Instruction Set
Table 33 - Instruction Set
READ DATA
DATA BUS
D5 D4 D3 D2 D1 D0
PHASE
Command
R/W D7
D6
REMARKS
Command Codes
W
W
W
MT MFM SK
0
0
0
0
0
1
1
0
0
0
HDS DS1 DS0
──────── C ────────
Sector ID information prior to
Command execution.
W
W
W
W
W
W
──────── H ────────
──────── R ────────
──────── N ────────
─────── EOT ───────
─────── GPL ───────
─────── DTL ───────
Execution
Result
Data transfer between the FDD and
system.
R
─────── ST0 ───────
Status information after Command
execution.
R
R
R
─────── ST1 ───────
─────── ST2 ───────
──────── C ────────
Sector ID information after Command
execution.
R
R
R
──────── H ────────
──────── R ────────
──────── N ────────
READ DELETED DATA
DATA BUS
D5 D4 D3 D2 D1 D0
PHASE
R/W D7
D6
REMARKS
Command
W
W
W
MT MFM SK
0
0
1
0
1
0
0
Command Codes
0
0
0
HDS DS1 DS0
──────── C ────────
Sector ID information prior to
Command execution.
W
W
W
W
W
W
──────── H ────────
──────── R ────────
──────── N ────────
─────── EOT ───────
─────── GPL ───────
─────── DTL ───────
Execution
Result
Data transfer between the FDD and
system.
R
─────── ST0 ───────
Status information after Command
execution.
R
R
R
─────── ST1 ───────
─────── ST2 ───────
──────── C ────────
Sector ID information after Command
execution.
R
R
R
──────── H ────────
──────── R ────────
──────── N ────────
SMSC DS – FDC37N3869
Page 37
Rev. 10/25/2000
SMSC [ SMSC CORPORATION ]
