The operating systems supported in the current version of ispVM are listed in ispVM System Help Procedures > Using ispVM Utilities > Installing/Uninstalling Parallel Port Driver and USB Driver
ispVM version 17.9.1 officially supports the following operating systems:
Windows: Windows 7, Vista 32-bit, Windows XP, Windows 2000
Linux: Red Hat Enterprise V3 and V4
UNIX: Solaris 2.8