Twistiminus is a 256 bytes intro, showing a 2 colors twisting bar, in mode 1. This never seen effect on CPC was released during the Pouët's January 2008 "256b Twister frenzy" originated from the C64 scene. No music, no gfxs, but a 50hz animation on the whole height of the screen. The essential part of the intro is an approximative, but extremely short, sin-generator which provides the raw data for the twister graphics generator (based on the Firmware's drawline routine) and animation (achieved with a regular splitscreen of many 1 pixel-line tall screens). Due to the size constraint, the video-hardware banging is rather crude and suffers from a total incompatibility with CRTC type 2 (Motorola).
With the same specifications (256 bytes, fullscreen, 50Hz), Grim experimented a kind of twister shading in mode 2 in Twither (released at FOReVER 2009) which goes technically further than Twistiminus.
