Features that the Espresso kernel currently has.
Might not be up-to-date, though should be.

General:
    Syscalls via int 16 (decimal)
    

Input/Output:
    TTY driver (which works thank goodness)
    Keyboard driver (meager, but usable)
    Very stupid terminal text output drivers (files need renaming, confusing when comparing tty.c to new_tty.c)
    

Filesystems:
    FAT16 (no directory support yet)