82830MP Datasheet, PDF (41/159 Pages) Intel Corporation – Intel 830MP Chipset: 82830MP Graphics and Memory Controller Hub (GMCH-M)

Intel^® 830MP Chipset
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Table 17. AGP/PCI1 Config Address Remapping
Config Address AD[15:11]
00000
00001
00010
00011
00100
00101
00110
00111
01000
01001
01010
01011
01100
01101
01110
01111
1xxxx
AGP GAD[31:16] IDSEL
0000 0000 0000 0001
0000 0000 0000 0010
0000 0000 0000 0100
0000 0000 0000 1000
0000 0000 0001 0000
0000 0000 0010 0000
0000 0000 0100 0000
0000 0000 1000 0000
0000 0001 0000 0000
0000 0010 0000 0000
0000 0100 0000 0000
0000 1000 0000 0000
0001 0000 0000 0000
0010 0000 0000 0000
0100 0000 0000 0000
1000 0000 0000 0000
0000 0000 0000 0000
If the Bus Number is non-zero, greater than the value programmed into the SECONDARY BUS
NUMBER register and less than or equal to the value programmed into the SUBORDINATE BUS
NUMBER register, the configuration cycle is targeting a PCI bus downstream of AGP/PCI1. The
GMCH-M will generate a Type 1 PCI configuration cycle on AGP/PCI1. The address bits will be
mapped as described in figure below.
Figure 7. Mechanism #1 Type 1 Configuration Address to PCI Address Mapping
31 30
24 23
16 15
11 10
87
21 0
CONFIG_ADDRESS 1 Reserved Bus Number Device Number Function Number Reg. Index X X
PCI Address
AD[31:0]
0
31
Bus Number Device Number Function Number Reg. Index 0 1
24 23
16 15
11 10
87
21 0
298338-001
Datasheet
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