W83877TF/W83877TG
Publication Release Date: May 2006
-25- Revision 0.7
(16) Dumpreg
PHASE R/W D7 D6 D5 D4 D3 D2 D1 D0 REMARKS
Command W
0 0 0 0 1 1 1 0
Registers placed in FIFO
Result
R
R
R
R
R
R
R
R
R
R
-------------------- PCN-Drive 0-----------------
-------------------- PCN-Drive 1 ----------------
-------------------- PCN-Drive 2-----------------
-------------------- PCN-Drive 3 ----------------
-------- SRT ----------- | -------- HUT ----------
------------ HLT -------------------------------------| ND
-------------------- SC/EOT --------------------
LOCK 0 D3 D2 D1 D0 GAP WG
0 EIS EFIFO POLL| --- FIFOTHR ---- |
--------------------PRETRK ---------------------
(17) Perpendicular Mode
PHASE R/W D7 D6 D5 D4 D3 D2 D1 D0 REMARKS
Command W
0 0 0 1 0 0 1 0
Command code
W
OW 0 D3 D2 D1 D0 GAP WG
(18) Lock
PHASE R/W D7 D6 D5 D4 D3 D2 D1 D0 REMARKS
Command W
LOCK 0 0 1 0 1 0 0
Command code
Result R
0 0 0 LOCK 0 0 0 0
(19) Sense Drive Status
PHASE R/W D7 D6 D5 D4 D3 D2 D1 D0 REMARKS
Command W
0 0 0 0 0 1 0 0
Command code
W
0 0 0 0 0 HDS DS1 DS0
Result
R
---------------- ST3 ------------------------- Status information about
disk drive
(20) Invalid
PHASE R/W D7 D6 D5 D4 D3 D2 D1 D0 REMARKS
Command W ------------- Invalid Codes ----------------- Invalid codes (no operation -
FDC goes into standby
state)
Result R -------------------- ST0 ---------------------- ST0 = 80H