<s>
The	O
TEC-1	B-Device
is	O
a	O
single-board	O
kit	O
computer	O
first	O
produced	O
by	O
the	O
Australian	O
hobbyist	O
electronics	O
magazine	O
Talking	O
Electronics	O
in	O
the	O
early	O
1980s	O
.	O
</s>
<s>
The	O
design	O
by	O
John	O
Hardy	O
and	O
Ken	O
Stone	O
was	O
based	O
on	O
the	O
Zilog	B-General_Concept
Z80	I-General_Concept
CPU	O
,	O
had	O
2K	O
of	O
RAM	O
and	O
2K	O
of	O
ROM	O
in	O
a	O
default	O
configuration	O
.	O
</s>
<s>
This	O
allowed	O
the	O
early	O
software	O
presented	O
in	O
the	O
magazine	O
to	O
be	O
used	O
with	O
the	O
later	O
version	O
of	O
the	O
TEC-1	B-Device
.	O
</s>
<s>
Included	O
in	O
this	O
page	O
count	O
were	O
two	O
peripherals	O
designed	O
by	O
Ken	O
Stone	O
for	O
the	O
TEC-1	B-Device
-an	O
8x8	O
matrix	O
display	O
,	O
and	O
a	O
relay	O
driver	O
board	O
,	O
allowing	O
the	O
TEC-1	B-Device
to	O
be	O
interfaced	O
to	O
other	O
equipment	O
.	O
</s>
<s>
Issue	O
13	O
,	O
pages	O
9	O
to	O
26	O
,	O
had	O
the	O
fourth	O
instalment	O
,	O
including	O
a	O
power	O
supply	O
designed	O
specifically	O
for	O
it	O
,	O
and	O
a	O
non-volatile	O
RAM	O
module	O
to	O
allow	O
data	O
to	O
be	O
retained	O
,	O
even	O
after	O
the	O
TEC-1	B-Device
was	O
powered	O
off	O
.	O
</s>
<s>
This	O
was	O
crucial	O
,	O
as	O
,	O
up	O
to	O
this	O
point	O
,	O
there	O
had	O
been	O
no	O
way	O
to	O
save	O
anything	O
programmed	O
into	O
the	O
TEC-1	B-Device
,	O
short	O
of	O
leaving	O
it	O
connected	O
to	O
power	O
indefinitely	O
.	O
</s>
<s>
The	O
later	O
monitor	O
software	O
(	O
MON	O
2	O
)	O
was	O
introduced	O
,	O
as	O
were	O
a	O
crystal	O
oscillator/clock	O
and	O
an	O
interface	O
board	O
to	O
allow	O
the	O
TEC-1	B-Device
to	O
be	O
connected	O
to	O
external	O
devices	O
.	O
</s>
<s>
This	O
was	O
not	O
actually	O
called	O
a	O
TEC-1	B-Device
,	O
and	O
was	O
unlike	O
any	O
that	O
are	O
shown	O
in	O
the	O
photos	O
.	O
</s>
<s>
The	O
first	O
TEC-1	B-Device
prototype	O
.	O
</s>
<s>
The	O
first	O
TEC-1	B-Device
prototype	O
to	O
work	O
without	O
corrections	O
to	O
the	O
PCB	O
track	O
work	O
.	O
</s>
<s>
TEC-1	B-Device
.	O
</s>
