LASTDRIVE

Purpose:    Sets the maximum number of accessible logical drives.

Syntax:     LASTDRIVE = ll
            Where, ll ranges from 'A' to 'Z'

By default: LASTDRIVE = max('E', last installed drive)

Note:
     The ll value defines the last valid logical drive that the system may
access. The maximum value is derived when booting.  The command is useful
with a network environment because, new drives may appear in the process of
work. Additional drives are also required for the SUBST external DOS
command, allowing different logical drives to be used for access to parts of
the physical drive.

     Notice that the system allocates memory for each logical drive, so only
the necessary maximum value should be speciifed.