Introduction        Introduction to system functions
 BOOTCOLD()          Restart system from cold
 BOOTWARM()          Restart system without RAM test
 DOSPARAM()          Return DOS parameters
 ERRORACT()          Return error information
 ERRORBASE()         Determine fault cause
 ERRORCODE()         Examine error code
 ERRORORG()          Examine error origin
 EXENAME()           Check program name
 GETCOUNTRY()        Return DOS country code
 ISAT()              Establish whether computer is an AT
 ISMATH()            Establish co-processor installation
 OSVER()             Determine operating system version
 SSETBREAK()         Test BREAK
 SSETVERIFY()        Determine VERIFY setting