9 usbba–usb i/o space base address (function 2), 10 svid–subsystem vendor id (function 2), 11 sid–subsystem id (function 2) – Intel 460GX User Manual
Page 249: 12 intln–interrupt line register (function 2), 9 usbba–usb, I/o space base address (function 2)
Intel® 460GX Chipset Software Developer’s Manual
13-5
Universal Serial Bus (USB) Configuration
13.2.9
USBBA–USB
I/O Space Base Address (Function 2)
Address Offset:
20-23h
Default Value:
00000001h
Attribute:
Read/Write
This register contains the base address of the USB I/O Registers.
13.2.10
SVID–Subsystem Vendor ID (Function 2)
Address:
2C-2Dh
Default Value:
0000h
Attribute:
Read only
13.2.11
SID–Subsystem ID (Function 2)
Address:
2E-2Fh
Default Value:
0000h
Attribute:
Read only
13.2.12
INTLN–Interrupt Line Register (Function 2)
Address Offset:
3Ch
Default Value:
00h
Attribute:
Read/Write
Software programs this register with interrupt information concerning the USB.
Bit
Description
31:16
Reserved. Hardwired to 0s. Must be written as 0S.
15:5
Index Register Base Address. Bits [15:5] correspond to I/O address signals AD [15:5],
respectively.
4:1
Reserved. Read as 0.
0
Resource Type Indicator (RTE)–RO. This bit is hardwired to 1 indicating that the base address
field in this register maps to I/O space.
Bit Description
15:0
Subsystem Vendor ID.
Bit Description
15:0 Subsystem
ID.
Bit
Description
7:0
Interrupt Line. The value in this register has no affect on IFB hardware operations.