Functional
Description
3
Introduction
Computer Overview
~v1odels
330
and
350 are improved versions of
the
:Model 310
and
320.
They
were redesigned
for higher performance
to
meet
the
compute-intensive requirements for design
automation,
as
well as scientific analysis,
and
general
purpose
computation.
Both
are
more
tightly
integrated
than
their
predecessors
with
fewer physical pieces.
They
are
similar in
construction
and
uses
the
same
power supply.
For
the
computers,
most
noticeable is
the
different
board
and
card
slots.
Depending
on
the
version,
there
are:
• Four DIO-II
system
board
slots in
the
standard
computer.
•
Three
system
and
two
standard
DIO
slots in a
computer
that's
had
the
2-s10t
DIO
back-
plane added.
• Two systerrl
and
four
standard
DIO slots in a
computer
that's
had
the
4-slot
DIO
back-
plane added.
Expander Overview
Two direct-connect
expanders
permit
additional accessory
boards
and
cards
to
be
used in
the
computer
systerrl.
Each
attaches
directly
to
the
computer
through
a solid
connector
between
their
motherboards.
The
HP
98568A
Opt.
132
is
an
improved version
of
the
earlier DIO
expander
used
with
l\10del 310/320 computers. A new expander,
the
HP
98570A,
adds
the
larger
system
board
slots
to
computer
systems.
In
the
expanders,
the
board
and
card
slots
are
identified below. Depending
on
the
version,
there
are:
• Two
system
and
four
standard
DIO
slots in a
standard
HP
98570A expander.
• Four systerrl slots in
an
HP
98570A
expander
with
a delete
option
for
the
four DIO slots.
•
Eight
DIO
slots in
an
HP98568A
Opt.
132
expander.
Computer Architecture
Here's
an
overview
of
the
architecture
used in
the
Model 330/350 computers. You'll
note
that
these
computer's
provide
the
peak
perfonnance
potential
of
the
Motorola
architecture
and
lnaintain
Series 300 compatibility.
Model 350 Cache-Based DeSign
The
Model 350 eInploys a cache-based design.
It
has a large cache
to
acconlodate
the
25
MHz
dock
rate
of
the
CPU
and
is
32
Kbytes
in size. In addition,
the
Model 350 provides fast access
tirrles
to
high-speed RAM over a synchronous bus,
the
systenl bus.
The
system bus
is
connected
between
the
processor
board
and
RAM
assemblies via a special system slot cover plate.
Figure 3-1
is
a block
diagram
of
the
Model :{30/350 architecture.
Functional Description
51
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