Gpio Base Address (Function 0); Gpio Enable (Function 0); Lpc Com Decode Ranges (Function 0) - Intel 460GX Software Developer’s Manual

LPC/FWH Interface Configuration
11.1.21

GPIO Base Address (FUNCTION 0)

Address:
Default Value:
Attributes:
Bit
31:16
15:6
5:1
0
11.1.22

GPIO Enable (FUNCTION 0)

Address:
Default Value
Attributes:
Bit
7:1
0
11.1.23

LPC COM Decode Ranges (Function 0)

Address:
Default Value:
Attributes:
Bit
7
6:4
11-10
D0-D3h
00000001h
Read/Write
Reserved.
Base Address: Provides the 64 bytes of I/O space.
Reserved.
Resource Indicator: Tied to 1 to indicate I/O space
D4h
00h
Read/Write
Reserved.
GPIO Enable: When this bit is set to '1', decode of the I/O range pointed to by the GPIO base
register is enabled, and the GPIO Function is enabled.
E0h
00h
Read/Write
Reserved.
Decode Range: The following table describes which range to decode for the COMB Port
Bits
000 3F8 - 3FF (COM 1)
001 2F8 - 2FF (COM 2)
010 220 - 227
011 228 - 22F
100 238 - 23F
101 2E8 - 2EF (COM 4)
110 338 - 33F
111 3E8 - 3EF (COM 3)
Description
Description
Description
Decode Range
Intel® 460GX Chipset Software Developer's Manual