參數(shù)資料
型號: FW82815
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): 49/172頁
文件大小: 795K
代理商: FW82815
82815 GMCH
R
Datasheet
49
31
26
25
24
16
Upper Prog. Base Address Bits
Lower
“HW”/Prog
Base
Address
Hardwired to 0s
15
4
3
2
0
Hardwired to 0s
Prefetch
able
Type
Mem
Space
Indicator
Bit
Description
31:26
Upper Programmable Base Address bits—R/W.
These bits are used to locate the range size selected
via lower bits 25:4.
Default = 0000
25
Lower “Hardwired”/Programmable Base Address bit .
This bit behaves as “hardwired” or as
programmable depending on the contents of the APSIZE register as defined below:
Aperture Size = 32 MB
#
r/w
Aperture Size = 64 MB
#
0 (default)
Bit 25 is controlled by the bit 3 of the APSIZE register in the following manner:
If bit APSIZE[3]=0 (indicating 64 MB aperture size), then APBASE[25]=0. If APSIZE[3]=1, then
APBASE[25]=r/w (read/write) allowing 32 MB aperture size if desired.
Default for APSIZE[3]=0b forces default APBASE[25] = 0b (bit responds as “hardwired” to 0). This
provides a default to the maximum aperture size of 64 MB. The GMCH specific BIOS is responsible
for selecting smaller size (if required) before PCI configuration software runs and establishes the
system address map.
24:4
Hardwired to 0.
This forces minimum aperture size selected by this register to be 32 MB.
3
Prefetchable—RO.
This bit is hardwired to 1 to identify the Graphics Aperture range as a prefetchable
(i.e., There are no side effects on reads, the device returns all bytes on reads regardless of the byte
enables, and the GMCH may merge processor writes into this range without causing errors).
2:1
Type—RO.
These bits determine addressing type and they are hardwired to 00 to indicate that address
range defined by the upper bits of this register can be located anywhere in the 32-bit address space.
0
Memory Space Indicator—RO.
Hardwired to 0 to identify aperture range as a memory range.
相關PDF資料
PDF描述
FWA-25A10F Fuse
FWA-30A10F Fuse
FWA-35A21F Fuse
FWA-40A21F Fuse
FWA-45A21F Fuse
相關代理商/技術參數(shù)
參數(shù)描述
FW82815 S L5NQ 制造商:Intel 功能描述:Graphics and Memory Controller Hub 544-Pin BGA
FW82815EM S L4MP 制造商:Intel 功能描述:GRAPHICS AND MEMORY CONTROLLER HUB (GMCH2-M)
FW82815SL5NQ 制造商:Intel 功能描述:
FW828201CA 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Controller Miscellaneous - Datasheet Reference
FW82840 S L3TA 制造商:Intel 功能描述:Memory Controller Hub 544-Pin BGA