My latest big thing:
FUSE filesystems for OS-9 / NitrOS-9 Operating System Level II
It's a multitasking multiuser operating system
for a computer with a Motorola 6809 (or Hitachi 6309)
and at least 128K RAM (better 512K or 2048K).
Requires memory mapping hardware (MMU).
E.G. In a Radio Shack Color Computer 3:
64K logical memory space (seen by the 6809)
= 8 x 8K Blocks
512K physical memory (in my CoCo 3)
= 64 x 8K Blocks
Each user process gets (almost) 64K RAM (often only needs 16K).
The graphics screen gets 64K RAM (often only needs 16K).
The kernel gets 64K RAM. <-- this is a problem, if lots of devices.
I wrote a FUSE File Manager.
FUSE Filesystem:
Implemented by a User Process Daemon (gets 64K).
Used by any other user process (normal file I/O).
Example: TFTP (Trivial File Transer Protocol)
Remote File Reader Filesystem
https://github.com/strickyak/frobio/tree/main/frob2/fuse
