<s>
The	O
Amiga	B-Device
3000	I-Device
,	O
or	O
A3000	O
,	O
is	O
a	O
personal	O
computer	O
released	O
by	O
Commodore	O
in	O
June	O
1990	O
.	O
</s>
<s>
It	O
is	O
the	O
successor	O
to	O
the	O
Amiga	B-Device
2000	I-Device
with	O
more	O
processing	O
speed	O
,	O
improved	O
graphics	O
,	O
and	O
a	O
new	O
revision	O
of	O
the	O
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
Its	O
predecessors	O
,	O
the	O
Amiga	B-Device
500	I-Device
,	O
1000	B-Device
and	O
2000	B-Device
,	O
share	O
the	O
same	O
fundamental	O
system	O
architecture	O
and	O
consequently	O
perform	O
without	O
much	O
variation	O
in	O
processing	O
speed	O
despite	O
considerable	O
variation	O
in	O
purchase	O
price	O
.	O
</s>
<s>
The	O
new	O
Motorola	O
32-bit	O
68030	B-Device
CPU	O
,	O
68882	B-General_Concept
math	O
co-processor	O
,	O
and	O
32-bit	O
system	O
memory	O
increase	O
the	O
integer	O
processing	O
speed	O
by	O
a	O
factor	O
of	O
5	O
to	O
18	O
,	O
and	O
the	O
floating-point	O
processing	O
speed	O
by	O
a	O
factor	O
of	O
7	O
to	O
200	O
times	O
.	O
</s>
<s>
The	O
new	O
32-bit	O
Zorro	B-Device
III	I-Device
expansion	B-Device
slots	I-Device
provide	O
for	O
faster	O
and	O
more	O
powerful	O
expansion	O
capabilities	O
.	O
</s>
<s>
In	O
common	O
with	O
earlier	O
Amigas	B-Device
the	O
3000	O
runs	O
a	O
32-bit	O
operating	B-General_Concept
system	I-General_Concept
called	O
AmigaOS	B-Application
.	O
</s>
<s>
The	O
A3000UX	B-Device
is	O
an	O
A3000	O
variant	O
bundled	O
with	O
the	O
UNIX	B-Operating_System
System	I-Operating_System
V	I-Operating_System
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
Commodore	O
had	O
a	O
licensing	O
agreement	O
with	O
AT&T	O
to	O
include	O
a	O
port	O
of	O
Unix	B-Operating_System
System	I-Operating_System
V	I-Operating_System
(	O
release	O
4	O
)	O
.	O
</s>
<s>
Commodore	O
also	O
sold	O
a	O
tower	B-General_Concept
variant	O
called	O
the	O
A3000T	B-Device
.	O
</s>
<s>
An	O
enhanced	O
version	O
,	O
the	O
Amiga	O
3000+	O
,	O
with	O
the	O
AGA	B-Device
chipset	O
and	O
an	O
AT&T	O
DSP3210	O
signal	B-Architecture
processing	I-Architecture
chip	O
was	O
produced	O
to	O
prototype	O
stage	O
in	O
1991	O
.	O
</s>
<s>
Although	O
this	O
system	O
was	O
never	O
released	O
,	O
Commodore	O
's	O
negotiations	O
with	O
AT&T	O
over	O
the	O
proper	O
way	O
to	O
bundle	O
their	O
VCOS/VCAS	O
operating	B-General_Concept
system	I-General_Concept
software	O
in	O
a	O
personal	O
computer	O
environment	O
helped	O
Apple	O
Computer	O
deliver	O
their	O
Quadra	B-Device
660	I-Device
and	O
Quadra	O
840	O
AV-series	O
Macintosh	O
systems	O
,	O
two	O
years	O
later	O
.	O
</s>
<s>
Instead	O
of	O
the	O
Amiga	O
3000+	O
,	O
Commodore	O
replaced	O
the	O
A3000	O
six	O
months	O
behind	O
schedule	O
,	O
in	O
the	O
fall	O
of	O
1992	O
,	O
with	O
the	O
A4000	B-Device
.	O
</s>
<s>
The	O
Amiga	B-Device
3000	I-Device
shipped	O
with	O
a	O
Motorola	B-Device
68030	I-Device
at	O
either	O
16	O
or	O
25MHz	O
and	O
2MB	O
of	O
RAM	B-Architecture
.	O
</s>
<s>
It	O
includes	O
the	O
Enhanced	B-Device
Chip	I-Device
Set	I-Device
(	O
ECS	O
)	O
,	O
a	O
display	O
enhancer	O
for	O
use	O
with	O
a	O
VGA	B-Protocol
monitor	I-Protocol
,	O
and	O
a	O
DMA	B-General_Concept
SCSI-II	B-Architecture
controller	O
and	O
hard	B-Device
disk	I-Device
drive	I-Device
.	O
</s>
<s>
"	O
Fast	B-Device
RAM	I-Device
"	O
can	O
be	O
increased	O
by	O
fitting	O
DIP	B-Algorithm
(	O
up	O
to	O
4MB	O
)	O
or	O
ZIP	B-Algorithm
DRAM	O
chips	O
(	O
up	O
to	O
16MB	O
)	O
available	O
in	O
two	O
varieties	O
,	O
Page	O
Mode	O
or	O
Static	O
Column	O
.	O
</s>
<s>
The	O
A3000	O
,	O
unlike	O
most	O
Amiga	B-Device
models	I-Device
,	O
supports	O
both	O
ROM-based	O
Kickstarts	B-Device
and	O
disk-based	O
Kickstarts	B-Device
(	O
the	O
early	O
"	O
SuperKickstart	O
"	O
model	O
)	O
,	O
although	O
not	O
simultaneously	O
.	O
</s>
<s>
Kickstart	B-Device
V1.4	O
is	O
actually	O
a	O
beta	O
version	O
of	O
Kickstart	B-Device
which	O
is	O
loaded	O
from	O
disk	O
.	O
</s>
<s>
The	O
A3000	O
has	O
a	O
number	O
of	O
Amiga-specific	O
connectors	O
including	O
two	O
DE-9	B-Protocol
ports	O
for	O
joysticks	B-Device
,	O
mice	B-Device
,	O
and	O
light	B-Device
pens	I-Device
,	O
a	O
standard	O
25-pin	O
RS-232	O
serial	B-Protocol
port	I-Protocol
and	O
a	O
25-pin	O
Centronics	O
parallel	B-Device
port	I-Device
.	O
</s>
<s>
As	O
a	O
result	O
,	O
at	O
launch	O
the	O
A3000	O
was	O
compatible	O
with	O
many	O
existing	O
Amiga	B-Device
peripherals	O
,	O
such	O
as	O
MIDI	O
devices	O
,	O
serial	O
modems	B-Application
,	O
and	O
sound	B-Algorithm
samplers	I-Algorithm
.	O
</s>
<s>
The	O
A3000	O
has	O
four	O
internal	O
32-bit	O
Zorro	B-Device
III	I-Device
expansion	B-Device
slots	I-Device
.	O
</s>
<s>
This	O
expansion	B-Device
bus	I-Device
allows	O
the	O
use	O
of	O
devices	O
which	O
comply	O
with	O
the	O
AutoConfig	B-Device
standard	O
,	O
such	O
as	O
graphic	O
cards	O
,	O
audio	O
cards	O
,	O
network	O
cards	O
,	O
and	O
later	O
even	O
USB	B-Protocol
controllers	O
.	O
</s>
<s>
The	O
two	O
passive	O
ISA	B-Architecture
slots	I-Architecture
can	O
be	O
activated	O
by	O
use	O
of	O
a	O
bridgeboard	O
,	O
which	O
connects	O
the	O
Zorro	O
and	O
ISA	B-Architecture
buses	O
.	O
</s>
<s>
Such	O
bridgeboards	O
typically	O
feature	O
on-board	O
IBM-PC-compatible	O
hardware	O
,	O
including	O
Intel	B-General_Concept
80286	I-General_Concept
,	O
80386	B-General_Concept
or	O
80486	B-General_Concept
microprocessors	O
allowing	O
emulation	O
of	O
an	O
entire	O
IBMPC	O
system	O
in	O
hardware	O
.	O
</s>
<s>
A	O
compatible	O
ISA	B-Architecture
card	I-Architecture
may	O
then	O
be	O
installed	O
in	O
the	O
remaining	O
ISA	B-Architecture
slot	I-Architecture
.	O
</s>
