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SYSTEM OVERVIEW
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INDICATES CHIP SET
231732i1-2
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, multi task 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
1-3