SENSE INTERRUPT STATUS
DATA BUS
R/W D7 D6 D5 D4 D3 D2 D1 D0
PHASE
Command
Result
REMARKS
Command Codes
W
R
0
0
0
0
1
0
0
0
─────── ST0 ───────
Status information at the end
of each seek operation.
R
─────── PCN ───────
SPECIFY
DATA BUS
D7 D6 D5 D4 D3 D2 D1 D0
PHASE
Command
R/W
W
W
W
REMARKS
Command Codes
0
0
0
0
0
0
1
1
─── SRT ───
─── HUT ───
────── HLT ──────
ND
SENSE DRIVE STATUS
DATA BUS
R/W D7 D6 D5 D4 D3
PHASE
Command
D2
D1
0
D0
0
REMARKS
Command Codes
W
W
R
0
0
0
0
0
0
0
0
0
0
1
HDS DS1 DS0
Result
─────── ST3 ───────
Status information about
FDD
SEEK
DATA BUS
R/W D7 D6 D5 D4 D3
PHASE
D2
D1
D0
REMARKS
Command
W
W
W
0
0
0
0
0
0
0
0
1
0
1
1
1
Command Codes
HDS DS1 DS0
─────── NCN ───────
Execution
Head positioned over
proper cylinder on
diskette.
CONFIGURE
DATA BUS
PHASE
Command
R/W D7 D6
D5
0
D4
1
D3
0
D2
0
D1
1
D0
1
REMARKS
Configure
Information
W
0
0
W
W
W
0
0
0
0
0
0
0
0
0
EIS EFIFO POLL
─── FIFOTHR ───
Execution
───────── PRETRK ─────────
SMSC DS – FDC37N3869
Page 41
Rev. 10/25/2000
SMSC [ SMSC CORPORATION ]
