INT 21 - Novell NetWare - WORKSTATION - GET NUMBER OF LOCAL DRIVES
AH = DBh
Return: AL = number of local disks as set by LASTDRIVE in CONFIG.SYS
Note:   this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
Alloy NTNX

See also: 210E

21DB - Novell NetWare - WORKSTATION - GET NUMBER OF LOCAL DRIVES