W83787IF Datasheet, PDF (27/123 Pages) Winbond – WINBOND I/O WITH SERIAL-INFRARED SUPPORT

W83787IF
(10) Specify
PHASE R/W
Command W
W
W
D7 D6 D5 D4 D3 D2 D1 D0
00 0 00 0 11
| ---------SRT ----------- | --------- HUT ---------- |
|------------ HLT ----------------------------------| ND
REMARKS
Command codes
(11) Seek
PHASE R/W
Command W
W
W
Execution R
D7 D6 D5 D4 D3 D2 D1 D0
00 0 01 1 11
0 0 0 0 0 HDS DS1 DS0
-------------------- NCN -----------------------
REMARKS
Command codes
Head positioned over
proper cylinder on diskette
(12) Sense Drive Status
PHASE R/W
D7 D6 D5 D4 D3 D2 D1 D0
Command W
00000 100
W
0 0 0 0 0 HDS DS1 DS0
Result
R
---------------- ST3 -------------------------
REMARKS
Command Code
Status information about
disk drive
(13) Invalid
PHASE R/W
Command W
Result
R
D7 D6 D5 D4 D3 D2 D1 D0
------------- Invalid Codes -----------------
-------------------- ST0 ----------------------
REMARKS
Invalid codes (no operation
- FDC goes into standby
state)
ST0 = 80H
- 27 -
Publication Release Date:Sep 1995
Revision A1