- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄377496 > intel386 DX (Intel Corp.) 32-Bit CHMOS Microprocessor With Integrated Memory Management(32位CHMOS 微處理器帶集成存儲管理) PDF資料下載
參數(shù)資料
| 型號： | intel386 DX |
| 廠商： | Intel Corp. |
| 英文描述： | 32-Bit CHMOS Microprocessor With Integrated Memory Management(32位CHMOS 微處理器帶集成存儲管理) |
| 中文描述： | 32位CHMOS微處理器集成內存管理（32位CHMOS微處理器帶集成存儲管理） |
| 文件頁數(shù)： | 53/139頁 |
| 文件大?。?/td> | 1587K |
| 代理商： | INTEL386 DX |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁當前第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁第117頁第118頁第119頁第120頁第121頁第122頁第123頁第124頁第125頁第126頁第127頁第128頁第129頁第130頁第131頁第132頁第133頁第134頁第135頁第136頁第137頁第138頁第139頁
Intel386
TM
DX MICROPROCESSOR
structure of a program. While segment selectors can
be considered the logical ‘‘name’’ of a program
module or data structure, a page most likely corre-
sponds to only a portion of a module or data struc-
ture.
By taking advantage of the locality of reference dis-
played by most programs, only a small number of
pages from each active task need be in memory at
any one moment.
4.5.2 Paging Organization
4.5.2.1 PAGE MECHANISM
The Intel386 DX uses two levels of tables to trans-
late the linear address (from the segmentation unit)
into a physical address. There are three compo-
nents to the paging mechanism of the Intel386 DX:
the page directory, the page tables, and the page
itself (page frame). All memory-resident elements of
the Intel386 DX paging mechanism are the same
size, namely, 4K bytes. A uniform size for all of the
elements simplifies memory allocation and realloca-
tion schemes, since there is no problem with memo-
ry fragmentation. Figure 4-19 shows how the paging
mechanism works.
4.5.2.2 PAGE DESCRIPTOR BASE REGISTER
CR2 is the Page Fault Linear Address register. It
holds the 32-bit linear address which caused the last
page fault detected.
CR3 is the Page Directory Physical Base Address
Register. It contains the physical starting address of
the Page Directory. The lower 12 bits of CR3 are
always zero to ensure that the Page Directory is al-
ways page aligned. Loading it via a MOV CR3, reg
instruction causes the Page Table Entry cache to be
flushed, as will a task switch through a TSS which
changes
the value of CR0. (See 4.5.4
Translation
Lookaside Buffer
).
4.5.2.3 PAGE DIRECTORY
The Page Directory is 4K bytes long and allows up to
1024 Page Directory Entries. Each Page Directory
Entry contains the address of the next level of ta-
bles, the Page Tables and information about the
page table. The contents of a Page Directory Entry
are shown in Figure 4-20. The upper 10 bits of the
linear address (A22–A31) are used as an index to
select the correct Page Directory Entry.
231630–67
Figure 4-19. Paging Mechanism
31
12
11
10
9
8
7
6
5
4
3
2
1
0
OS
RESERVED
U
D
S
R
D
W
PAGE TABLE ADDRESS 31..12
0
0
D
A
0
0
P
Figure 4-20. Page Directory Entry (Points to Page Table)
53
相關PDF資料 |
PDF描述 |
|---|---|
| Intel386 EX | Highly Integrated, 32-Bit, Fully Static Embedded Micropocessor(32位高集成完全靜態(tài)嵌入式微處理器) |
| INTEL386 SXSA | 5-V 32-Bit Fully Static Embedded Microprocessor(5V，32位完全靜態(tài)嵌入式微處理器) |
| intel386 SX | 32-Bit CPU With a 16-Bit External Data Bus And a 24-bit External Address Bus(帶16位內部數(shù)據(jù)總線和24位內部地址總線32位微處理器) |
| INTEL386 | Intel386 EX Embedded Microprocessor |
| Intel387 dx | DX Math Coprocessor(32位數(shù)學協(xié)處理器) |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| INTEL386SX | 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:MICROPROCESSOR |
| INTEL387 | 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:Intel387TM SX MATH COPROCESSOR |
| INTEL387DX | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Intel387 DX - MATH COPROCESSOR |
| INTEL387SX | 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:Intel387 SX - MATH COPROCESSOR |
| INTEL387TMDX | 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:Intel387TM DX MATH COPROCESSOR |
發(fā)布緊急采購，3分鐘左右您將得到回復。