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Chapter 3
—
Basic
Hardware
Configuration
and Options
33
Table
3-1
3.4.
Options
for
the
Sun-
3/75
Table
3-2
2061
Expansion
Board
HO
Connectors
on
the
CPU
Card
Connector
Name
Ethernet
Video
Keyboard
(including
Mouse)
Serial
Port
A
Serial
Port
B
Pinouts
of
these
connectors
are
listed
in
Appendix
A; an
illustration
of
their
loca-
tion
is
given
in
Chapter
2.
The 2060
CPU
board
supplies a
minimum
of
two megabytes
and
a
maximum
of
four
megabytes of
main
memory
for the
Sun-3/75;
additional
memory
is
pro-
vided
by
the
2061 Expansion
card.
Each
2061 Expansion board
arrives
from
the factory
with
its
jumper
blocks
correctly
set
for
your
particular configuration.
The
2061 Expansion
board goes
in the
upper
slot.
System
Memory
—
Basic
and
Optional Configurations
Option
Number
Memory
on
Card
Sun-3/75M
-
2
2
Mbytes
(on
CPU
board)
Sun-3/75M
-
4
4
Mbytes
(on
CPU
board)
Sun-3/75M
-
102
2
Mbytes
(on
Expansion
board)
Sun-3/75M
-
104
4
Mbytes
(on
Expansion
board)
Thus,
a
maximum
of
8
Mbytes
are
allowed.
The
2061 expansion board
resides in the
upper
slot
of
the
backplane.
The
memory
on
the
2061 expansion board
is
connected
to the
processor
by
the
P2
bus.
The 2060
CPU
board
supplies
a
minimum
of
two megabytes
(and
a
maximum
of
four
megabytes) of
main
memory
for the
Sun-3/75;
additional
memory
is
pro-
vided
by
the
2061 expansion
card.
The
expansion
card contains
up
to
144
memory
chips, in several
optional configurations:
#sun
\r
microsystems
Revision
A
of 3
1
September
1
9S6
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