參數(shù)資料
型號(hào): 82439TX
廠商: INTEL CORP
元件分類: 存儲(chǔ)控制器/管理單元
英文描述: System Controller(系統(tǒng)控制器)
中文描述: 256M X 8, DRAM CONTROLLER, PBGA324
封裝: BGA-324
文件頁數(shù): 56/83頁
文件大?。?/td> 461K
代理商: 82439TX
82439TX (MTXC)
E
56
PRELIMINARY
The memory organization shown below represents the maximum 256 MB of address space. Accesses to
memory space above Top-of-DRAM (< 256 MB), video buffer, or the memory gaps (if enabled) are forwarded to
PCI, and these regions are not cacheable. Below 1 MB, there are several memory segments which have
selectable cacheability. None of the DRAM space occupied by the video buffer (except for SMM usage) or the
memory space gaps is remapped (and is therefore “l(fā)ost”).
4 GB
DOS Applications
(No Read/Write Protect)
(Always Cacheable)
Non-Cacheable in L2,
Cacheable in L1
Forwarded to PCI (Non-Cacheable)
256 MB + 640 KB
Optional HiSMRAM
ShadowArea384KB(Cacheable)
Forwarded to PCI (Non-Cacheable)
Optional TSEG (Cacheable)
128 KB/256 KB/512 KB/1 MB
256 MB + Top-of-DRAM
Forwarded to PCI (Non-Cacheable)
Cacheable
Optional Memory Space Gap
256 MB
64 MB
16 MB
14/15 MB
1 MB
768 KB
640 KB
512 KB
0
Cacheable
Expansion and BIOS Region
(Cacheable Segments)
Video Buffer
(SMM Space Non-Cacheable)
Optional Memory Space Gap
aliased
TSEG
System
DRAM
Top-of-DRAM
(DRB5)
Top-of-
Main Memory
aliased
mtxc_08
Figure 8. Memory Space Organization
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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