*************************************************************
*                                                           *
*  DIRECTORY BUFFER CONTROL BLOCK                           *
*                                                           *
*************************************************************

DIRBCB: DB      0FFH            ;DRV  DRIVE NUMBER
        DB      00,00,00        ;REC# RECORD POSITION IN
                                ;  BUFFER
        DB      00              ;WFLG BUFFER WRITTEN FLAG
        DB      00              ;00 BIOS SCRATCH FLAG
        DW      0000            ;TRACK BUFFER CONTENTS'
                                ;  PHYSICAL TRACK
        DW      0000            ;SECTOR BUFFER CONTENTS'
                                ;  PHYSICAL SECTOR
        DW      DIRBUF          ;BUFFAD BUFFER ADDRESS