JG82852GMSL7VP Datasheet, PDF (111/176 Pages) Intel Corporation – Intel® 852GM/852GMV Chipset Intel® 852GM/852GMV Chipset Hub (GMCH)

Intel 852GM/852GMV GMCH System Address Map
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4.
4.1.
Intel 852GM/852GMV GMCH System
Address Map
A system based on the GMCH supports 4 GB of addressable System Memory space and 64 kB+3B of
addressable I/O space. The I/O and System Memory spaces are divided by system configuration
software into regions. The System Memory ranges are useful either as System Memory or as specialized
System Memory, while the I/O regions are used solely to control the operation of devices in the system.
When the GMCH receives a write request whose address targets an invalid space, the data is ignored.
For reads, the GMCH responds by returning all zeros on the requesting interface.
System Memory Address Ranges
The GMCH provides a maximum System Memory of 1-GB. The GMCH does not remap APIC memory
space and does not limit DDR SDRAM space in hardware. It is the BIOS or system designer’s
responsibility to limit System Memory population so that adequate PCI High BIOS and APIC
memory space can be allocated. Figure 4 and Figure 5 represent System Memory address map in a
simplified form and provide details on mapping specific System Memory regions as defined and
supported by the GMCH.
Intel^® 852GM/852GMV Chipset GMCH Datasheet
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