SENSE INTERRUPT STATUS
DATA BUS
PHASE
Command
R/W D7 D6 D5 D4 D3 D2 D1 D0
REMARKS
Command Codes
W
0
0
0
0
1
0
0
0
Result
R
─────── 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
REMARKS
Command Codes
0
0
0
0
0
0
1
1
W
─── SRT ───
─── HUT ───
W
────── HLT ──────
ND
SENSE DRIVE STATUS
DATA BUS
R/W D7 D6 D5 D4 D3
PHASE
D2
D1
D0
REMARKS
Command
W
W
R
0
0
0
0
0
1
0
0
Command Codes
0
0
0
0
0
HDS DS1 DS0
Result
─────── ST3 ───────
Status information about
FDD
SEEK
DATA BUS
PHASE
R/W D7 D6 D5 D4 D3
D2
D1
D0
REMARKS
Command
W
W
W
0
0
0
0
1
1
1
1
Command Codes
0
0
0
0
0
HDS DS1 DS0
─────── NCN ───────
Execution
Head positioned over
proper cylinder on
diskette.
SMSC DS – FDC37N769
Page 42 of 137
Rev. 02-16-07
DATASHEET
SMSC [ SMSC CORPORATION ]
