= Data file formats =

Common files:
 * `.spe`: SPEC files for data, mostly sprites and palettes, but also levels
 * `.wav`: sound FX files
 * `.hmi`: music files
 * `.lsp`: Lisp files

Other files in data packages:
 * `.cpf`: SPEC files containing cache profile information
 * `satan.bak`: appears to be a backup `.spe` file from Satan Paint
 * `demo1.dat`: appears to be a demo control sequence
 * `micron.vcd`: appears to be an empty SPEC file with copyright information
 * `example.lvl`: SPEC file?
 * `normal.txt`: probably unused