An XMS driver is installed by including a DEVICE= statement in the machine's CONFIG.SYS file.It must be installed prior to any other devices or TSRs which use it. An optional parameter after the driver's name (suggested name "/HMAMIN=") indicates the minimum amount of space in the HMA a program can use. Programs which use less than the minimum will not be placed in the HMA. A second optional parameter (suggested name "/NUMHANDLES=") allows users to specify the maximum number of extended memory blocks which may be allocated at any time.