible to others I decided to use FAT12, maybe FAT16, as well. I use a stripped MS-DOS floppy and WinImage to copy my files to the disk. But I want to create my own tool and I'm curious if someone else already created a tool and won't mind sharing the code with me.

Many thanks in advance!