A lot of stuff, all in small format, first mostly compositions/music, very experimental, chipnoise, serial music, integral serialism, using 8-bit chips and common formats (AY,VGM,MOD etc.), later also images and texts. ZX Spectrum 48/128, Sega Master System, Sega Genesis, MSX, Atari (2600, 5200, 8-bit 65 XE), Gameboy (Color and Advance), and NES. All music is composed using algorithmic methods, 'controlled indeterminacy': probability distributions, stochastic processes, nonlinear dynamics, GAT, etc. Mostly pure assemblers: nesasm, xasm, gbasm, tasm; or cross-compilers: gbdk, ccz80, z88dk. No trackers unless I'm able to import in some format, at least these works: Vortex Tracker, Shiru's TF Music Maker, Raster Music Tracker, Beepola (1-bit stuff). Many works are composed and programmed to endless loops, and most of them are completely automatic, containing composing, organizing tracks/channels, generate instruments, mixing, format conversions, uploading files to this site too !