<s>
Shortly	O
afterward	O
the	O
British	O
firm	O
Powertran	O
used	O
this	O
design	O
for	O
their	O
implementation	O
,	O
which	O
they	O
called	O
the	O
PSI	B-Device
Comp	I-Device
80	I-Device
.	O
</s>
<s>
It	O
was	O
sold	O
in	O
the	O
form	O
of	O
a	O
kit	O
of	O
parts	O
for	O
a	O
cased	O
single-board	B-Device
home	O
computer	O
system	O
.	O
</s>
<s>
The	O
system	O
was	O
based	O
on	O
a	O
Z80	B-General_Concept
Microprocessor	I-General_Concept
addressing	O
a	O
mixture	O
of	O
8	O
KB	O
of	O
system	O
RAM	B-Architecture
and	O
EPROM	B-General_Concept
,	O
plus	O
2	O
KB	O
of	O
Video	O
RAM	B-Architecture
.	O
</s>
<s>
It	O
used	O
a	O
National	O
Semiconductor	O
MM57109N	O
as	O
a	O
mathematical	O
co-processor	B-General_Concept
to	O
speed	O
up	O
calculations	O
.	O
</s>
<s>
The	O
monochrome	O
Video	B-General_Concept
Display	I-General_Concept
Controller	I-General_Concept
could	O
simultaneously	O
display	O
combinations	O
of	O
32	O
lines	O
of	O
64	O
characters	O
,	O
and	O
128	O
x	O
64	O
resolution	O
graphics	O
by	O
either	O
displaying	O
a	O
normal	O
character	O
or	O
a	O
"	O
pseudo	O
graphics	O
"	O
character	O
,	O
with	O
pixel	O
blocks	O
in	O
a	O
2x2	O
matrix	O
.	O
</s>
<s>
A	O
technique	O
similar	O
to	O
the	O
one	O
used	O
in	O
the	O
TRS-80	B-Device
-	O
It	O
could	O
later	O
be	O
expanded	O
to	O
a	O
higher	O
resolution	O
,	O
although	O
never	O
to	O
colour	O
.	O
</s>
<s>
Ahead	O
of	O
its	O
time	O
,	O
it	O
incorporated	O
a	O
number	B-General_Concept
crunching	I-General_Concept
coprocessor	I-General_Concept
and	O
a	O
novel	O
language	O
embedded	O
in	O
EPROM	B-General_Concept
called	O
Basic	B-Device
Using	I-Device
Reverse	I-Device
Polish	I-Device
-	O
BURP	O
.	O
</s>
<s>
Add-ons	O
were	O
developed	O
for	O
the	O
system	O
,	O
including	O
memory	O
expansions	O
,	O
floppy	O
and	O
hard	O
disk	O
interfaces	O
,	O
various	O
software	O
packages	O
and	O
a	O
disk	O
operating	O
system	O
,	O
SCIDOS	O
,	O
which	O
was	O
CP/M	B-Application
-compatible	O
but	O
also	O
included	O
features	O
-	O
structured	O
(	O
pathed	O
)	O
disk	O
folders	O
,	O
etc	O
.	O
</s>
<s>
It	O
was	O
based	O
upon	O
a	O
backplane	O
and	O
plug-in	O
cards	O
and	O
modules	O
and	O
featuring	O
a	O
Hitachi	B-General_Concept
HD64180	I-General_Concept
processor	O
,	O
up	O
to	O
512	O
kbytes	O
of	O
RAM	B-Architecture
and	O
a	O
high	O
resolution	O
colour	O
graphics	O
system	O
.	O
</s>
