To run DOOM on your machine, you will need a WAD file. Even though higher levels allow for higher resolution graphics and a larger color palette, this projects generates a stream of level 1 teletext, mainly because it just feels like 'real' teletext to me and I like the original blocky look. Also the whole game menu was rebuilt for rendering in teletext. In detail, the status bar shows information like owned weapons, ammunition, health status, and a graphical representation of the protagonist's face. The packages sent by doom-teletext hold the teletext rendering of the current game frame, as well as a status bar that informs about the current state of the player. However, running the original game on some device that also generates a teletext page which holds the scene is just as fine. Since teletext is based on unidirectional data transmission, it is not possible to actually run DOOM in teletext. If you want to learn more about this technology, the Wikipedia page is a good starting point, for detailed technical documentation this teletext specifications document is the way to go. A teletext page consists of 25 rows that can hold 40 characters each, while some characters are not displayable but hold information like text color of subsequent characters of the same line. Teletext was broadcast for the first time in 1974 and still is in many countries, mainly in Europe. The data to display is contained in the broadcast signal, hidden in the invisible vertical blanking interval area. Tele.what? Teletext is a standard for displaying (simple mosaic) graphics and text on TVs. The generated data can be piped to applications that process teletext packet streams, either to send it to real TVs or to decode and display teletext pages on a computer. Doom-teletext generates a teletext stream that contains rendering of the famous first-person shooter game DOOM from 1993.

M1 teletext