
W83977EF/ CTF
PRELIMINARY
Publication Release Date: March 1999
-26 -
Revision A1
(4) Read ID
PHASE
Command
R/W
W
W
D7 D6 D5 D4 D3 D2 D1 D0
0 MFM 0 0 1 0 1 0
0 0 0 0 0 HDS DS1 DS0
REMARKS
Command codes
Execution
The first correct ID
information on the cylinder
is stored in Data Register
Status information after
command execution
Result
R
R
R
R
R
R
R
-------------------- ST0 -----------------------
-------------------- ST1 -----------------------
-------------------- ST2 -----------------------
---------------------- C ------------------------
---------------------- H ------------------------
---------------------- R ------------------------
---------------------- N ------------------------
Disk status after the
command has been
completed
(5) Verify
PHASE
Command
R/W
W
W
W
W
W
W
W
W
D7 D6 D5 D4 D3 D2 D1 D0
MT MFM SK 1 0 1 1 0
EC 0 0 0 0 HDS DS1 DS0
---------------------- C ------------------------
---------------------- H ------------------------
---------------------- R ------------------------
---------------------- N ------------------------
-------------------- EOT -----------------------
-------------------- GPL -----------------------
-------------------- DTL/SC -------------------
REMARKS
Command codes
Sector ID information prior
to command execution
Execution
No data transfer takes
place
Status information after
command execution
Result
R
R
R
R
R
R
R
-------------------- ST0 -----------------------
-------------------- ST1 -----------------------
-------------------- ST2 -----------------------
---------------------- C ------------------------
---------------------- H ------------------------
---------------------- R ------------------------
---------------------- N ------------------------
Sector ID information after
command execution