<s>
The	O
MC88100	B-General_Concept
is	O
a	O
microprocessor	B-Architecture
developed	O
by	O
Motorola	O
that	O
implemented	O
88000	B-Architecture
RISC	B-Architecture
instruction	I-Architecture
set	I-Architecture
architecture	O
.	O
</s>
<s>
Announced	O
in	O
1988	O
,	O
the	O
MC88100	B-General_Concept
was	O
the	O
first	O
88000	B-Architecture
implementation	O
.	O
</s>
<s>
It	O
was	O
succeeded	O
by	O
the	O
MC88110	B-Device
in	O
the	O
early	O
1990s	O
.	O
</s>
<s>
The	O
microprocessor	B-Architecture
has	O
separate	O
pipelined	O
integer	O
,	O
floating-point	O
add	O
,	O
floating-point	O
multiply	O
,	O
and	O
load/store	O
execution	O
units	O
and	O
dispatches	O
a	O
single	O
instruction	O
(	O
at	O
most	O
)	O
per	O
clock	O
cycle	O
.	O
</s>
<s>
The	O
separate	O
MC88200	B-Architecture
integrated	O
circuit	O
optionally	O
add	O
level	O
1	O
cache	O
and	O
a	O
paged	B-General_Concept
memory	I-General_Concept
management	I-General_Concept
unit	I-General_Concept
.	O
</s>
<s>
An	O
MC88100	B-General_Concept
system	O
typically	O
used	O
two	O
of	O
these	O
devices	O
for	O
instructions	O
and	O
data	O
;	O
additional	O
MC88200s	B-Architecture
could	O
be	O
added	O
to	O
increase	O
the	O
size	O
of	O
the	O
caches	O
.	O
</s>
<s>
In	O
practice	O
,	O
these	O
additional	O
chips	O
required	O
more	O
space	O
on	O
the	O
circuit	O
board	O
and	O
the	O
buses	O
between	O
the	O
MC88200s	B-Architecture
and	O
MC88100	B-General_Concept
added	O
complexity	O
and	O
cost	O
.	O
</s>
<s>
The	O
MC88100	B-General_Concept
contained	O
165,000	O
transistors	O
and	O
the	O
MC88200	B-Architecture
750,000	O
transistors	O
.	O
</s>
<s>
The	O
MC88100	B-General_Concept
was	O
ultimately	O
commercially	O
unsuccessful	O
.	O
</s>
<s>
This	O
was	O
due	O
to	O
a	O
number	O
of	O
reasons	O
,	O
including	O
requirement	O
of	O
MC88200s	B-Architecture
,	O
but	O
was	O
mostly	O
due	O
to	O
Motorola	O
being	O
a	O
vendor	O
of	O
the	O
highly	O
successful	O
68000	B-Device
family	O
.	O
</s>
<s>
As	O
the	O
68000	B-Device
division	O
viewed	O
the	O
88000	B-Architecture
as	O
a	O
competitor	O
,	O
they	O
forced	O
the	O
MC88100	B-General_Concept
to	O
be	O
priced	O
unacceptably	O
high	O
for	O
a	O
volume	O
part	O
.	O
</s>
<s>
The	O
programming	O
model	O
and	O
register	O
set	O
of	O
the	O
MC88100	B-General_Concept
is	O
remarkably	O
similar	O
to	O
DLX	B-Architecture
(	O
and	O
by	O
extension	O
,	O
RISC-V	B-Device
)	O
based	O
CPUs	O
,	O
with	O
32	O
General-purpose	O
registers	O
(	O
31	O
writable	O
)	O
and	O
51	O
instructions	O
capable	O
of	O
accessing	O
any	O
of	O
the	O
32	O
general-purpose	O
registers	O
at	O
any	O
time	O
.	O
</s>
<s>
The	O
MC88100	B-General_Concept
is	O
equipped	O
with	O
a	O
total	O
of	O
64	O
user-accessible	O
registers	O
,	O
32	O
of	O
them	O
being	O
Control	B-Operating_System
registers	I-Operating_System
,	O
and	O
can	O
access	O
up	O
to	O
6	O
registers	O
(	O
4	O
read	O
,	O
2	O
write	O
)	O
simultaneously	O
.	O
</s>
