After taking a short break for Christmas business, I’ve worked on my little toy operating system for the 8086 again.

It understands the basics of FAT12 now. I’ve actually never sat down before to learn how FAT works. 🤦 Well, better late than never, I guess.

It can’t do subdirectories nor timestamps and I probably won’t implement that. One flat directory is good enough for my purposes and the OS has no notion of time, yet, anyway.

It’s really cool to be able to exchange files with the Linux host or other DOS VMs. 🥳

https://movq.de/v/21e91bafdb/los86-fat12.mp4

@movq@www.uninformativ.de Congratulations! That’s a real milestone.

@movq@www.uninformativ.de That is so cool! 😎 I hope you will consider sharing the source with us at least one day 🤣

@mckinley@mckinley.cc Thanks!

@prologic@twtxt.net I might do it some day. 😅

That FAT12 implementation is very naive and unoptimized. You can see in this video that it takes about 7 seconds to copy a ~10 kB file: https://movq.de/v/fbf2b90ce1/los86-fat12-copy.mp4 🥴 I kind of like that, though, because it feels a little bit like an old machine. 😅🤪

@movq@www.uninformativ.de That sounds really great! :-) Happy hacking!

@movq@www.uninformativ.de Why is the implementation so slow? 🤔