Selection of Level I sources

Source: Microware's OS9_6X09 Archive or in some cases the files have been disassembled. The files have been sent through a pretty-print filter.

• ACIA module for Motorola 6850
• ACIA module for Rockwell 6551
• Boot module for DC3 floppy disk drive
• Boot module for Dragon 64 floppy disk drive
• Clock module
• OS-9 Level I V1.2 kernal, part 1
• OS-9 Level I V1.2 kernal, part 2
• SysGo module