
82C814
Page 36
January 08, 1998
912-3000-047
Revision: 1.0
OPTi
5.5
Docking Station Window Selection 
Group
One block of the 82C814 PCI-to-CardBus configuration regis-
ters is used to select the memory or I/O address ranges that
will be claimed by the bridge and passed onto the secondary
PCI bus for use with the OPTi PCI-to-ISA Bridge.
Windows 4-7, which were available in Rev 0.0 of the 82C814
chip and overlapped the CardBus windows, are no longer
available. Table 5-5 summarizes the features.
The docking station access windows allow far more flexibility
in cycle selection, masking, etc. than do the CardBus window
registers. 
5.5.1
The docking station registers are listed in Table 5-5. Table 5-
6 follows and includes the default settings for each register.
Docking Station Window Registers
Socket can sup-
ply Voltage Y:
0 = No
1 = Yes
Socket can sup-
ply Voltage X:
0 = No
1 = Yes
Socket can 
supply 3.3V:
0 = No
1 = Yes
Socket can 
supply 5.0V:
0 = No
1 = Yes
Reserved:
Write as read.
PCICFG 6Ch / MEMOFST 0Ch
Force Event Register - Byte 0
Default = 00h
Force dock rec-
ognized bit to 1:
0 = No
1 = Yes
Reserved:
Write as read.
Force device type:
11 = Docking station
All other combinations reserved
Force power 
cycle event:
0 = No
1 = Yes
Force CCD2#
event:
0 = No
1 = Yes
Force CCD1#
event:
0 = No
1 = Yes
Reserved
PCICFG 6Dh / MEMOFST 0Dh
Force Event Register - Byte 1
Default = 00h
Reserved:
Write as read.
Force retest of 
CVS1-2, 
CCD1-2# pins 
(or force bits):
0 = No
1 = Yes
Reserved
Force 3.3V 
dock detected 
bit to 1:
0 = No
1 = Yes
Force 5.0V 
dock detected 
bit to 1:
0 = No
1 = Yes
Force bad VCC 
request bit to 1:
0 = No
1 = Yes
Force data lost 
bit to 1:
0 = No
1 = Yes
PCICFG 6Eh / MEMOFST 0Eh
Force Event Register - Byte 2
Reserved: Write as read.
Default = 00h
PCICFG 6Fh / MEMOFST 0Fh
Force Event Register - Byte 3
Reserved: Write as read.
Default = 00h
PCICFG 70h / MEMOFST 10h
Control Register - Byte 0
Default = 00h
Reserved:
Write as read.
Dock VCC power request:
000 = Power off
001 = Reserved
010 = 5.0V
011 = 3.3V
100 = Voltage X
101 = Voltage Y
11x = Reserved
Reserved:
Write as read.
Dock VPP Power Request
Read/write bits; do not have any function. If 
PCICFG 50h[0] = 1, these bits always return 0.
PCICFG 71h / MEMOFST 11h
Control Register - Byte 1
Reserved: Write as read.
Default = 00h
PCICFG 72h / MEMOFST 12h
Control Register - Byte 2
Reserved: Write as read.
Default = 00h
PCICFG 73h / MEMOFST 13h
Control Register - Byte 3
Reserved: Write as read.
Default = 00h
PCICFG 74h / MEMOFST 14h
Reserved
Default = 00h
Table 5-4
CardBus Register Group - PCICFG 60h-74h / MEMOFST 00h-7Fh
7
6
5
4
3
2
1
0