<s>
Sun-1	B-Device
was	O
the	O
first	O
generation	O
of	O
UNIX	B-Application
computer	B-Device
workstations	I-Device
and	O
servers	O
produced	O
by	O
Sun	O
Microsystems	O
,	O
launched	O
in	O
May	O
1982	O
.	O
</s>
<s>
The	O
Sun-1	B-Device
systems	O
ran	O
SunOS	B-Operating_System
0.9	O
,	O
a	O
port	O
of	O
UniSoft	B-Operating_System
's	O
UniPlus	B-Operating_System
V7	O
port	O
of	O
Seventh	B-Operating_System
Edition	I-Operating_System
UNIX	I-Operating_System
to	O
the	O
Motorola	B-Device
68000	I-Device
microprocessor	I-Device
,	O
with	O
no	O
window	B-Application
system	I-Application
.	O
</s>
<s>
Early	O
Sun-1	B-Device
workstations	B-Device
and	O
servers	O
used	O
the	O
original	O
Sun	O
logo	O
,	O
a	O
series	O
of	O
red	O
"	O
U	O
"	O
s	O
laid	O
out	O
in	O
a	O
square	O
,	O
rather	O
than	O
the	O
more	O
familiar	O
purple	O
diamond	O
shape	O
used	O
later	O
.	O
</s>
<s>
The	O
first	O
Sun-1	B-Device
workstation	B-Device
was	O
sold	O
to	O
Solo	O
Systems	O
in	O
May	O
1982	O
.	O
</s>
<s>
The	O
Sun-1/100	O
was	O
used	O
in	O
the	O
original	O
Lucasfilm	O
EditDroid	O
non-linear	O
editing	O
system	O
.	O
</s>
<s>
The	O
Sun-1	B-Device
workstation	B-Device
was	O
based	O
on	O
the	O
Stanford	O
University	O
SUN	B-Device
workstation	I-Device
designed	O
by	O
Andy	O
Bechtolsheim	O
(	O
advised	O
by	O
Vaughan	O
Pratt	O
and	O
Forest	O
Baskett	O
)	O
,	O
a	O
graduate	O
student	O
and	O
co-founder	O
of	O
Sun	O
Microsystems	O
.	O
</s>
<s>
At	O
the	O
heart	O
of	O
this	O
design	O
were	O
the	O
Multibus	B-Protocol
CPU	O
,	O
memory	O
,	O
and	O
video	O
display	O
cards	O
.	O
</s>
<s>
The	O
cards	O
used	O
in	O
the	O
Sun-1	B-Device
workstation	B-Device
were	O
a	O
second-generation	O
design	O
with	O
a	O
private	O
memory	O
bus	O
allowing	O
memory	O
to	O
be	O
expanded	O
to	O
2	O
MB	O
without	O
performance	O
degradation	O
.	O
</s>
<s>
The	O
Sun	O
68000	B-Device
board	O
introduced	O
in	O
1982	O
was	O
a	O
powerful	O
single-board	B-Device
computer	I-Device
.	O
</s>
<s>
It	O
combined	O
a	O
10MHz	O
Motorola	B-Device
68000	I-Device
microprocessor	I-Device
,	O
a	O
Sun-designed	O
memory	B-General_Concept
management	I-General_Concept
unit	I-General_Concept
(	O
MMU	O
)	O
,	O
256	O
KB	O
of	O
zero	B-General_Concept
wait	I-General_Concept
state	I-General_Concept
memory	O
with	O
parity	O
,	O
up	O
to	O
32	O
KB	O
of	O
EPROM	B-General_Concept
memory	O
,	O
two	O
serial	O
ports	O
,	O
a	O
16-bit	O
parallel	B-Device
port	I-Device
and	O
an	O
Intel	B-Protocol
Multibus	I-Protocol
(	O
IEEE	O
796	O
bus	O
)	O
interface	O
in	O
a	O
single	O
,	O
Multibus	B-Protocol
form	O
factor	O
.	O
</s>
<s>
By	O
using	O
the	O
Motorola	B-Device
68000	I-Device
processor	I-Device
tightly	O
coupled	O
with	O
the	O
Sun-1	B-Device
MMU	O
,	O
the	O
Sun	O
68000	B-Device
CPU	O
board	O
was	O
able	O
to	O
support	O
a	O
multi-tasking	O
operating	O
system	O
such	O
as	O
UNIX	B-Application
.	O
</s>
<s>
The	O
Sun-1	B-Device
MMU	O
was	O
necessary	O
because	O
the	O
Motorola	B-Device
68451	I-Device
MMU	O
did	O
not	O
always	O
work	O
correctly	O
with	O
the	O
68000	B-Device
and	O
could	O
not	O
always	O
restore	O
the	O
processor	O
state	O
after	O
a	O
page	O
fault	O
.	O
</s>
<s>
Although	O
the	O
memory	O
cards	O
used	O
the	O
Multibus	B-Protocol
form	O
factor	O
,	O
they	O
only	O
used	O
the	O
Multibus	B-Protocol
interface	O
for	O
power	O
;	O
all	O
memory	O
access	O
was	O
via	O
the	O
smaller	O
private	O
P2	O
bus	O
.	O
</s>
<s>
It	O
also	O
allowed	O
for	O
full	O
performance	O
zero	B-General_Concept
wait	I-General_Concept
state	I-General_Concept
operation	O
of	O
the	O
memory	O
.	O
</s>
<s>
On-board	O
I/O	O
included	O
a	O
dual	O
serial	O
port	O
UART	O
and	O
a	O
16-bit	O
parallel	B-Device
port	I-Device
.	O
</s>
<s>
Both	O
serial	O
ports	O
could	O
also	O
be	O
used	O
as	O
terminal	O
ports	O
allowing	O
three	O
people	O
to	O
use	O
one	O
workstation	B-Device
,	O
although	O
two	O
did	O
not	O
have	O
graphical	O
displays	O
.	O
</s>
<s>
The	O
16-bit	O
parallel	B-Device
port	I-Device
was	O
a	O
special-purpose	O
port	O
for	O
connecting	O
8-bit	O
parallel	B-Device
port	I-Device
keyboard	O
and	O
8-bit	O
parallel	B-Device
port	I-Device
optical	O
mouse	O
for	O
workstations	B-Device
with	O
graphical	O
displays	O
.	O
</s>
<s>
The	O
parallel	B-Device
port	I-Device
was	O
never	O
used	O
as	O
a	O
general	O
purpose	O
parallel	B-Device
printer	I-Device
port	I-Device
.	O
</s>
<s>
The	O
CPU	O
board	O
included	O
a	O
fully	O
compatible	O
Multibus	B-Protocol
(	O
IEEE	O
796	O
bus	O
)	O
.	O
</s>
<s>
It	O
had	O
20	O
address	O
lines	O
so	O
it	O
could	O
address	O
up	O
to	O
1	O
MB	O
of	O
Multibus	B-Protocol
memory	O
and	O
1MB	O
of	O
I/O	O
locations	O
although	O
most	O
I/O	O
devices	O
only	O
decoded	O
the	O
first	O
64	O
KB	O
of	O
address	O
space	O
.	O
</s>
<s>
The	O
Sun	O
CPU	O
board	O
fully	O
supported	O
multi-master	O
functionality	O
that	O
allowed	O
it	O
to	O
share	O
the	O
Multibus	B-Protocol
with	O
other	O
DMA	O
devices	O
.	O
</s>
<s>
The	O
memory-mapped	O
,	O
bit-mapped	O
frame	B-Algorithm
buffer	I-Algorithm
(	O
graphics	O
)	O
board	O
had	O
a	O
resolution	O
of	O
1024×1024	O
pixels	B-Algorithm
,	O
but	O
only	O
1024×800	O
was	O
displayed	O
on	O
the	O
monitor	O
.	O
</s>
<s>
An	O
Interphase	O
SMD	B-Architecture
2180	O
disk	O
controller	O
could	O
be	O
installed	O
to	O
connect	O
up	O
to	O
four	O
Fujitsu	O
84	O
MB	O
M2313K	O
or	O
CDC	O
16.7	O
MB	O
(	O
8.35	O
MB	O
fixed	O
,	O
8.35	O
MB	O
removable	O
)	O
9455	O
Lark	O
drives	O
.	O
</s>
<s>
All	O
of	O
the	O
boards	O
were	O
installed	O
in	O
a	O
6	O
-	O
or	O
7-slot	O
Multibus	B-Protocol
card	O
cage	O
.	O
</s>
<s>
The	O
color	O
frame	B-Algorithm
buffer	I-Algorithm
had	O
a	O
resolution	O
of	O
640×512	O
pixels	B-Algorithm
,	O
with	O
640×480	O
displayed	O
on	O
the	O
monitor	O
.	O
</s>
<s>
½-inch	O
9-track	B-Device
reel-to-reel	O
tape	O
drives	O
and	O
QIC-02	O
¼-inch	O
cartridge	O
tape	O
drives	O
were	O
also	O
added	O
to	O
the	O
offering	O
.	O
</s>
<s>
There	O
was	O
also	O
a	O
second	O
generation	O
Sun-1	B-Device
CPU	O
board	O
referred	O
to	O
as	O
the	O
Sun-1.5	O
CPU	O
board	O
.	O
</s>
<s>
Sun-1	B-Device
systems	O
upgraded	O
with	O
Sun-2	B-Device
Multibus	B-Protocol
CPU	O
boards	O
were	O
identified	O
with	O
a	O
U	O
suffix	O
to	O
their	O
model	O
number	O
.	O
</s>
