<s>
The	O
Atari	B-Device
TT030	I-Device
is	O
a	O
member	O
of	O
the	O
Atari	B-Device
ST	I-Device
family	O
,	O
released	O
in	O
1990	O
.	O
</s>
<s>
It	O
was	O
originally	O
intended	O
to	O
be	O
a	O
high-end	O
Unix	B-Device
workstation	I-Device
,	O
but	O
Atari	O
took	O
two	O
years	O
to	O
release	O
a	O
port	O
of	O
Unix	O
SVR4	O
for	O
the	O
TT	O
,	O
which	O
prevented	O
the	O
TT	O
from	O
ever	O
being	O
seriously	O
considered	O
in	O
its	O
intended	O
market	O
.	O
</s>
<s>
In	O
1992	O
,	O
the	O
TT	O
was	O
replaced	O
by	O
the	O
Atari	B-Device
Falcon	I-Device
,	O
a	O
low-cost	O
consumer-oriented	O
machine	O
with	O
greatly	O
improved	O
graphics	O
and	O
sound	O
capability	O
,	O
but	O
with	O
a	O
slower	O
and	O
severely	O
bottle-necked	O
CPU	O
.	O
</s>
<s>
Though	O
well	O
priced	O
for	O
a	O
workstation	B-Device
machine	O
,	O
the	O
TT	O
's	O
high	O
cost	O
kept	O
it	O
mostly	O
out	O
of	O
reach	O
of	O
the	O
existing	O
Atari	B-Device
ST	I-Device
market	O
until	O
after	O
the	O
TT	O
was	O
discontinued	O
and	O
sold	O
at	O
discount	O
.	O
</s>
<s>
Thanks	O
to	O
open	O
hardware	O
documentation	O
,	O
the	O
Atari	B-Device
TT	I-Device
,	O
along	O
with	O
the	O
Amiga	B-Device
and	O
Atari	B-Device
Falcon	I-Device
,	O
were	O
the	O
first	O
non-Intel	O
machines	O
to	O
have	O
Linux	B-Application
ported	O
to	O
them	O
,	O
though	O
this	O
work	O
did	O
not	O
stabilize	O
until	O
after	O
the	O
TT	O
had	O
already	O
been	O
discontinued	O
by	O
Atari	O
.	O
</s>
<s>
By	O
1995	O
NetBSD	B-Device
had	O
also	O
been	O
ported	O
to	O
the	O
Atari	B-Device
TT	I-Device
.	O
</s>
<s>
Atari	O
Corporation	O
realized	O
that	O
to	O
remain	O
competitive	O
as	O
a	O
computer	O
manufacturer	O
,	O
they	O
needed	O
to	O
begin	O
taking	O
steps	O
to	O
exploit	O
the	O
power	O
offered	O
by	O
more	O
advanced	O
processors	O
in	O
the	O
Motorola	B-Device
68000	I-Device
series	I-Device
.	O
</s>
<s>
At	O
that	O
time	O
,	O
the	O
highest	O
performance	O
member	O
was	O
the	O
68020	B-Device
.	O
</s>
<s>
Unlike	O
the	O
68000	O
used	O
in	O
the	O
original	O
STs	O
,	O
the	O
68020	B-Device
is	O
capable	O
of	O
fetching	O
a	O
32-bit	O
value	O
in	O
one	O
memory	O
cycle	O
,	O
while	O
the	O
older	O
STs	O
need	O
two	O
cycles	O
.	O
</s>
<s>
The	O
TT	O
was	O
initially	O
designed	O
around	O
the	O
68020	B-Device
CPU	O
,	O
but	O
as	O
the	O
project	O
progressed	O
,	O
Atari	O
Corp	O
.	O
realized	O
that	O
the	O
68020	B-Device
was	O
not	O
the	O
best	O
option	O
for	O
the	O
TT	O
.	O
</s>
<s>
The	O
68020	B-Device
still	O
lacked	O
some	O
features	O
offered	O
by	O
the	O
next	O
successor	O
in	O
the	O
68000	O
line	O
,	O
the	O
new	O
68030	B-Device
.	O
</s>
<s>
The	O
new	O
68030	B-Device
features	O
built-in	O
memory-management	O
hardware	O
that	O
provide	O
separate	O
Supervisor	O
,	O
User	O
,	O
Program	O
,	O
and	O
Data	O
virtual	B-Architecture
memory	I-Architecture
spaces	O
,	O
and	O
provides	O
a	O
256-byte	O
on-chip	O
data	B-General_Concept
cache	I-General_Concept
.	O
</s>
<s>
When	O
the	O
decision	O
was	O
made	O
to	O
switch	O
from	O
a	O
68020	B-Device
to	O
a	O
68030	B-Device
CPU	O
,	O
it	O
presented	O
a	O
whole	O
new	O
set	O
of	O
problems	O
.	O
</s>
<s>
To	O
make	O
the	O
system	O
work	O
with	O
a	O
32MHz	O
68030	B-Device
,	O
Atari	O
Corp	O
.	O
had	O
to	O
scale	O
back	O
their	O
plans	O
somewhat	O
,	O
and	O
add	O
a	O
large	O
amount	O
of	O
cache	B-General_Concept
to	O
the	O
system	O
.	O
</s>
<s>
This	O
is	O
similar	O
to	O
the	O
tactic	O
employed	O
by	O
Apple	O
with	O
the	O
ill-fated	O
Macintosh	B-Device
IIvx	I-Device
and	O
later	O
employed	O
by	O
makers	O
of	O
PCs	B-Device
with	O
an	O
Intel	B-Device
80486DX2	I-Device
CPU	O
which	O
runs	O
at	O
double	O
that	O
of	O
the	O
system	O
bus	O
speed	O
.	O
</s>
<s>
TOS	B-Application
3.01	O
is	O
the	O
operating	B-General_Concept
system	I-General_Concept
that	O
Atari	O
bundled	O
with	O
the	O
TT	O
.	O
</s>
<s>
Another	O
variant	O
,	O
known	O
as	O
TT/X	O
,	O
uses	O
Unix	B-Operating_System
System	I-Operating_System
V	I-Operating_System
R4	O
and	O
WISH	O
(	O
Motif	B-Application
extension	O
)	O
.	O
</s>
<s>
The	O
TT030	B-Device
was	O
first	O
introduced	O
at	O
CeBIT	O
in	O
Hannover	O
,	O
Germany	O
and	O
launched	O
in	O
1990	O
.	O
</s>
<s>
A	O
number	O
of	O
TT	O
machines	O
were	O
built	O
as	O
developer	O
systems	O
for	O
the	O
Jaguar	B-Device
.	O
</s>
<s>
For	O
example	O
,	O
an	O
AppleTalk	B-Application
network	O
port	O
(	O
there	O
never	O
was	O
a	O
driver	O
for	O
it	O
,	O
possibly	O
due	O
to	O
license	O
problems	O
)	O
,	O
VME	B-Architecture
expansion	O
bus	O
,	O
new	O
VGA	B-Protocol
video	O
graphics	O
modes	O
,	O
and	O
a	O
true	O
SCSI	B-Architecture
port	O
.	O
</s>
<s>
One	O
device	O
that	O
is	O
left	O
out	O
is	O
the	O
BLiTTER	B-General_Concept
graphics	O
chip	O
,	O
which	O
first	O
appeared	O
in	O
the	O
Atari	O
Mega	O
ST	O
systems	O
four	O
to	O
five	O
years	O
earlier	O
.	O
</s>
<s>
To	O
be	O
useful	O
,	O
a	O
new	O
32MHz	O
blitter	B-General_Concept
chip	I-General_Concept
would	O
have	O
had	O
to	O
have	O
been	O
designed	O
for	O
the	O
TT	O
,	O
however	O
Atari	O
chose	O
not	O
to	O
do	O
so	O
.	O
</s>
<s>
An	O
Atari	O
Corp	O
.	O
version	O
of	O
Unix	B-Operating_System
System	I-Operating_System
V	I-Operating_System
was	O
not	O
released	O
until	O
mid-1992	O
.	O
</s>
<s>
A	O
special	O
version	O
of	O
the	O
TT	O
,	O
the	O
TT/X	O
,	O
was	O
supplied	O
with	O
UNIX	B-Operating_System
System	I-Operating_System
V	I-Operating_System
R4	O
and	O
WISH	O
(	O
an	O
extension	O
of	O
OSF	O
Motif	B-Application
)	O
,	O
as	O
well	O
as	O
a	O
collection	O
of	O
free	B-Application
software	I-Application
utilities	O
including	O
GCC	B-Application
.	O
</s>
<s>
In	O
the	O
boot	O
screen	O
for	O
"	O
Atari	B-Device
System	I-Device
V	I-Device
"	O
,	O
as	O
the	O
manual	O
calls	O
it	O
,	O
the	O
operating	B-General_Concept
system	I-General_Concept
's	O
kernel	O
identifies	O
itself	O
as	O
"	O
UniSoft	B-Operating_System
UNIX	O
(	O
R	O
)	O
System	B-Operating_System
V	I-Operating_System
Release	I-Operating_System
4.0	I-Operating_System
.	O
</s>
<s>
Used	O
in	O
TT	O
and	O
MEGA	B-Device
STE	I-Device
.	O
</s>
<s>
DMA	O
"	O
Direct	O
Memory	O
Access	O
"	O
Three	O
independent	O
channels	O
,	O
one	O
for	O
floppy	B-Device
and	O
hard	O
drive	O
data	O
transfers	O
,	O
one	O
for	O
the	O
SCSI	B-Architecture
port	O
and	O
one	O
for	O
85C30	O
SCC	O
network	O
port	O
.	O
</s>
<s>
NCR	O
5380	O
"	O
SCSI	B-Architecture
Controller	O
"	O
8-bit	O
asynchronous	O
transfers	O
up	O
to	O
4	O
MB/s	O
.	O
</s>
<s>
WD-1772-PH	B-Device
"	O
Western	O
Digital	O
Floppy	B-Device
Disk	I-Device
Controller	O
"	O
Floppy	B-Device
controller	O
chip	O
.	O
</s>
<s>
Zilog	B-Device
85C30	I-Device
SCC	I-Device
"	O
Zilog	O
Serial	O
Communications	O
Controller	O
"	O
Two	O
high-speed	O
SDLC	O
serial	O
ports	O
.	O
</s>
<s>
YM2149F	B-Device
PSG	I-Device
"	O
Programmable	O
Sound	O
Generator	O
"	O
Provides	O
3-voice	O
sound	O
synthesis	O
,	O
also	O
used	O
for	O
floppy	B-Device
signalling	O
and	O
printer	O
port	O
.	O
</s>
<s>
Operating	B-General_Concept
System	I-General_Concept
:	O
</s>
<s>
Atari	O
's	O
TOS	B-Application
with	O
the	O
Graphics	B-Application
Environment	I-Application
Manager	I-Application
(	O
GEM	B-Application
)	O
graphical	B-Application
user	I-Application
interface	I-Application
(	O
GUI	B-Application
)	O
TOS	B-Application
versions	O
:	O
3.01	O
,	O
3.05	O
or	O
3.06	O
in	O
ROM	O
.	O
</s>
<s>
Character	O
set	O
:	O
Atari	B-Device
ST	I-Device
character	O
set	O
,	O
based	O
on	O
codepage	O
437	O
.	O
</s>
<s>
Hatari	B-Application
is	O
able	O
to	O
emulate	O
an	O
Atari	B-Device
TT	I-Device
on	O
a	O
variety	O
of	O
different	O
OS	B-General_Concept
's	I-General_Concept
using	O
the	O
SDL	B-Operating_System
library	I-Operating_System
.	O
</s>
