Leaked source code of windows server 2003
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;; Microsoft Confidential; Copyright (C) Microsoft Corporation 1991; All Rights Reserved.;
;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----;; C A V E A T P R O G R A M M E R ;; ;
;** BIOS PARAMETER BLOCK DEFINITION;; The BPB contains information about the disk structure. It dates; back to the earliest FAT systems and so FAT information is; intermingled with physical driver information.;; A boot sector contains a BPB for its device; for other disks; the driver creates a BPB. DOS keeps copies of some of this; information in the DPB.;; The BDS structure contains a BPB within it.;
A_BPB STRUCBPB_BYTESPERSECTOR DW ?BPB_SECTORSPERCLUSTER DB ?BPB_RESERVEDSECTORS DW ?BPB_NUMBEROFFATS DB ?BPB_ROOTENTRIES DW ?BPB_TOTALSECTORS DW ?BPB_MEDIADESCRIPTOR DB ?BPB_SECTORSPERFAT DW ?BPB_SECTORSPERTRACK DW ?BPB_HEADS DW ?BPB_HIDDENSECTORS DW ? DW ?BPB_BIGTOTALSECTORS DW ? DW ? DB 6 DUP(?) ; NOTE: many times these; ; 6 bytes are omitted; ; when BPB manipulations; ; are performed!A_BPB ENDS; ;; C A V E A T P R O G R A M M E R ;;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----;
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