<s>
The	O
Amiga	B-Device
4000T	I-Device
,	O
also	O
known	O
as	O
A4000T	B-Device
,	O
is	O
a	O
tower	B-General_Concept
version	O
of	O
Commodore	O
's	O
A4000	B-Device
personal	B-Device
computer	I-Device
.	O
</s>
<s>
Using	O
the	O
AGA	B-Device
chipset	O
,	O
it	O
was	O
originally	O
released	O
in	O
small	O
quantities	O
in	O
1994	O
with	O
a	O
25MHz	O
Motorola	B-Device
68040	I-Device
CPU	B-Device
,	O
and	O
re-released	O
in	O
greater	O
numbers	O
by	O
Escom	O
in	O
1995	O
,	O
after	O
Commodore	O
's	O
demise	O
,	O
along	O
with	O
a	O
new	O
variant	O
which	O
featured	O
a	O
50MHz	O
Motorola	B-General_Concept
68060	I-General_Concept
CPU	B-Device
.	O
</s>
<s>
Despite	O
the	O
subsequent	O
demise	O
of	O
Escom	O
,	O
production	O
was	O
continued	O
by	O
QuikPak	O
in	O
North	O
America	O
into	O
at	B-Device
least	O
1997	O
.	O
</s>
<s>
The	O
A4000T	B-Device
was	O
the	O
only	O
Amiga	B-Device
ever	O
to	O
have	O
both	O
SCSI	B-Architecture
and	O
IDE	B-Protocol
interfaces	O
built-in	O
on	O
the	O
motherboard	O
.	O
</s>
<s>
Having	O
driver	O
software	O
for	O
both	O
interfaces	O
in	O
the	O
512	O
KB	O
ROM	B-Device
meant	O
that	O
some	O
other	O
parts	O
of	O
AmigaOS	B-Application
had	O
to	O
be	O
moved	O
from	O
the	O
ROM	B-Device
,	O
and	O
thus	O
the	O
A4000T	B-Device
was	O
the	O
only	O
machine	O
to	O
require	O
the	O
file	O
"	O
workbench.library	O
"	O
to	O
be	O
stored	O
on	O
disk	O
(	O
this	O
has	O
changed	O
,	O
though	O
,	O
with	O
the	O
introduction	O
of	O
AmigaOS3.2	O
and	O
kickstart	B-Device
3.2	O
,	O
which	O
too	O
require	O
workbench.library	O
(	O
and	O
icon.library	O
)	O
to	O
be	O
stored	O
on	O
disk	O
)	O
.	O
</s>
<s>
It	O
was	O
also	O
the	O
only	O
Amiga	B-Device
to	O
use	O
a	O
PC	O
form	O
factor	O
for	O
the	O
motherboard	O
(	O
AT	B-Device
)	O
,	O
and	O
one	O
of	O
the	O
few	O
to	O
use	O
a	O
lithium	O
battery	O
instead	O
of	O
a	O
nickel	O
–	O
cadmium	O
rechargeable	O
battery	O
,	O
vastly	O
reducing	O
the	O
risk	O
of	O
leaking	O
corrosive	O
fluids	O
onto	O
the	O
motherboard	O
and	O
causing	O
damage	O
with	O
age	O
.	O
</s>
<s>
Modularity	O
was	O
another	O
unique	O
aspect	O
to	O
the	O
machine	O
,	O
with	O
the	O
CPU	B-Device
,	O
audio	O
,	O
video	O
,	O
and	O
input-output	O
ports	O
all	O
on	O
separate	O
daughterboards	O
.	O
</s>
<s>
The	O
machine	O
was	O
targeted	O
as	O
a	O
high-end	O
video	O
workstation	O
with	O
expandability	O
in	O
mind	O
and	O
an	O
eye	O
towards	O
NewTek	O
's	O
Video	B-Device
Toaster	I-Device
.	O
</s>
<s>
Its	O
motherboard	O
contains	O
two	O
Amiga	B-Device
Video	O
Slots	O
,	O
five	O
100-pin	O
Zorro	B-Device
III	I-Device
slots	O
,	O
and	O
4	O
ISA	B-Architecture
slots	I-Architecture
,	O
and	O
its	O
case	O
can	O
accommodate	O
up	O
to	O
six	O
drives	O
.	O
</s>
<s>
Up	O
to	O
16	O
MB	O
of	O
RAM	O
can	O
be	O
installed	O
on	O
the	O
motherboard	O
,	O
while	O
additional	O
RAM	O
can	O
be	O
installed	O
on	O
some	O
CPU	B-Device
boards	O
(	O
up	O
to	O
128	O
MB	O
)	O
,	O
and	O
yet	O
more	O
can	O
be	O
added	O
on	O
Zorro	O
cards	O
.	O
</s>
<s>
It	O
is	O
estimated	O
that	O
only	O
200	O
Commodore-branded	O
A4000Ts	B-Device
were	O
produced	O
before	O
the	O
company	O
folded	O
.	O
</s>
<s>
Production	O
of	O
the	O
A4000T	B-Device
was	O
restarted	O
after	O
Escom	O
bought	O
the	O
Amiga	B-Device
assets	O
.	O
</s>
<s>
Apart	O
from	O
the	O
new	O
option	O
of	O
a	O
68060	B-General_Concept
CPU	B-Device
,	O
the	O
Escom-manufactured	O
4000Ts	O
had	O
minor	O
differences	O
from	O
the	O
old	O
one	O
including	O
the	O
substitution	O
of	O
the	O
high	O
density	O
floppy	B-Device
drive	I-Device
with	O
a	O
double	O
density	O
one	O
,	O
and	O
a	O
different	O
front	O
bezel	O
on	O
the	O
case	O
.	O
</s>
<s>
CPU	B-Device
:	O
</s>
