frotz: frotz (A Portable Z-Machine Interpreter) frotz: frotz: The Z-machine is a virtual machine designed by Infocom to run all of frotz: their text adventures. It went through multiple revisions during the frotz: lifetime of the company, and two further revisions (V7 and V8) were frotz: created by Graham Nelson after the company's demise. The specification frotz: is now quite well documented; this version of Frotz supports version frotz: 1.0. frotz: frotz: frotz: