<s>
TK82C	B-Device
was	O
a	O
Sinclair	O
ZX81	O
clone	O
made	O
by	O
Microdigital	O
Eletrônica	O
Ltda.	O
,	O
a	O
computer	O
company	O
located	O
in	O
Brazil	O
.	O
</s>
<s>
The	O
TK82C	B-Device
had	O
the	O
Zilog	B-General_Concept
Z80A	I-General_Concept
processor	O
running	O
at	O
3.25MHz	O
,	O
2KB	O
SRAM	B-Architecture
and	O
8KB	O
of	O
EPROM	B-General_Concept
with	O
the	O
BASIC	B-Language
interpreter	O
.	O
</s>
<s>
The	O
video	O
output	O
was	O
sent	O
via	O
a	O
RF	O
modulator	O
to	O
a	O
TV	O
set	O
tuned	O
at	O
VHF	B-Algorithm
channel	O
3	O
,	O
and	O
featured	O
black	O
characters	O
on	O
a	O
white	O
background	O
.	O
</s>
<s>
The	O
maximum	O
resolution	O
was	O
64	O
x	O
44	O
pixels	B-Algorithm
,	O
based	O
on	O
semigraphic	B-Data_Structure
characters	O
useful	O
for	O
games	O
and	O
basic	B-Language
images	O
(	O
see	O
ZX81	B-Language
character	I-Language
set	I-Language
)	O
.	O
</s>
<s>
The	O
TK82C	B-Device
included	O
the	O
SLOW	O
function	O
,	O
which	O
permitted	O
the	O
video	O
be	O
shown	O
during	O
the	O
processing	O
(	O
the	O
prior	O
version	O
,	O
TK82	O
,	O
a	O
Sinclair	B-Operating_System
ZX80	I-Operating_System
clone	O
,	O
ran	O
only	O
in	O
fast	O
mode	O
,	O
so	O
the	O
image	O
was	O
not	O
shown	O
during	O
its	O
processing	O
)	O
.	O
</s>
<s>
Although	O
being	O
a	O
ZX81	O
clone	O
,	O
the	O
TK82C	B-Device
did	O
not	O
have	O
the	O
ULA	O
chip	O
from	O
Ferranti	O
,	O
used	O
in	O
the	O
former	O
.	O
</s>
<s>
Instead	O
it	O
was	O
manufactured	O
with	O
a	O
dozen	O
of	O
TTL	B-General_Concept
integrated	O
circuits	O
,	O
which	O
resulted	O
in	O
a	O
somewhat	O
large	O
power	O
consumption	O
.	O
</s>
<s>
Data	O
storage	O
was	O
done	O
in	O
audio	B-Device
cassette	I-Device
tapes	I-Device
at	O
300	O
bits	O
per	O
second	O
,	O
and	O
large	O
programs	O
could	O
take	O
up	O
to	O
6	O
minutes	O
to	O
load	O
.	O
</s>
<s>
The	O
TK82C	B-Device
featured	O
a	O
DIN	B-Application
connector	O
for	O
a	O
joystick	O
(	O
in	O
reality	O
,	O
it	O
was	O
wired	O
to	O
the	O
keyboard	O
matrix	O
)	O
;	O
Microdigital	O
then	O
marketed	O
an	O
Atari	B-General_Concept
2600	I-General_Concept
joystick	O
,	O
accordingly	O
retrofitted	O
to	O
match	O
the	O
DIN	B-Application
connector	O
.	O
</s>
<s>
All	O
software	O
designed	O
to	O
the	O
ZX81	O
could	O
run	O
in	O
the	O
TK82C	B-Device
with	O
no	O
problems	O
,	O
and	O
vice	O
versa	O
.	O
</s>
<s>
The	O
TK82C	B-Device
was	O
replaced	O
by	O
the	O
TK83	O
(	O
it	O
used	O
a	O
ULA	O
similar	O
chip	O
,	O
as	O
the	O
original	O
ZX81	O
)	O
and	O
by	O
the	O
TK85	B-Device
(	O
a	O
16KB	O
RAM	O
version	O
with	O
a	O
case	O
similar	O
to	O
ZX-Spectrum	B-Operating_System
)	O
,	O
more	O
robust	O
and	O
with	O
a	O
better	O
design	O
.	O
</s>
<s>
Microdigital	O
later	O
produced	O
the	O
TK90X	B-Device
and	O
TK95	B-Device
,	O
which	O
were	O
clones	O
of	O
the	O
ZX	B-Operating_System
Spectrum	I-Operating_System
.	O
</s>
<s>
TK82C	B-Device
is	O
also	O
a	O
designation	O
for	O
a	O
copier	O
from	O
Kyocera	O
.	O
</s>
