Intel 386 manual Micro Channel-Compatible Solution with 82311 Chip Set

SYSTEM OVERVIEW

r:=:J INDICATES CHIP SET

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Figure 1-2. Micro Channel-Compatible Solution with 82311 Chip Set

The integrated memory management and protection mechanism translates logical addresses to physical addresses and enforces the protection rules necessary for maintain- ing task integrity in a multitasking environment. The paging function simplifies the operating-system swapping algorithms by providing a uniform mechanism for managing the physical structure of memory.

The Inte1386 DX microprocessor supports virtual 8086 (V86) mode. In this mode, one or more 8086 programs can be integrated into the protected, multitask environment of the Intel386 DX CPU. V86 tasks take advantage of the hardware support of multitasking offered by the Intel386 DX protected-mode, allowing multiple V86 tasks, each executing an 8086 program.

Task switching occurs frequently in real-time multitasking or multiuser systems. To per- form task switching efficiently, the Intel386 DX microprocessor incorporates special high-speed hardware. Only a single instruction or an interrupt is needed for the Intel386 DX microprocessor to perform a complete task switch. A 20-MHz Inte1386 DX

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