Primary
I/O
Drawer
The
primary
I/O
drawer
has
the
following:
v
14
PCI
slots
v
System
operator
panel
v
SPCN
controller
v
System
media
v
Service
processor
v
Optional
boot
DASDs
that
occupy
PCI
slots
13
and
14
v
Various
connectors,
including
four
serial
port
connectors,
on
the
back
of
the
drawer
for
the
attachment
of
external
devices
Note:
Serial
ports
1
and
2
can
only
be
used
to
access
the
service
processor
menus.
No
″
heartbeat
″
-type
devices
or
cables
can
be
used
on
these
ports.
″
Heartbeat
″
-type
devices
or
cables
must
be
installed
on
serial
port
3
or
serial
port
4.
The
PCI
bus
speeds
are
as
follows:
v
Up
to
33
MHz
for
the
four
32-bit
slots
at
5
V
v
Up
to
66
MHz
for
the
ten
64-bit
slots
at
3.3
V
Slots
1-5,
8-10,
13
and
14
support
either
32-
or
64-bit
PCI
adapters.
The
remaining
slots
are
32-bit
only.
The
CEC
drawer
includes
the
interrupt
and
system
bus
control
logic.
The
primary
I/O
drawer
has
space
for
up
to
three
media
devices.
The
diskette
drive
and
CD-ROM
drive
are
standard;
the
third
media
device
is
optional.
“Data
Flow”
on
page
4
illustrates
the
system’s
data
flow.
Chapter
1.
Reference
Information
3
Summary of Contents for RS/6000 Enterprise Server M80
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