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AMD AMD5K86 - Preface; Notation

AMD AMD5K86
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AMD~
18524BjO-Mar1996
AMD5~6
Processor
Technicol
Reference
Manual
Preface
This
manual
describes
the
technical
features
of
the
AMD5
K
86™
processor,
and
its
differences
from
the
Pentium
processor,
at
a
level
of
detail
suitable
for
a
hardware
designer
or
system-software
developer
to
implement
system
boards,
core
system
logic,
and
system
software. Specifically,
the
manual
describes
the
following
aspects
of
the
processor
•
Internal
architecture
•
Software
differences
from
the
486
and
Pentium
processors
•
Performance
parameters
• Bus signals
functions
• Bus cycle
timing
•
Design
issues
for
system-board designs
•
Test
and
debugging
features
A full
description
of
the
x86
programming
environment
is
beyond
the
scope
of
this
manual.
Instead,
the
software
sections
describe
differences
from
the
486
processor's
programming
environment.
A
list
of
commercial
books
that
describe
the
x86 pro-
gramming
environment
and
other
subjects
of
potential
interest
appears
at
the
end
of
this
preface.
In
addition
to
descriptions
of
the
AMD5
K
86
processor's
unique
internal
architecture,
the
manual
incorporates
details
about
the
behavior
of
bus
signals
and
bus
cycles
that
are
standard
to
the
x86 processors
but
that
are
not
fully
documented
in
other
x86
manuals.
Notation
The
following
notation
is
used
in
this
manual:
b-Binary
d-Decimal
h-Hexadecimal
Set-
Written
with
a
value
of
1
Clear-
Written
with
a
value
of 0
GP
(D)-General-protection
exception
(13
decimal)
with
an
error
value
of
0
xv

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