<s>
SPARCstation	B-Architecture
5	I-Architecture
or	O
SS5	O
(	O
code-named	O
Aurora	O
)	O
is	O
a	O
workstation	B-Device
introduced	O
by	O
Sun	O
Microsystems	O
in	O
March	O
1994	O
.	O
</s>
<s>
It	O
is	O
based	O
on	O
the	O
sun4m	B-Device
architecture	O
,	O
and	O
is	O
enclosed	O
in	O
a	O
pizza-box	B-General_Concept
chassis	O
.	O
</s>
<s>
Sun	O
also	O
offered	O
a	O
SPARCserver	B-Architecture
5	I-Architecture
without	O
a	O
framebuffer	O
.	O
</s>
<s>
A	O
simplified	O
,	O
cheaper	O
version	O
of	O
the	O
SS5	O
was	O
released	O
in	O
February	O
1995	O
as	O
the	O
SPARCstation	B-Architecture
4	I-Architecture
.	O
</s>
<s>
Sun	O
also	O
marketed	O
these	O
same	O
machines	O
under	O
the	O
"	O
Netra	O
"	O
brand	O
,	O
without	O
framebuffers	O
or	O
keyboards	O
and	O
preconfigured	O
with	O
all	O
the	O
requisite	O
software	O
to	O
be	O
used	O
as	O
web	B-Application
servers	I-Application
.	O
</s>
<s>
An	O
estimated	O
400,000	O
+	O
SPARCstation	B-Architecture
5s	I-Architecture
were	O
sold	O
.	O
</s>
<s>
Sun	O
rolled	O
out	O
the	O
SPARCstation	B-Architecture
5	I-Architecture
for	O
.	O
</s>
<s>
The	O
SPARCstation	B-Architecture
5	I-Architecture
may	O
incorporate	O
one	O
of	O
the	O
following	O
processors	O
:	O
70	O
,	O
85	O
,	O
or	O
110MHz	O
Sun	O
Microsystems	O
microSPARC-II	B-Device
,	O
or	O
a	O
170MHz	O
Fujitsu	O
Microelectronics	O
,	O
Inc	O
.	O
(	O
FMI	O
)	O
TurboSPARC	B-Device
.	O
</s>
<s>
Fujitsu	O
also	O
provided	O
a	O
160MHz	O
TurboSPARC	B-Device
CPU	O
Upgrade	O
Kit	O
for	O
upgrading	O
70	O
,	O
85	O
and	O
110MHz	O
microSPARC-II	B-Device
models	O
.	O
</s>
<s>
The	O
SPARCstation	B-Architecture
5	I-Architecture
has	O
no	O
MBus	O
and	O
thus	O
is	O
limited	O
to	O
use	O
as	O
a	O
single-processor	O
machine	O
.	O
</s>
<s>
The	O
SPARCstation	B-Architecture
5	I-Architecture
has	O
eight	O
DSIMM	O
slots	O
for	O
memory	O
expansion	O
.	O
</s>
<s>
The	O
SPARCstation	B-Architecture
4	I-Architecture
uses	O
the	O
same	O
memory	O
.	O
</s>
<s>
The	O
SPARCstation	B-Architecture
5	I-Architecture
can	O
hold	O
two	O
internal	O
80-pin	O
SCA	O
,	O
single-ended	O
,	O
fast-narrow	O
SCSI	B-Architecture
drives	O
,	O
a	O
SCSI	B-Architecture
CD-ROM	O
drive	O
and	O
a	O
floppy	O
.	O
</s>
<s>
It	O
also	O
supports	O
external	O
SCSI	B-Architecture
devices	O
.	O
</s>
<s>
The	O
SPARCstation	B-Architecture
5	I-Architecture
comes	O
with	O
an	O
on-board	O
AMD	O
Lance	O
ethernet	O
chipset	O
providing	O
10BASE-T	B-Protocol
networking	O
as	O
standard	O
and	O
10Base2	O
and	O
10Base5	O
via	O
an	O
AUI	B-Protocol
transceiver	O
.	O
</s>
<s>
Like	O
all	O
other	O
SPARCstation	B-Device
systems	O
,	O
the	O
SS5	O
holds	O
system	O
information	O
such	O
as	O
MAC	O
address	O
and	O
serial	O
number	O
in	O
NVRAM	O
.	O
</s>
<s>
The	O
SPARCstation	B-Architecture
5	I-Architecture
has	O
three	O
SBus	B-Architecture
expansion	O
slots	O
which	O
are	O
typical	O
of	O
Sun	O
computer	O
equipment	O
of	O
this	O
era	O
.	O
</s>
<s>
The	O
third	O
of	O
these	O
shares	O
its	O
expansion	O
backplate	O
and	O
physical	O
space	O
with	O
a	O
special	O
AFX	O
connector	O
which	O
was	O
unique	O
to	O
the	O
SPARCstation	B-Architecture
5	I-Architecture
.	O
</s>
<s>
This	O
was	O
a	O
framebuffer	O
that	O
allowed	O
the	O
use	O
of	O
24-bit	O
colour	O
graphics	O
instead	O
of	O
the	O
8-bit	O
colour	O
of	O
the	O
SBus	B-Architecture
CG6	O
card	O
,	O
also	O
known	O
as	O
the	O
LEGO	O
(	O
Low	O
End	O
Graphics	O
Option	O
)	O
.	O
</s>
<s>
The	O
SPARCstation	B-Architecture
4	I-Architecture
(	O
code-named	O
Perigee	O
)	O
was	O
introduced	O
in	O
February	O
1995	O
to	O
provide	O
a	O
lower	O
price	O
point	O
than	O
the	O
SPARCstation	B-Architecture
5	I-Architecture
and	O
replace	O
the	O
SPARCclassic	B-Architecture
.	O
</s>
<s>
Although	O
offered	O
with	O
the	O
same	O
70	O
,	O
85	O
,	O
or	O
110MHz	O
microSPARC-II	B-Device
processor	O
as	O
the	O
SPARCstation	B-Architecture
5	I-Architecture
,	O
it	O
has	O
only	O
one	O
SBus	B-Architecture
expansion	O
slot	O
instead	O
of	O
three	O
,	O
a	O
single	O
1.05	O
GB	O
hard	O
drive	O
,	O
and	O
maximum	O
memory	O
capacity	O
of	O
160	O
MB	O
instead	O
of	O
256	O
MB	O
(	O
five	O
DSIMM	O
slots	O
)	O
.	O
</s>
<s>
Instead	O
of	O
the	O
built-in	O
audio	O
of	O
the	O
SPARCstation	B-Architecture
5	I-Architecture
,	O
the	O
SPARCstation	B-Architecture
4	I-Architecture
requires	O
an	O
optional	O
module	O
,	O
installed	O
in	O
its	O
own	O
dedicated	O
slot	O
.	O
</s>
<s>
The	O
SPARCstation	B-Architecture
4	I-Architecture
has	O
a	O
standard	O
AUI	B-Protocol
Ethernet	O
connector	O
,	O
unlike	O
the	O
SPARCstation	B-Architecture
5	I-Architecture
which	O
requires	O
a	O
special	O
cable	O
to	O
mate	O
with	O
a	O
non-standard	O
connector	O
.	O
</s>
<s>
Sun	O
used	O
the	O
same	O
enclosure	O
as	O
the	O
SPARCstation	B-Architecture
4	I-Architecture
for	O
the	O
SPARC	O
Xterminal	O
1	O
,	O
which	O
was	O
,	O
as	O
the	O
name	O
implies	O
,	O
marketed	O
as	O
an	O
X	B-Protocol
terminal	I-Protocol
,	O
with	O
no	O
local	O
storage	O
.	O
</s>
<s>
Unlike	O
the	O
earlier	O
SPARCclassic	B-Architecture
X	O
,	O
it	O
did	O
not	O
use	O
the	O
same	O
motherboard	O
as	O
the	O
workstation	B-Device
it	O
was	O
derived	O
from	O
,	O
instead	O
using	O
a	O
lower-powered	O
50MHz	O
microSPARC	B-Device
processor	O
and	O
expansion	O
from	O
its	O
base	O
memory	O
of	O
8	O
MB	O
to	O
128	O
MB	O
rather	O
than	O
160	O
MB	O
(	O
four	O
DSIMM	O
slots	O
)	O
.	O
</s>
<s>
Rather	O
than	O
running	O
Solaris	B-Application
,	O
the	O
SPARC	O
Xterminal	O
1	O
and	O
SPARCclassic	B-Architecture
X	O
loaded	O
and	O
ran	O
special	O
software	O
over	O
the	O
network	O
.	O
</s>
<s>
Sun	O
offered	O
an	O
upgrade	O
kit	O
to	O
a	O
full	O
workstation	B-Device
that	O
included	O
a	O
swap	O
to	O
a	O
SPARCstation	B-Architecture
4	I-Architecture
motherboard	O
,	O
a	O
hard	O
drive	O
and	O
additional	O
memory	O
.	O
</s>
<s>
The	O
following	O
operating	B-General_Concept
systems	I-General_Concept
will	O
run	O
on	O
a	O
SPARCstation	B-Architecture
5	I-Architecture
:	O
</s>
