W83977AF Information Storage Devices, Inc, W83977AF Datasheet - Page 41

• Manufacturer Part Number: W83977AF
• Description: W83877TF Plus Kbc, Cir, RTC
• Manufacturer: Information Storage Devices, Inc

(16) Dumpreg
(17) Perpendicular Mode
(18) Lock
(19) Sense Drive Status
(20) Invalid
Command
Result
Command
Command
Result
Command
Result
Command
Result
PHASE
PHASE
PHASE
PHASE
PHASE
R/W
R/W
R/W
R/W
R/W
W
W
W
W
W
W
W
R
R
R
R
R
R
R
R
R
R
R
R
R
LOCK 0
OW
D7
D7
-----------------------PRETRK -------------------------
D7
D7
0
D7
----------------------- PCN-Drive 0--------------------
----------------------- PCN-Drive 1 -------------------
----------------------- PCN-Drive 2--------------------
----------------------- PCN-Drive 3 -------------------
--------SRT ------------------ | --------- HUT --------
0 EIS EFIFO POLL | ------ FIFOTHR --------
0
0
----------- HLT -----------------------------------| ND
0
------------------------ SC/EOT ----------------------
LOCK 0
0
------------- Invalid Codes -----------------
---------------- ST3 -------------------------
-------------------- ST0 ----------------------
D6
D6
D6
D6
0
0
D6
0
0
0
0
D3
D5
D5
0
D5
D5
0
D5
D3
0
0
0
0
LOCK
D4
D4
D2
D4
D4
D2
1
D4
0
0
0
1
D1
D3
0
D3
D3
D3
D3
D1
0
0
0
1
0
HDS DS1 DS0
D0 GAP
D0 GAP WG
D2
D2
D2
D2
D2
1
0
1
1
0
D1
D1
D1
D1
D1
0
1
0
0
W83977F/ W83977AF
1
Publication Release Date: March 1998
WG
D0
D0
D0
D0
D0
0
0
0
0
0
Invalid codes (no
operation- FDC goes to
standby state)
ST0 = 80H
Command Code
Status information about
disk drive
Command Code
Command Code
Registers placed in FIFO
-30-
REMARKS
REMARKS
REMARKS
REMARKS
PRELIMINARY
REMARKS
Revision 0.58