NH82810 S L7XK Intel, NH82810 S L7XK Datasheet - Page 69

• Manufacturer Part Number: NH82810 S L7XK
• Manufacturer: Intel

Specifications of NH82810 S L7XK

• Lead Free Status / RoHS Status: Compliant

4.
4.1.
Datasheet
Note: The GMCH Memory Map includes a number of programmable ranges, ALL of these ranges MUST be
R
Functional Description
This chapter describes the Graphics and Memory Controller Hub (GMCH) interfaces on-chip functional
units. Sectiom 4.1, “System Address Map”, provides a system-level address memory map and describes
the memory space controls provided by the GMCH.
System Address Map
An Intel
based on the GMCH, supports 4 GB of addressable memory space and 64 KB+3 of addressable I/O
space. (The P6 bus I/O addressability is 64KB + 3). There is a programmable memory address space
under the 1 MB region that can be controlled with programmable attributes of Write Only, or Read Only.
Attribute programming is described in Chapter 3, “Configuration Registers”. This section focuses on
how the memory space is partitioned and what these separate memory regions are used for. The I/O
address space is explained at the end of this section.
The Intel
addressing of memory ranges larger than 4 GB. The GMCH Host Bridge claims any access over 4 GB by
terminating transaction (without forwarding it to the hub interface). Writes are terminated by dropping
the data and for reads the GMCH returns all zeros on the host bus.
In the following sections, it is assumed that all of the compatibility memory ranges reside on the hub
interface. The exceptions to this rule are the VGA ranges that may be mapped to the internal Graphics
Device.
unique and NON-OVERLAPPING. There are NO Hardware Interlocks to prevent problems in the case
of overlapping ranges. Accesses to overlapped ranges may produce indeterminate results.


Pentium
Pentium III processor, Intel
®
III processor, Intel


Pentium II processor, and Intel
Pentium
®
II processor, or Intel


Celeron
Celeron
Intel
TM
TM
processor system
processor supports
®
82810E (GMCH)
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