<s>
Called	O
the	O
Z/100	O
family	O
,	O
these	O
were	O
microcomputers	O
running	O
the	O
Intel	B-General_Concept
8080	I-General_Concept
aimed	O
at	O
Fortran	O
IV	O
programmers	O
.	O
</s>
<s>
Their	O
efforts	O
culminated	O
in	O
the	O
REX	O
,	O
a	O
Z80-based	O
microcomputer	O
with	O
24KB	O
of	O
RAM	B-Architecture
(	O
expandable	O
up	O
to	O
64KB	O
)	O
,	O
a	O
built-in	O
keyboard	O
,	O
composite	O
and	O
RF	O
video	O
output	O
(	O
in	O
color	O
or	O
monochrome	O
)	O
,	O
two	O
built-in	O
5.25-inch	O
floppy	O
disk	O
drives	O
,	O
and	O
a	O
15-amp	O
power	O
supply	O
.	O
</s>
<s>
Its	O
motherboard	B-Device
design	O
was	O
based	O
on	O
the	O
S-100	B-Architecture
bus	I-Architecture
and	O
had	O
five	O
free	O
expansion	O
card	O
slots	O
.	O
</s>
<s>
The	O
following	O
year	O
RCC	O
released	O
a	O
single-board	O
computer	O
based	O
on	O
the	O
RCA	B-General_Concept
1802	I-General_Concept
,	O
the	O
MPPS	O
100	O
.	O
</s>
<s>
The	O
company	O
subsequently	O
released	O
another	O
computer	O
based	O
on	O
the	O
Z80	B-General_Concept
,	O
called	O
the	O
Nylac	O
.	O
</s>
<s>
Its	O
motherboard	B-Device
had	O
a	O
Z80	B-General_Concept
processor	O
running	O
at	O
4	O
MHz	O
,	O
an	O
8257/8275	O
memory	O
mapped	O
video	O
controller	O
address	O
at	O
0×F800	O
,	O
and	O
an	O
8251	O
serial	O
controller	O
for	O
input/output	O
.	O
</s>
<s>
There	O
were	O
six	O
S-100	B-Architecture
bus	I-Architecture
interfaces	O
,	O
one	O
of	O
which	O
was	O
occupied	O
with	O
a	O
5.25-inch	O
disc	O
controller	O
card	O
.	O
</s>
<s>
The	O
cabinet	O
was	O
filled	O
with	O
a	O
13-inch	O
CRT	B-Device
display	I-Device
,	O
a	O
linear	O
power	O
supply	O
,	O
two	O
5.25-inch	O
floppy	O
drives	O
(	O
later	O
versions	O
used	O
dual	O
headed	O
drives	O
)	O
.	O
</s>
<s>
The	O
computer	O
ran	O
CP/M	B-Application
.	O
</s>
<s>
It	O
ran	O
a	O
Z80	B-General_Concept
processor	O
and	O
came	O
equipped	O
with	O
64KB	O
of	O
RAM	B-Architecture
stock	O
.	O
</s>
