(3) Read A Track
PHASE R/W
Command
W
W
W
W
D7 D6 D5 D4 D3 D2 D1 D0
0 MFM 0 0 0 0 1 0
00
0 0 0 HDS DS1 DS0
---------------------- C ------------------------
---------------------- H ------------------------
W
W
W
W
W
Execution
---------------------- R ------------------------
---------------------- N ------------------------
-------------------- EOT -----------------------
-------------------- GPL -----------------------
-------------------- DTL -----------------------
Result
R
R
R
R
R
R
R
-------------------- ST0 -----------------------
-------------------- ST1 -----------------------
-------------------- ST2 -----------------------
---------------------- C ------------------------
---------------------- H ------------------------
---------------------- R ------------------------
---------------------- N ------------------------
REMARKS
Command codes
Sector ID
information prior to
command
execution
Data transfer
between the FDD
and system; FDD
reads contents of
all cylinders from
index hole to EOT
Status information
after command
execution
Sector ID
information after
command
execution
27