To make use of CallMF in connection with Georg Heßmann's PasTEX drivers ShowDVI and DVIprint and/or the Amiga port of Tomas Rokicki's DVIPS 5.58 by Giuseppe Ghibò, set the environment variable CALLMF to one of
TeXMF:web2c61/rexx/MakeBatch.rexx TeXMF:web2c61/rexx/MakeTeXFont.rexx
The first entry is the preferred choice, it collects all references to missing fonts in a batch file, calling MakeTeXFont.rexx later. The second generates missing fonts `on the fly'. Due to the excessive time consumption of METAFONT it should only be used on really fast machines.