CONFIGURE
DATA BUS
PHASE
Command
R/W D7 D6
D5
0
D4
D3
D2
0
D1
1
D0
1
REMARKS
W
0
0
1
0
Configure
Information
W
W
W
0
0
0
0
0
0
0
0
0
EIS EFIFO POLL
───────── PRETRK ─────────
─── FIFOTHR ───
Execution
RELATIVE SEEK
DATA BUS
PHASE
Command
R/W
W
W
REMARKS
D7 D6 D5 D4 D3
D2
1
D1
1
D0
1
1
0
DIR
0
0
0
0
0
1
0
HDS DS1 DS0
W
─────── RCN ───────
DUMPREG
DATA BUS
PHASE
R/W
REMARKS
D7
D6
D5
D4
D3 D2
D1
D0
Command
W
0
0
0
0
1
1
1
0
*Note:
Registers
placed in FIFO
Execution
Result
R
R
R
R
R
R
R
R
R
R
────── PCN-Drive 0 ───────
────── PCN-Drive 1 ───────
────── PCN-Drive 2 ───────
────── PCN-Drive 3 ───────
──── SRT ────
─────── HLT ───────
─────── SC/EOT ───────
D3 D2 D1 D0 GAP
EIS EFIFO POLL
─── HUT ───
ND
LOCK
0
0
WGATE
── FIFOTHR ──
──────── PRETRK ────────
READ ID
DATA BUS
PHASE
Command
R/W
W
W
REMARKS
Commands
D7
0
0
D6
MFM
0
D5 D4 D3
D2
0
D1
1
D0
0
0
0
0
0
1
0
HDS DS1 DS0
Execution
Result
The first correct ID
information on the Cylinder
is stored in Data Register
R
──────── ST0 ────────
Status information after
Command execution.
SMSC DS – FDC37N769
Page 44 of 137
Rev. 12/21/2000
SMSC [ SMSC CORPORATION ]
