• 32-bit DOS/Windows Operating System (FreeDOS/DOS 7.0, Windows 95/98/Me/2000/XP/2003/Vista)
• ~60MB of hard drive space (180KB program, about 60MB of generated files)
  
• 5MB of available RAM

There are no requirements for processor or graphics card; the only thing that slows this program down is how quickly information can be written onto the hard drive, and it has no graphical output.

There are no graphical requirements for this program.  Processor must be compatible with 32-bit applications (64-bit processors may have difficulties if they are not operating in 32-bit mode, but it should still work).  Most likely incompatible with WINE for Linux, but you can try it if you want.  DOSBox might work too, but you'll want to increase clock speed to full.