<s>
The	O
Macintosh	B-Device
IIci	I-Device
is	O
a	O
personal	B-Device
computer	I-Device
designed	O
,	O
manufactured	O
,	O
and	O
sold	O
by	O
Apple	O
Computer	O
,	O
Inc	O
.	O
from	O
September	O
1989	O
to	O
February	O
1993	O
.	O
</s>
<s>
It	O
is	O
a	O
more	O
powerful	O
version	O
of	O
the	O
Macintosh	B-Device
IIcx	I-Device
,	O
released	O
earlier	O
that	O
year	O
,	O
and	O
shares	O
the	O
same	O
compact	O
case	O
design	O
.	O
</s>
<s>
With	O
three	O
NuBus	B-Device
expansion	B-Device
slots	I-Device
and	O
a	O
Processor	B-Device
Direct	I-Device
Slot	I-Device
,	O
the	O
IIci	B-Device
also	O
improved	O
upon	O
the	O
IIcx	O
's	O
16	O
MHz	O
Motorola	B-Device
68030	I-Device
CPU	B-General_Concept
and	O
68882	B-General_Concept
FPU	B-General_Concept
,	O
replacing	O
them	O
with	O
25MHz	O
versions	O
of	O
these	O
chips	O
.	O
</s>
<s>
The	O
Macintosh	B-Device
Quadra	I-Device
700	I-Device
was	O
introduced	O
at	O
the	O
end	O
of	O
1991	O
as	O
Apple	O
's	O
mainstream	O
workstation	O
product	O
to	O
replace	O
the	O
IIci	B-Device
,	O
albeit	O
at	O
a	O
significantly	O
higher	O
price	O
point	O
:	O
by	O
this	O
time	O
,	O
Apple	O
authorized	O
resellers	O
were	O
offering	O
entry-level	O
IIci	B-Device
systems	O
for	O
US$	O
4,000	O
or	O
less	O
,	O
whereas	O
the	O
Quadra	B-Device
700	I-Device
entered	O
the	O
market	O
above	O
US$	O
6,000	O
.	O
</s>
<s>
Because	O
of	O
this	O
,	O
Apple	O
continued	O
to	O
sell	O
the	O
IIci	B-Device
until	O
early	O
1993	O
when	O
the	O
less	O
expensive	O
Quadra	B-Device
650	I-Device
and	O
comparably-priced	O
Quadra	B-Device
800	I-Device
were	O
introduced	O
.	O
</s>
<s>
The	O
IIci	B-Device
introduced	O
several	O
technical	O
and	O
architectural	O
enhancements	O
,	O
some	O
of	O
which	O
were	O
important	O
in	O
preparing	O
for	O
System	B-Operating_System
7	I-Operating_System
(	O
which	O
was	O
then	O
called	O
the	O
Blue	O
project	O
)	O
and	O
would	O
influence	O
future	O
Macintoshes	O
,	O
though	O
some	O
of	O
them	O
came	O
at	O
the	O
cost	O
of	O
compatibility	O
:	O
</s>
<s>
a	O
new	O
,	O
32-bit	O
clean	O
ROM	B-Device
with	O
built-in	O
32-bit	O
QuickDraw	O
that	O
consists	O
of	O
two	O
parts	O
:	O
one	O
part	O
that	O
is	O
the	O
same	O
across	O
all	O
Macintoshes	O
,	O
and	O
another	O
area	O
(	O
called	O
the	O
overpatch	O
area	O
)	O
that	O
is	O
specific	O
to	O
each	O
Macintosh	O
.	O
</s>
<s>
Some	O
of	O
the	O
System	B-Operating_System
7	I-Operating_System
virtual	O
memory	O
functions	O
had	O
to	O
be	O
added	O
to	O
the	O
ROM	B-Device
to	O
support	O
getting	O
the	O
physical	O
address	O
of	O
the	O
memory	O
.	O
</s>
<s>
an	O
optional	O
32	O
KB	O
Level	O
2	O
cache	B-General_Concept
.	O
</s>
<s>
The	O
cache	B-General_Concept
card	O
,	O
which	O
fit	O
into	O
the	O
Processor	B-Device
Direct	I-Device
Slot	I-Device
(	O
initially	O
called	O
a	O
"	O
cache	B-General_Concept
connector	O
"	O
by	O
Apple	O
)	O
,	O
was	O
later	O
included	O
in	O
all	O
systems	O
at	O
no	O
charge	O
.	O
</s>
<s>
Third-party	O
cards	O
offered	O
up	O
to	O
128	O
KB	O
,	O
but	O
the	O
added	O
cache	B-General_Concept
size	O
yielded	O
little	O
benefit	O
over	O
the	O
base	O
card	O
.	O
</s>
<s>
This	O
freed	O
one	O
of	O
the	O
system	O
's	O
three	O
NuBus	B-Device
slots	O
.	O
</s>
<s>
However	O
,	O
because	O
the	O
integrated	O
graphics	O
used	O
the	O
system	O
's	O
RAM	O
for	O
its	O
frame	B-Algorithm
buffer	I-Algorithm
,	O
some	O
users	O
used	O
a	O
NuBus	B-Device
graphics	O
card	O
to	O
reclaim	O
the	O
lost	O
memory	O
.	O
</s>
<s>
Also	O
,	O
it	O
was	O
popular	O
to	O
install	O
faster	O
memory	O
in	O
the	O
first	O
bank	O
of	O
SIMM	B-General_Concept
slots	O
,	O
as	O
this	O
is	O
the	O
bank	O
used	O
by	O
the	O
video	O
subsystem	O
.	O
</s>
<s>
The	O
IIci	B-Device
was	O
one	O
of	O
the	O
most	O
popular	O
and	O
longest-lived	O
Macintosh	O
models	O
of	O
the	O
20th	O
century	O
.	O
</s>
<s>
For	O
a	O
short	O
time	O
in	O
1989	O
,	O
before	O
the	O
introduction	O
of	O
the	O
40MHz	O
Macintosh	B-Device
IIfx	I-Device
,	O
the	O
IIci	B-Device
was	O
the	O
fastest	O
Mac	O
available	O
.	O
</s>
<s>
The	O
IIci	B-Device
came	O
with	O
either	O
a	O
40	O
-	O
or	O
an	O
80-megabyte	O
hard	O
disk	O
.	O
</s>
<s>
Possible	O
upgrades	O
include	O
the	O
40	O
or	O
50	O
MHz	O
DayStar	O
PowerCache	O
68030	B-Device
,	O
a	O
33	O
or	O
40	O
MHz	O
DayStar	O
Turbo	O
040	O
,	O
and	O
the	O
DayStar	O
Turbo	O
601	O
PowerPC	B-Architecture
Upgrade	O
running	O
at	O
either	O
66	O
MHz	O
or	O
100	O
MHz	O
.	O
</s>
<s>
68030	B-Device
and	O
68040	O
upgrades	O
were	O
also	O
made	O
by	O
Sonnet	O
,	O
Diimo	O
and	O
other	O
companies	O
.	O
</s>
<s>
The	O
MicroMac	O
was	O
a	O
50MHz	O
68030	B-Device
CPU	B-General_Concept
with	O
optional	O
68882	B-General_Concept
FPU	B-General_Concept
,	O
in	O
a	O
form	O
factor	O
which	O
plugged	O
directly	O
into	O
the	O
IIci	B-Device
processor	B-Device
direct	I-Device
slot	I-Device
.	O
</s>
<s>
When	O
the	O
Quadra	B-Device
700	I-Device
was	O
released	O
in	O
1991	O
,	O
a	O
logic	O
board	O
upgrade	O
was	O
made	O
available	O
for	O
the	O
IIci	B-Device
to	O
upgrade	O
it	O
to	O
the	O
performance	O
level	O
of	O
the	O
Quadra	O
.	O
</s>
<s>
An	O
easter	O
egg	O
exists	O
in	O
the	O
IIci	B-Device
ROM	B-Device
.	O
</s>
