Tweak linker script
Fix buffer size and use appropriate function
Output .map file and eliminate eh_frame section
Add task priority
Add sentinel to avoid no task
Show console window and send keyboard input to it
Input lower letters and symbols
Show active and hide inactive cursor
Scroll console when enter key pressed
Stop debug string display
Add `mem` and `cls` command
Remove assembler warning
Create concatenated file
Put root directory info in disk image
Add `dir` command