Somewhat roguelike, but since it was played on a teletype, you have a separate "look around" command that prints out a section of the map (line 06390). The undo

Somewhat roguelike, but since it was played on a teletype, you have a separate "look around" command that prints out a section of the map (line 06390). The undocumented command 10 (line 10730) prints the whole map, and another undocumented command 12 (line 11000) invokes a simple map editor. The dungeon files contain just 25*25 numbers, and looking at line 02370 onwards their meanings are: 0 for empty space, 1 for wall, 2 for trap, 3 for secret door, 4 for door, 5 for monster, 6 for gold, 7 and 8 perhaps mushrooms (they increase your HP or CON by 1, then randomly choose whether to poison you; they are randomly scattered when reading the dungeon file on line 01445 onward).