'===========================================================================
' Subject: REPORTS DISK INFORMATION          Date: 06-20-95 (00:00)       
' Author:  Dave Navarro, Jr.                 Code: PB                     
' Origin:  Christy Gemmell                 Packet: DISK.ABC
'===========================================================================
' DISKID.BAS    reports disk volume and serial number from boot sector
'
'   Author:     Christy Gemmell (christy.gemmell@almac.co.uk)
'   Date:       12/4/1992
'
' Captured from alt.lang.basic newsgroup on July 20, 1995 and converted
' to PowerBASIC by Dave Navarro, Jr. (dave@powerbasic.com)

    TYPE ParaBlock
        Info  AS INTEGER                ' Call information level
        SerNo AS LONG                   ' Disk serial number
        Label AS STRING * 11            ' Volume label
        FlSys AS STRING * 8             ' File system type
    END TYPE

    INPUT "Which drive - <Enter> for default"; D$

    GetDiskID D$, S$, V$, F$
    PRINT
    PRINT "Disk information for drive "; D$
    PRINT "----------------------------"
    PRINT "Volume label  : "; V$
    PRINT "Serial number : "; S$
    PRINT "File system   : "; F$
END

SUB GetDiskID (Drive$, Serial$, Volume$, FileSys$)
    DIM Para AS ParaBlock               ' Buffer for drive parameter block
    Para.Info = 0                       ' Information level always zero
    REG 1, &H440D                       ' Generic IOCTL device request
    IF Drive$ = "" THEN                 ' If no drive specified
       REG 2, 0                         '    then use default
    ELSE                                ' Otherwise convert
       REG 2, ASC(UCASE$(Drive$)) - 64  ' drive letter to number
    END IF                              '     A: = 1, B: = 2 etc
    REG 3, &H866                        ' Subfunction: get drive ID
    REG 8, VARSEG(Para)                 ' Segment of buffer
    REG 4, VARPTR(para)                 ' Offset of buffer
    CALL INTERRUPT &H21                 ' Invoke DOS
    Serial$ = HEX$(Para.SerNo)          ' Get serial number
    Volume$ = Para.Label                ' Get volume label
    FileSy$ = Para.FlSys                ' Get file system type
END SUB