<s>
The	O
VT1000	B-Device
was	O
a	O
monochrome	O
X	B-Operating_System
Window	I-Operating_System
System	I-Operating_System
computer	B-General_Concept
terminal	I-General_Concept
introduced	O
by	O
Digital	O
Equipment	O
Corporation	O
(	O
DEC	O
)	O
in	O
April	O
1990	O
.	O
</s>
<s>
The	O
VT1200	O
replaced	O
the	O
VT1000	B-Device
later	O
that	O
year	O
,	O
consisting	O
of	O
a	O
code	O
update	O
and	O
a	O
bump	O
in	O
the	O
RAM	B-Architecture
from	O
1	O
to	O
2MB	O
.	O
</s>
<s>
All	O
of	O
the	O
VT1000	B-Device
series	O
communicated	O
with	O
their	O
host	O
computers	O
over	O
Ethernet	O
,	O
supporting	O
TCP/IP	B-Protocol
as	O
well	O
as	O
DEC	O
's	O
terminal-oriented	O
Local	B-General_Concept
Area	I-General_Concept
Transport	I-General_Concept
(	O
LAT	O
)	O
protocol	O
.	O
</s>
<s>
They	O
also	O
included	O
standard	O
serial	B-Protocol
ports	I-Protocol
to	O
allow	O
basic	O
terminal	B-Application
emulation	I-Application
,	O
built	O
into	O
the	O
ROM	B-Device
.	O
</s>
<s>
Apparently	O
unhappy	O
with	O
these	O
VT1000s	B-Device
,	O
DEC	O
released	O
the	O
VT1300	O
at	O
the	O
same	O
time	O
as	O
the	O
1200	O
.	O
</s>
<s>
This	O
was	O
essentially	O
a	O
cut-down	O
diskless	O
version	O
of	O
the	O
VAXstation	B-Device
3100	I-Device
Model	O
30	O
,	O
allowing	O
the	O
X	B-Operating_System
Windows	I-Operating_System
code	O
to	O
be	O
downloaded	O
from	O
the	O
host	O
system	O
.	O
</s>
<s>
An	O
upgraded	O
version	O
of	O
the	O
VT1300	O
that	O
allowed	O
the	O
host	O
to	O
download	O
programs	O
to	O
the	O
terminal	O
to	O
run	O
them	O
locally	O
was	O
the	O
VTX2000	O
,	O
a	O
concept	O
DEC	O
called	O
an	O
"	O
X	B-Operating_System
workstation	O
"	O
.	O
</s>
<s>
The	O
VT1000	B-Device
family	O
developed	O
out	O
of	O
a	O
1987	O
study	O
carried	O
out	O
by	O
DEC	O
's	O
VIPS	O
group	O
.	O
</s>
<s>
The	O
team	O
rejected	O
using	O
one	O
of	O
their	O
single-chip	O
VAX	B-Device
processors	O
due	O
to	O
high	O
cost	O
of	O
implementation	O
.	O
</s>
<s>
The	O
Motorola	B-Device
68000	I-Device
was	O
both	O
inexpensive	O
and	O
powerful	O
,	O
but	O
they	O
did	O
not	O
have	O
support	O
for	O
cross-compilers	O
and	O
other	O
development	O
support	O
systems	O
on	O
VMS	B-Operating_System
,	O
so	O
those	O
would	O
have	O
to	O
be	O
written	O
.	O
</s>
<s>
Considering	O
this	O
,	O
the	O
team	O
ultimately	O
chose	O
the	O
Texas	O
Instruments	O
TMS34010	B-General_Concept
,	O
a	O
design	O
that	O
combined	O
a	O
32-bit	O
CPU	B-General_Concept
with	O
additional	O
instructions	O
for	O
handling	O
common	O
2D	O
graphics	O
tasks	O
and	O
bit	O
handling	O
.	O
</s>
<s>
The	O
TMS34010	B-General_Concept
blended	O
the	O
roles	O
of	O
CPU	B-General_Concept
and	O
GPU	B-Architecture
,	O
lowering	O
the	O
cost	O
of	O
implementing	O
a	O
complete	O
graphical	O
terminal	O
.	O
</s>
<s>
Having	O
experimented	O
with	O
an	O
X	B-Operating_System
Server	O
on	O
the	O
VAXstation	B-Device
2000	I-Device
,	O
the	O
team	O
concluded	O
that	O
serial	O
links	O
would	O
not	O
be	O
fast	O
enough	O
to	O
support	O
X	B-Operating_System
Windows	I-Operating_System
,	O
and	O
made	O
the	O
decision	O
to	O
equip	O
the	O
design	O
with	O
Ethernet	O
as	O
its	O
primary	O
communications	O
system	O
.	O
</s>
<s>
Studying	O
the	O
system	O
throughput	O
as	O
a	O
whole	O
,	O
they	O
estimated	O
that	O
the	O
resulting	O
system	O
would	O
not	O
be	O
terribly	O
fast	O
,	O
but	O
would	O
be	O
faster	O
than	O
an	O
X	B-Operating_System
Server	O
running	O
on	O
the	O
VAXstation	B-Device
2000	I-Device
,	O
which	O
was	O
considered	O
barely	O
usable	O
.	O
</s>
<s>
Some	O
consideration	O
was	O
given	O
to	O
equipping	O
it	O
with	O
both	O
the	O
TMS34010	B-General_Concept
to	O
handle	O
graphics	O
and	O
a	O
68000	B-Device
for	O
other	O
tasks	O
,	O
but	O
the	O
team	O
was	O
unable	O
to	O
find	O
a	O
way	O
to	O
balance	O
the	O
loads	O
so	O
that	O
one	O
or	O
the	O
other	O
processor	O
did	O
n't	O
end	O
up	O
underutilized	O
.	O
</s>
<s>
The	O
team	O
decided	O
early	O
on	O
to	O
use	O
a	O
custom	O
operating	B-General_Concept
system	I-General_Concept
developed	O
for	O
another	O
project	O
,	O
and	O
debated	O
whether	O
to	O
include	O
that	O
in	O
ROM	B-Device
or	O
have	O
the	O
code	O
be	O
downloaded	O
from	O
the	O
host	O
through	O
a	O
boot	O
mechanism	O
.	O
</s>
<s>
Using	O
ROM	B-Device
would	O
eliminate	O
the	O
long	O
network	O
boot	O
process	O
,	O
but	O
also	O
mean	O
that	O
minor	O
fixes	O
and	O
upgrades	O
would	O
be	O
difficult	O
.	O
</s>
<s>
For	O
performance	O
reasons	O
,	O
they	O
chose	O
to	O
include	O
the	O
OS	O
on	O
ROM	B-Device
,	O
using	O
a	O
small	O
plug-in	O
card	O
that	O
could	O
be	O
swapped	O
out	O
.	O
</s>
<s>
Other	O
parts	O
of	O
the	O
system	O
,	O
like	O
the	O
fonts	O
,	O
are	O
downloaded	O
from	O
the	O
host	O
to	O
save	O
room	O
in	O
the	O
ROM	B-Device
.	O
</s>
<s>
It	O
was	O
desirable	O
to	O
have	O
the	O
system	O
be	O
able	O
to	O
do	O
local	O
setup	O
and	O
terminal	B-Application
emulation	I-Application
even	O
when	O
not	O
connected	O
to	O
a	O
host	O
computer	O
,	O
which	O
led	O
to	O
the	O
requirement	O
for	O
a	O
basic	O
user	B-Application
interface	I-Application
similar	O
to	O
BIOS	B-Operating_System
that	O
allowed	O
it	O
to	O
be	O
set	O
up	O
and	O
handle	O
connections	O
to	O
hosts	O
using	O
X	B-Operating_System
windows	I-Operating_System
.	O
</s>
<s>
In	O
X	B-Operating_System
windows	I-Operating_System
,	O
this	O
requires	O
the	O
machine	O
to	O
have	O
both	O
the	O
X	B-Operating_System
Server	O
,	O
the	O
software	O
that	O
draws	O
the	O
display	O
,	O
as	O
well	O
as	O
the	O
X	B-Operating_System
Client	O
,	O
an	O
application	O
calling	O
the	O
Xlib	O
code	O
to	O
send	O
drawing	O
commands	O
to	O
the	O
server	O
.	O
</s>
<s>
DEC	O
had	O
such	O
a	O
system	O
as	O
part	O
of	O
their	O
DECwindows	B-Application
system	O
,	O
but	O
this	O
was	O
tightly	O
tied	O
to	O
VMS	B-Operating_System
,	O
requiring	O
a	O
port	O
of	O
MIT	O
's	O
Xlib	O
to	O
the	O
TMS34020	O
platform	O
.	O
</s>
<s>
A	O
terminal	B-Application
emulator	I-Application
providing	O
support	O
for	O
VT52	B-Application
,	O
VT100	B-Device
,	O
VT220	B-Device
and	O
VT320	B-Application
terminals	O
was	O
included	O
in	O
the	O
ROM	B-Device
,	O
using	O
the	O
local	O
window	O
manager	O
for	O
display	O
.	O
</s>
<s>
This	O
led	O
to	O
continual	O
ROM	B-Device
updates	O
,	O
causing	O
considerable	O
problems	O
.	O
</s>
<s>
This	O
led	O
to	O
increasing	O
interest	O
in	O
a	O
RAM-based	O
machine	O
that	O
booted	O
from	O
the	O
network	O
,	O
reversing	O
their	O
earlier	O
decision	O
.	O
</s>
<s>
In	O
1989	O
development	O
along	O
these	O
lines	O
started	O
using	O
the	O
VAXstation	B-Device
3100	I-Device
with	O
the	O
hard	B-Device
drive	I-Device
and	O
other	O
components	O
removed	O
,	O
running	O
the	O
VAXELN	B-Operating_System
operating	B-General_Concept
system	I-General_Concept
and	O
EWS	O
(	O
X11	B-Operating_System
for	O
VAXELN	B-Operating_System
)	O
.	O
</s>
<s>
As	O
the	O
system	O
could	O
only	O
be	O
used	O
with	O
a	O
host	O
computer	O
,	O
there	O
was	O
no	O
local	O
user	B-Application
interface	I-Application
.	O
</s>
<s>
The	O
VT1000	B-Device
and	O
VT1200	O
was	O
packaged	O
in	O
a	O
pizza	B-General_Concept
box	I-General_Concept
case	I-General_Concept
with	O
the	O
monitor	O
normally	O
sitting	O
on	O
top	O
and	O
an	O
LK400	O
series	O
keyboard	O
connected	O
to	O
it	O
using	O
a	O
coiled	O
cord	O
and	O
4-pin	O
modular	B-Architecture
connector	I-Architecture
.	O
</s>
<s>
The	O
three-button	O
mouse	O
was	O
roughly	O
puck-shaped	O
,	O
not	O
unlike	O
the	O
original	O
iMac	B-Device
mouse	O
,	O
and	O
used	O
a	O
custom	O
7-pin	O
round	O
connector	O
.	O
</s>
<s>
The	O
back	O
panel	O
included	O
a	O
coax	O
connector	O
for	O
the	O
monitor	O
,	O
mouse	O
and	O
keyboard	O
ports	O
,	O
a	O
Modified	B-Device
Modular	I-Device
Jack	I-Device
(	O
MMJ	O
)	O
serial	B-Protocol
port	I-Protocol
for	O
a	O
printer	O
,	O
another	O
MMJ	O
serial	B-Protocol
port	I-Protocol
for	O
host	O
connections	O
,	O
and	O
a	O
thinwire	O
Ethernet	O
connector	O
.	O
</s>
<s>
In	O
addition	O
to	O
X	B-Operating_System
Window	I-Operating_System
support	O
,	O
the	O
VT1000	B-Device
and	O
VT1200	O
could	O
also	O
emulate	O
DEC	O
's	O
previous	O
text	O
terminals	O
in	O
individual	O
windows	O
,	O
including	O
support	O
for	O
the	O
VT52	B-Application
,	O
VT100	B-Device
,	O
VT220	B-Device
and	O
VT320	B-Application
.	O
</s>
<s>
The	O
basic	O
model	O
shipped	O
with	O
a	O
15-inch	O
CRT	B-Device
monitor	I-Device
and	O
cost	O
$2	O
,	O
895	O
,	O
but	O
could	O
be	O
upgraded	O
to	O
a	O
19-inch	O
display	O
for	O
an	O
additional	O
$700	O
,	O
or	O
a	O
19-inch	O
flat-screen	O
electroluminescent	O
display	O
for	O
an	O
additional	O
$	O
11,100	O
.	O
</s>
<s>
They	O
shipped	O
with	O
1MB	O
of	O
RAM	B-Architecture
,	O
but	O
could	O
be	O
upgraded	O
to	O
4MB	O
for	O
$600	O
per	O
megabyte	O
.	O
</s>
<s>
The	O
VT1000	B-Device
was	O
replaced	O
by	O
the	O
VT1200	O
in	O
the	O
fall	O
of	O
1991	O
.	O
</s>
<s>
The	O
VT1300	O
was	O
packaged	O
into	O
a	O
much	O
larger	O
case	O
,	O
about	O
the	O
size	O
of	O
a	O
contemporary	O
full-sized	O
IBM	B-Device
PC	I-Device
although	O
somewhat	O
shorter	O
vertically	O
.	O
</s>
<s>
It	O
was	O
released	O
at	O
$	O
7,495	O
with	O
9MB	O
of	O
RAM	B-Architecture
and	O
a	O
19-inch	O
color	O
monitor	O
.	O
</s>
