Design FDISK and FORMAT for CF card ?

If my CF card is 256MB

and CIS(Identify_Device_Information) are

Cylinder=03D4h(980)

Head=10h(16)

Sector_per_track=20h(32)

Capacity=07A800h(501760)

And I want to design can be auto FDISK create a FAT32 partition(MAX Capacity)

~MBR~

BootIndicator:80

StartHead:01

StartSectorCylinder:0100

SystemID:0C or OB

EndHead:??

EndSectCylinder:????

AbsoluteFirstSect:????????(3F or 20?)

Nbsect:????????

~BootSector~

BS_jmpBoot:EB3C90

BS_OEMName:MSDOS5.0

BPB_BytsPerSec:0002(512byte)

BPB_SecPerClus:??(1~128)

BPB_RsvdSecCnt:2000(32)

BPB_NumFATs:02

BPB_RootEntCnt:0000

BPB_TotSec16:0000

BPB_Media:F8

BPB_FATSz16:0000

BPB_SecPerTrk:3F00

BPB_NumHeads:FF00

BPB_HiddSec:20000000

BPB_TotSec32:=MBR.Nbsect

BPB_FATSz32:????????

BPB_ExtFlags:0000

BPB_FSVer:0000

BPB_RootClus:02000000

BPB_FSInfo:0100

BPB_BkBootSec:0600

BPB_Reserved:000000000000000000000000

BS_DrvNum:80

BS_Reserved1:00

BS_BootSig:29

BS_VolID:????????

BS_VolLab:NO NAME

BS_FilSysType:FAT32

How can I computer number of field of ????