johnd@pedsgo.UUCP (07/08/87)
I am posting this for a friend,
please respond via mail to HIM, TNX ... johnd/KA2QHD
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I am looking for any information on the PHYSICAL TRACK formats of IBM
floppy disks, 5.25 " and 3.5 "
I define Physical Format to the the BIT sequences between sectors including
sector/track ID, CRC's and flags.
This is the format that the disk controller puts on the disk, NOT the way
PC/MS-DOS organizes the file system on the disk.
PLEASE RESPOND TO ME VIA MAIL SINCE I DO NOT HAVE DIRECT ACCESS
TO THE NET.
Tom Moulton, W2VY
...!bellcore!hotps!tsdiag!tomm
or !vax135!hotps!tsdiag!tomm
or !ihnp4!hotps!tsdiag!tomm
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MAIL: J.Decatur,CONCURRENT Computer Corp. 40 Pine st. Neptune NJ 07753
PHONE: 201-493-4880 TWX: 710-722-6502 FAX: 201-493-9167 FM: 145.11 RPT
UUCP: {ucbvax,decvax,ihnp4}!vax135!petsd!pedsga!johnd -- KA2QHD --
PACKET GATEWAY:.................. !mtunh!ky2d-2!ka2qhd CW: 21.150 Mhz dg@wrs.UUCP (David Goodenough) (07/18/87)
I've been thrown in the deep end a bit: I need to write a driver in C that
will access MS-DOS V3.0 (360K) disks: reading, writing, subdirectories, the
whole enchilada. I would be most grateful if someone could email me any
information on how they work, (i.e. where the FAT's live, what is the
structure of directories, what does a directory entry look like, how
are subdirectories handled etc. etc. etc. etc. Work on the assumption
that I know what tracks, sectors, heads, etc. are, but have absolutely
NO knowledge of what stuff MS-DOS itself is writing on the disk in the
way of file structure. (I just know about FAT's because I heard someone
mention them, I'm not sure what they are, but they seem to be important.
Thanks in advance for your help,
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dg@wrs.UUCP - David Goodenough
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+---+unicorn@pnet01.CTS.COM (Rich Herzog) (07/19/87)
You MUST go get a copy of Ray Duncan's 'Advanced MS-DOS.' It is reasonably priced, clear, complete, accurate, and about 30 times too big to post here.
brown@nicmad.UUCP (Mr. Video) (07/19/87)
In article <256@wrs.UUCP> dg@wrs.UUCP (David Goodenough) writes:
<I've been thrown in the deep end a bit: I need to write a driver in C that
<will access MS-DOS V3.0 (360K) disks: reading, writing, subdirectories, the
<whole enchilada. I would be most grateful if someone could email me any
<information on how they work, ....
Your best source (ok, one of the better) is to go to your local IBM PC
dealer and purchase a copy of the PC-DOS 3.30 Technical Reference Manual.
It contains what you need to know for all the MS-DOS versions.
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harvard-\ ihnp4--\
Mr. Video seismo!uwvax.......!nicmad!brown
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terminus-/