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319537-003US 参数 Datasheet PDF下载

319537-003US图片预览
型号: 319537-003US
PDF下载: 下载PDF文件 查看货源
内容描述: 英特尔系统控制器中心 [Intel System Controller Hub]
分类和应用: 控制器
文件页数/大小: 450 页 / 2593 K
品牌: INTEL [ INTEL ]
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Register and Memory Mapping  
5.3  
System Memory Map  
The Intel® SCH supports up to 2 GB of physical DDR2 memory space and 64 KB+3 of  
addressable I/O space. There is a programmable memory address space under the  
1 MB region which is divided into regions that can be individually controlled with  
programmable attributes such as Disable, Read/Write, Write Only, or Read Only. This  
section describes how the memory space is partitioned and how those partitions are  
used.  
Top of Memory (TOM) is the highest address of physical memory actually installed in  
the system. TOM greater than 2GB is not supported.  
Memory addresses above 2 GB will be routed to internal controllers or external I/O  
devices. Any memory access between TOM and 2 GB will return indeterminate results,  
and writes will be ignored.  
Figure 3 represents system memory address map in a simplified form.  
Figure 3.  
System Address Ranges  
4 GB  
PCI Memory  
Address Range  
2 GB  
(TOM)  
Main Memory  
Address Range  
1 MB  
Legacy  
Address Range  
0
Table 10.  
Intel® SCH Memory Map (Sheet 1 of 2)  
Starting  
Address  
Ending  
Address  
Device  
Comment  
Legacy Address Range (0 to 1 MB)  
Access to this range will be forward to  
PCI Express if the Intel Graphics Media  
Adapter is disabled.  
Legacy Video (VGA)  
Expansion Area  
000A0000h  
000BFFFFh  
000C0000h  
000E0000h  
000DFFFFh  
000EFFFFh  
Extended BIOS  
(LPC)  
BIOS (LPC)  
LPC  
000F0000h  
000E0000h  
000FFFFFh  
000FFFFFh  
Main Memory1 (1 MB to Top Of Memory2)  
TSEG  
Variable  
Variable  
Variable  
Variable  
System Management Mode memory  
Graphics  
60  
Datasheet