<s>
Z-2	O
is	O
a	O
series	O
of	O
microcomputers	B-Architecture
made	O
by	O
Cromemco	O
,	O
Inc	O
.	O
which	O
were	O
introduced	O
to	O
the	O
market	O
in	O
the	O
middle	O
to	O
late	O
1970s	O
.	O
</s>
<s>
They	O
were	O
S-100	B-Architecture
bus	I-Architecture
machines	O
powered	O
by	O
the	O
Zilog	B-General_Concept
Z80	I-General_Concept
processor	O
and	O
typically	O
ran	O
on	O
the	O
CP/M	B-Application
operating	I-Application
system	I-Application
.	O
</s>
<s>
The	O
Z-2	O
was	O
a	O
Z80	B-General_Concept
–	O
based	O
microcomputer	B-Architecture
system	O
that	O
was	O
introduced	O
in	O
1977	O
.	O
</s>
<s>
The	O
original	O
Z-2	O
in	O
kit	O
form	O
included	O
a	O
ZPU-K	O
Z80	B-General_Concept
CPU	O
card	O
,	O
S-100	B-Architecture
bus	I-Architecture
motherboard	B-Device
,	O
all-metal	O
rack-mount	O
chassis	O
and	O
dust	O
case	O
,	O
card	O
socket	O
and	O
card	O
guide	O
;	O
the	O
assembled	O
form	O
included	O
a	O
complete	O
set	O
of	O
sockets	O
and	O
card	O
guides	O
,	O
and	O
a	O
cooling	O
fan	O
.	O
</s>
<s>
A	O
TU-ART	O
(	O
dual	O
serial	O
and	O
parallel	O
board	O
)	O
,	O
4FDC	B-Device
Floppy	I-Device
Disk	I-Device
Controller	I-Device
,	O
one	O
or	O
more	O
16KZRAM	O
cards	O
,	O
and	O
a	O
Wangco	O
5¼	O
"	O
floppy	B-Device
disk	I-Device
drive	I-Device
would	O
be	O
added	O
to	O
form	O
a	O
basic	O
system	O
.	O
</s>
<s>
However	O
,	O
the	O
16KZ	O
memory	O
card	O
supported	O
bank-switching	B-General_Concept
with	O
8	O
banks	O
of	O
64	O
kilobytes	O
each	O
.	O
</s>
<s>
Communication	O
with	O
the	O
processor	O
was	O
normally	O
performed	O
through	O
a	O
TU-ART	O
or	O
other	O
S-100	B-Architecture
bus	I-Architecture
compatible	O
interface	O
card	O
,	O
which	O
could	O
run	O
a	O
CRT	O
terminal	O
or	O
teletype	O
.	O
</s>
<s>
The	O
Cromemco	O
Z-2D	O
computer	O
was	O
a	O
Z80	B-General_Concept
–	O
based	O
microcomputer	B-Architecture
system	O
which	O
differed	O
from	O
a	O
Z-2	O
by	O
having	O
one	O
or	O
two	O
Wangco	O
5¼	O
"	O
disk	O
drives	O
,	O
a	O
disk	O
power	O
supply	O
and	O
a	O
4FDC	O
disk	O
controller	O
in	O
a	O
Z-2	O
chassis	O
.	O
</s>
<s>
The	O
Chicago	O
Mercantile	O
Exchange	O
(	O
CME	O
)	O
adopted	O
Cromemco	B-Architecture
Z-2	I-Architecture
microcomputers	B-Architecture
as	O
the	O
backbone	O
of	O
the	O
CME	O
trading	O
floor	O
,	O
employing	O
a	O
total	O
of	O
60	O
Z-2	O
systems	O
.	O
</s>
<s>
In	O
1979	O
the	O
United	O
States	O
Navy	O
(	O
at	O
the	O
Applied	O
Physics	O
Laboratory	O
)	O
used	O
a	O
Cromemco	B-Architecture
Z-2	I-Architecture
computer	O
to	O
generate	O
speech	O
output	O
for	O
the	O
Aegis	B-Application
Combat	I-Application
System	I-Application
in	O
the	O
Combat	O
Information	O
Center	O
.	O
</s>
<s>
During	O
this	O
period	O
Cromemco	O
systems	O
were	O
used	O
for	O
the	O
planning	O
of	O
every	O
combat	O
mission	O
for	O
these	O
aircraft	O
,	O
including	O
missions	O
during	O
the	O
First	B-Application
Gulf	I-Application
War	I-Application
.	O
</s>
<s>
These	O
systems	O
were	O
based	O
on	O
the	O
Cromemco	B-Architecture
Z-2	I-Architecture
computer	O
,	O
but	O
utilized	O
the	O
Motorola	B-Device
68020	I-Device
32-bit	O
processor	O
,	O
and	O
had	O
a	O
custom	O
,	O
removable	O
hard	O
drive	O
to	O
meet	O
the	O
Air	O
Force	O
need	O
to	O
be	O
able	O
to	O
physically	O
secure	O
all	O
flight	O
plan	O
information	O
.	O
</s>
