參數(shù)資料
型號: FW82439TX
英文描述: Controller Miscellaneous - Datasheet Reference
中文描述: 控制器雜項-數(shù)據(jù)表參考
文件頁數(shù): 58/102頁
文件大?。?/td> 759K
代理商: FW82439TX
Extended Temperature 82439TX (MTXC) Datasheet
58
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”).
4GB
DOSApplications
(NoRead/WriteProtect)
(AlwaysCacheable)
Non-CacheableinL2,
CacheableinL1
ForwardedtoPCI (Non-Cacheable)
256MB+640KB
Optional HiSMRAM
ShadowArea384KB(Cacheable)
ForwardedtoPCI (Non-Cacheable)
Optional TSEG(Cacheable)
128KB/256KB/512KB/1MB
256MB+Top-of-DRAM
ForwardedtoPCI (Non-Cacheable)
Cacheable
Optional MemorySpaceGap
256MB
64MB
16MB
14/15MB
1MB
768KB
640KB
512KB
0
Cacheable
ExpansionandBIOSRegion
(CacheableSegments)
VideoBuffer
(SMMSpaceNon-Cacheable)
Optional MemorySpaceGap
aliased
TSEG
System
DRAM
Top-of-DRAM
(DRB5)
Top-of-
MainMemory
aliased
mtxc_08
Figure 8. Memory Space Organization
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