82091AA Datasheet, PDF (138/204 Pages) Intel Corporation – ADVANCED INTEGRATED PERIPHERAL (AIP)

82091AA
Table 24 FDC Command Set (Continued)
Data Bus
Phase R W
D7 D6 D5 D4
D3 D2 D1
D0
Remarks
Option
Command W 0
0
1
1
W
RSVD
00
1
1 Command Code
ISO
Save
Command W 0
0
1
0
11
1
0 Command Code
Result
R RSVD RSVD PD PC2
PC1 PC0 DRATE1 DRATE0 Save Information to
OSC
Reprogram the FDC
0
0
0
0
00
0
ISO
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
0
0
D1 D0 GAP WGATE
R 0 EIS EFIFO POLL
FIFOTHR
R
PRETRK
R0
0 EREG 0
RSVD FDI MIN AUTO
EN
TRI DLY
PD
R
DISK STATUS
R
RSVD
R
RSVD
Restore
Command W 0
1
0
0
11
1
0 Command Code
W0
0
0 PC2
PC1 PC0 DRATE1 DRATE0 Restore Original
W0
0
0
0
00
0
ISO Register Status
W
PCN-Drive 0
W
PCN-Drive 1
W
PCN-Drive 2
W
PCN-Drive 3
W
SRT
HUT
W
HLT
ND
W
SC EOT
W LOCK 0
0
0
D1 D0 GAP WGATE
W 0 EIS EFIFO POLL
FIFOTHR
W
PRETRK
W0
0 EREG 0
RSVD FDI MIN AUTO
EN
TRI DLY
PD
W
DISK STATUS
W
RSVD
W
RSVD
138