An entry for the Vintage Computing Christmas Challenge 2021 Author: Geir Straume System: Dragon 32 Language: 6809 (vasm assembler) Source code length: 1736 bytes Executable length: 16384 bytes (cartridge) Actual code length: 50 bytes How to run: Install XRoar emulator, start it with argument to load cartridge file: xroar -load xmastree.rom XRoar emulator: https://www.6809.org.uk/xroar/ Useful emulator resources: https://colorcomputerarchive.com/repo/ROMs/ vasm assembler: http://sun.hasenbraten.de/vasm/