October 2002
Intermediate to advanced
430 pages
14h 57m
English
Content preview from Embedded Systems Design, 2nd Edition
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Embedded processors 35
This removes the dependency of the processor on faster external
memory to maintain sufficient data flow to allow the processor to
continue executing instead of stalling. The 80486 also integrates a
80387 compatible fast floating point unit and thus does not need
an external coprocessor.
Instruction set
The instruction set is essentially the same as the 80386 but
there are some additional instructions available when running in
protected mode to control the memory management and floating
point units.
Intel 486SX and overdrive processors
The 80486 is available in several different versions which
offer different facilities. The 486SX is ...
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