_BPB_FAT12 Structure

Microchip MDD File System Interface

MDDFS Interface Library Help
_BPB_FAT12 Structure
C
typedef struct {
  SWORD BootSec_JumpCmd;
  BYTE BootSec_OEMName[8];
  WORD BootSec_BPS;
  BYTE BootSec_SPC;
  WORD BootSec_ResrvSec;
  BYTE BootSec_FATCount;
  WORD BootSec_RootDirEnts;
  WORD BootSec_TotSec16;
  BYTE BootSec_MDesc;
  WORD BootSec_SPF;
  WORD BootSec_SPT;
  WORD BootSec_HeadCnt;
  DWORD BootSec_HiddenSecCnt;
  DWORD BootSec_Reserved;
  BYTE BootSec_DriveNum;
  BYTE BootSec_Reserved2;
  BYTE BootSec_BootSig;
  BYTE BootSec_VolID[4];
  BYTE BootSec_VolLabel[11];
  BYTE BootSec_FSType[8];
} _BPB_FAT12;
Description

The _BPB_FAT12 structure provides a layout of the "bios parameter block" in the boot sector of a FAT12 partition.

Members
Members 
Description 
SWORD BootSec_JumpCmd; 
Jump Command 
BYTE BootSec_OEMName[8]; 
OEM name 
WORD BootSec_BPS; 
Number of bytes per sector 
BYTE BootSec_SPC; 
Number of sectors per cluster 
WORD BootSec_ResrvSec; 
Number of reserved sectors at the beginning of the partition 
BYTE BootSec_FATCount; 
Number of FATs on the partition 
WORD BootSec_RootDirEnts; 
Number of root directory entries 
WORD BootSec_TotSec16; 
Total number of sectors 
BYTE BootSec_MDesc; 
Media descriptor 
WORD BootSec_SPF; 
Number of sectors per FAT 
WORD BootSec_SPT; 
Number of sectors per track 
WORD BootSec_HeadCnt; 
Number of heads 
DWORD BootSec_HiddenSecCnt; 
Number of hidden sectors 
DWORD BootSec_Reserved; 
Reserved space 
BYTE BootSec_DriveNum; 
Drive number 
BYTE BootSec_Reserved2; 
Reserved space 
BYTE BootSec_BootSig; 
Boot signature - equal to 0x29 
BYTE BootSec_VolID[4]; 
Volume ID 
BYTE BootSec_VolLabel[11]; 
Volume Label 
BYTE BootSec_FSType[8]; 
File system type in ASCII. Not used for determination 
Microchip MDD File System Interface 1.2.0 - [Aug 18, 2008]
Copyright © 2008 Microchip Technology, Inc.  All rights reserved.