UCSD P-System & "compile once, run anywhere"

Hi, A friend was claiming that with the UCSD P-System, one could "compile once" and then "run anywhere" (where "anywhere" means different kinds of computers running the P-System, not different instances of the same computer). Was this true? Did users commonly compile on system A and then take the P-Code to system B and run it successfully? I'd have thought that media incompatibility would have tended to limit this capability. Was any commerical P-System software sold that was a single binary, but the vendor expected the user to be able to install/run it on any brand/model of P-System? (Or, did vendors have to produce a version for every platform?) thanks, Stan Sieler sieler(a)allegro.com Stan Sieler sieler(a)allegro.com www.allegro.com/sieler/wanted/index.html www.allegro.com/sieler