<s>
The	O
Netronics	B-Device
ELF	I-Device
II	I-Device
was	O
an	O
early	O
microcomputer	O
trainer	O
kit	O
featuring	O
the	O
RCA	B-General_Concept
1802	I-General_Concept
microprocessor	O
,	O
256	O
bytes	O
of	O
RAM	B-Architecture
,	O
DMA-based	O
bitmap	O
graphics	O
,	O
hexadecimal	O
keypad	O
,	O
two	O
digit	O
hexadecimal	O
LED	O
display	O
,	O
a	O
single	O
"	O
Q	O
"	O
LED	O
,	O
and	O
5	O
expansion	O
slots	O
.	O
</s>
<s>
Unlike	O
similar	O
"	O
bare	O
circuit	O
card	O
"	O
trainer/experimenter	O
computers	O
of	O
the	O
day	O
,	O
the	O
ELF	B-Device
II	I-Device
could	O
be	O
easily	O
expanded	O
thanks	O
to	O
its	O
built-in	O
bus	O
.	O
</s>
<s>
The	O
"	O
Full	O
BASIC	O
"	O
ROM	B-Device
card	O
provided	O
an	O
RPN	O
calculator	O
chip	O
as	O
a	O
simple	O
and	O
low-cost	O
math	B-General_Concept
coprocessor	I-General_Concept
.	O
</s>
<s>
As	O
a	O
result	O
,	O
floating	B-Algorithm
point	I-Algorithm
operations	O
were	O
an	O
order	O
of	O
magnitude	O
faster	O
than	O
what	O
was	O
possible	O
in	O
software	O
.	O
</s>
<s>
Either	O
configuration	O
could	O
be	O
interfaced	O
to	O
the	O
ELF	B-Device
II	I-Device
through	O
the	O
Giant	O
Board	O
.	O
</s>
<s>
The	O
terminal	O
kits	O
were	O
also	O
marketed	O
independently	O
of	O
the	O
ELF	B-Device
II	I-Device
.	O
</s>
<s>
The	O
ELF	O
part	O
of	O
the	O
name	O
came	O
from	O
an	O
earlier	O
machine	O
called	O
the	O
"	O
COSMAC	B-Device
ELF	I-Device
"	O
,	O
published	O
as	O
a	O
construction	O
project	O
in	O
Popular	O
Electronics	O
magazine	O
.	O
</s>
<s>
Improvements	O
on	O
its	O
predecessor	O
included	O
an	O
etched	O
PCB	B-Protocol
,	O
a	O
hexadecimal	O
keypad	O
instead	O
of	O
toggle	O
switches	O
for	O
program	O
entry	O
,	O
the	O
RCA	O
CDP1861	O
Pixie-graphics	O
chip	O
,	O
and	O
the	O
5	O
slot	O
86-line	O
bus	O
for	O
expansion	O
cards	O
.	O
</s>
