參數資料
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: 35/139頁
文件大?。?/td> 1587K
代理商: INTEL386 DX
Intel386
TM
DX MICROPROCESSOR
4.2 ADDRESSING MECHANISM
Like Real Mode, Protected Mode uses two compo-
nents to form the logical address, a 16-bit selector is
used to determine the linear base address of a seg-
ment, the base address is added to a 32-bit effective
address to form a 32-bit linear address. The linear
address is then either used as the 32-bit physical
address, or if paging is enabled the paging mecha-
nism maps the 32-bit linear address into a 32-bit
physical address.
The difference between the two modes lies in calcu-
lating the base address. In Protected Mode the se-
lector is used to specify an index into an operating
system defined table (see Figure 4-1). The table
contains the 32-bit base address of a given seg-
ment. The physical address is formed by adding the
base address obtained from the table to the offset.
Paging provides an additional memory management
mechanism which operates only in Protected Mode.
Paging provides a means of managing the very large
segments of the Intel386 DX. As such, paging oper-
ates beneath segmentation. The paging mechanism
translates the protected linear address which comes
from the segmentation unit into a physical address.
Figure 4-2 shows the complete Intel386 DX address-
ing mechanism with paging enabled.
231630–55
Figure 4-1. Protected Mode Addressing
231630–56
Figure 4-2. Paging and Segmentation
35
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位內部數據總線和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位數學協(xié)處理器)
相關代理商/技術參數
參數描述
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