W83877TF Datasheet, PDF (37/154 Pages) Winbond – I/O chip disk drive adapter

W83877TF
(16) Dumpreg
PHASE
Command
Result
R/W D7 D6 D5 D4 D3 D2 D1 D0
REMARKS
W
0
0
0
0
1
1
1
0 _{Registers placed in FIFO}
R
-------------------- PCN-Drive 0-----------------
R
-------------------- PCN-Drive 1 ----------------
R
-------------------- PCN-Drive 2-----------------
R
-------------------- PCN-Drive 3 ----------------
R
-------- SRT ----------- | -------- HUT ----------
R ------------ HLT -------------------------------------| ND
R
-------------------- SC/EOT --------------------
R LOCK 0 D3 D2 D1 D0 GAP WG
R 0 EIS EFIFO POLL| --- FIFOTHR ---- |
R
--------------------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
Command W
0
W
0
Result
R
D6 D5 D4 D3 D2 D1 D0
REMARKS
0
0
0
0
1
0
0 _{Command code}
0
0
0
0 HDS DS1 DS0
---------------- ST3 -------------------------
Status information about
disk drive
(20) Invalid
PHASE R/W
Command W
Result
R
D7 D6 D5 D4 D3 D2 D1 D0
REMARKS
------------- Invalid Codes -----------------
Invalid codes (no operation -
FDC goes into standby state)
-------------------- ST0 ----------------------
ST0 = 80H
- 27 -
Publication Release Date: March 1998
Version 0.61