Electric Force by Frog //ROi
233 bytes intro for Vectrex computer
Released at Chaos Constructions'2015
I strongly recommend to run it only on real hardware (Vectrex). It runs under emulator (ParaJVE), but looks incorrect. ParaJVE has problems with code which change DAC while integrating (and some other specific features). I'm sure it works correctly at least on my own Vectrex :-)
AS09 Assembler for M6809 v1.41/Win by Frank A. Kingswood was used
If you don't have Vectrex, check out Youtube video: http://www.youtube.com/watch?v=lPZPBwaWRuk
Emulators - invaluable tool for development (thank you, Franck Chevassu!) but quite bad for everything else.