VT82C586B Просмотр технического описания (PDF) - Unspecified
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VT82C586B Datasheet PDF : 69 Pages
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Configuration Space I/O
Mechanism #1
These ports respond only to double-word accesses. Byte or
word accesses will be passed on unchanged.
Port CFB-CF8 - Configuration Address .........................RW
31 Configuration Space Enable
0 Disabled .................................................default
1 Convert configuration data port writes to
configuration cycles on the PCI bus
30-24 Reserved ........................................ always reads 0
23-16 PCI Bus Number
Used to choose a specific PCI bus in the system
15-11 Device Number
Used to choose a specific device in the system
10-8 Function Number
Used to choose a specific function if the selected
device supports multiple functions
7-2 Register Number
Used to select a specific DWORD in the device’s
configuration space
1-0 Fixed
........................................ always reads 0
Port CFF-CFC - Configuration Data ..............................RW
Refer to PCI Bus Specification Version 2.1 for further details
on operation of the above configuration registers.
VT82C586B
Revision 1.0 May 13, 1997
-20-
Configuration Space I/O
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