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I am having problems finding data on a floppy disk.  According to the inode in the EXT2 file system that i am working with, the data I am looking for is stored block 33H (51 decimal). I am trying to access this data using INT 13 AH=02H, but i am not sure what parameters use.  Can someone please tell me what to enter for the following to get data in block 33H :

  1) cylinder number
  2) head number
  3) sector number

My floppy drive parameters returned by  INT 13 AH=08h are as follows:

  maximum head number = 1
  maximum sector number = 12h (18 decimal)
  maximum cylinder number = 4F (79 decimal)

Any help is greatly appreciated.
Thank You
MWM

Track 0, Head 1, Sector 15d.

Thanks for your help Khumba, could you please tell me how you came up with those numbers, so that i can figure this out for myself in the future.

thank you
MWM

you can probably assume 512-byte sectors for floppy disks

get the block size from the ext2 superblock; probably 1K

assuming 1K blocks and 512-byte sectors, there are 2 sectors per block,
so block 51 = sector 102

convert to LBA: sectors_per_track = 18, heads = 2,
sector = LBA % sectors_per_track + 1 = 13
head = LBA / sectors_per_track % heads = 1
cylinder (track) = LBA / sectors_per_track / heads = 2

Track 2, Head 1, Sector 13? that's my guess, probably wrong

>My floppy drive parameters returned by  INT 13 AH=08h are as follows:

INT 13h AH=08h is useless for floppies. it will ALWAYS say 18 sectors per track, even if there are 19, 20, or 21