<s>
The	O
DAI	B-Device
personal	I-Device
computer	I-Device
is	O
an	O
early	O
home	O
computer	O
from	O
the	O
Belgian	O
company	O
Data	O
Applications	O
International.The	O
DAI	O
came	O
to	O
market	O
in	O
1980	O
.	O
</s>
<s>
It	O
provided	O
many	O
pioneering	O
features	O
such	O
as	O
high	O
resolution	O
color	O
graphics	O
,	O
a	O
maths	O
co-processor	O
,	O
and	O
a	O
pre-compiling	O
BASIC	O
interpreter	B-Application
.	O
</s>
<s>
The	O
computer	O
was	O
initially	O
designed	O
by	O
DAI	O
for	O
the	O
UK	O
subsidiary	O
of	O
Texas	O
Instruments	O
for	O
use	O
with	O
the	O
PAL	B-Language
televisions	O
used	O
in	O
Britain	O
.	O
</s>
<s>
TI	O
US	O
did	O
not	O
want	O
to	O
build	O
a	O
PAL	B-Language
version	O
of	O
their	O
TI-99/4A	B-Device
home	O
computer	O
,	O
although	O
they	O
subsequently	O
authorized	O
one	O
after	O
they	O
saw	O
the	O
DAI	O
.	O
</s>
<s>
The	O
Dutch	O
educational	O
TV	O
broadcast	O
company	O
Teleac	O
wanted	O
to	O
use	O
the	O
DAI	O
to	O
teach	O
computing	O
,	O
some	O
years	O
before	O
the	O
BBC	O
's	O
similar	O
initiative	O
using	O
the	O
BBC	B-Device
Micro	I-Device
.	O
</s>
<s>
However	O
,	O
they	O
chose	O
the	O
Exidy	B-Architecture
Sorcerer	I-Architecture
instead	O
,	O
because	O
the	O
DAI	O
was	O
not	O
completely	O
ready	O
.	O
</s>
<s>
The	O
DAI	O
was	O
based	O
on	O
a	O
very	O
early	O
8-bit	O
microprocessor	B-Architecture
,	O
the	O
Intel	B-General_Concept
8080	I-General_Concept
A	O
,	O
a	O
CPU	B-General_Concept
that	O
was	O
more	O
advanced	O
than	O
the	O
prior	O
8008	B-General_Concept
.	O
</s>
<s>
It	O
contained	O
on	O
a	O
single	B-Device
printed	I-Device
circuit	I-Device
board	I-Device
all	O
the	O
needed	O
circuitry	O
,	O
some	O
120	O
individual	O
ICs	O
.	O
</s>
<s>
As	O
a	O
computer	B-Device
display	I-Device
,	O
any	O
TV	O
could	O
be	O
used	O
.	O
</s>
<s>
The	O
DAI	O
featured	O
a	O
DAI/Indata	O
DCE	B-Architecture
parallel	I-Architecture
I/O	I-Architecture
bus	I-Architecture
for	O
parallel	O
high	O
speed	O
I/O	O
.	O
</s>
<s>
Graphics	O
capabilities	O
with	O
48k	O
RAM	O
installed	O
allowed	O
up	O
to	O
528	O
x	O
240	O
pixels	B-Algorithm
in	O
4	O
out	O
of	O
16	O
color	O
palette	O
in	O
4	O
successive	O
blobs	O
,	O
leaving	O
16k	O
programming	O
space	O
.	O
</s>
<s>
The	O
repeat	O
count	O
of	O
physical	O
scan	O
lines	O
could	O
be	O
0	O
to	O
15	O
per	O
line	O
(	O
Due	O
to	O
interlacing	O
a	O
physical	O
scan	O
was	O
two	O
pixels	B-Algorithm
high	O
)	O
,	O
</s>
<s>
In	O
4	O
color	O
mode	O
,	O
per	O
logical	O
line	O
one	O
foreground	O
and	O
one	O
background	O
color	O
could	O
be	O
selected	O
,	O
so	O
each	O
line	O
element	O
or	O
logical	O
pixel	B-Algorithm
could	O
be	O
represented	O
by	O
one	O
bit	O
.	O
</s>
<s>
BASIC	O
allowed	O
only	O
the	O
whole	O
screen	O
in	O
one	O
mode	O
,	O
but	O
poking	B-Language
directly	O
in	O
memory	O
allowed	O
mixed	O
resolution	O
lines	O
.	O
</s>
<s>
The	O
whole	O
PGG	O
was	O
implemented	O
with	O
two	O
PROMs	B-General_Concept
and	O
standard	O
TTL	B-General_Concept
logic	I-General_Concept
.	O
</s>
<s>
The	O
scheme	O
predated	O
the	O
Amiga	B-Device
HAM	O
mode	O
by	O
half	O
a	O
decade	O
.	O
</s>
<s>
The	O
BASIC	O
interpreter	B-Application
was	O
remarkably	O
fast	O
for	O
the	O
time	O
because	O
it	O
pre-compiled	O
to	O
an	O
internal	O
byte-code	O
,	O
unlike	O
the	O
Microsoft	O
BASIC	O
interpreter	B-Application
which	O
most	O
other	O
systems	O
of	O
the	O
time	O
used	O
.	O
</s>
<s>
This	O
technique	O
was	O
rare	O
(	O
only	O
other	O
known	O
examples	O
are	O
the	O
ABC	B-Device
80	I-Device
and	O
BK-0010	B-Device
)	O
,	O
and	O
is	O
remarkably	O
similar	O
to	O
that	O
now	O
used	O
for	O
Java	O
.	O
</s>
<s>
To	O
enhance	O
the	O
mathematical	O
abilities	O
of	O
BASIC	O
,	O
(	O
and	O
assembler	O
programs	O
)	O
an	O
AMD	O
AM9511	O
floating	B-General_Concept
point	I-General_Concept
co-processor	I-General_Concept
(	O
compatible	O
with	O
the	O
Intel	O
8231	O
)	O
could	O
be	O
added	O
.	O
</s>
<s>
The	O
original	O
decision	O
to	O
use	O
the	O
8080A	B-General_Concept
1MHz	O
processor	O
(	O
already	O
in	O
use	O
by	O
DAI	O
on	O
other	O
products	O
)	O
was	O
forced	O
by	O
the	O
timescale	O
,	O
which	O
itself	O
was	O
dictated	O
by	O
a	O
desire	O
to	O
show	O
the	O
machine	O
to	O
a	O
TI	O
USA	O
board	O
meeting	O
.	O
</s>
<s>
However	O
,	O
the	O
slow	O
CPU	B-General_Concept
dictated	O
a	O
huge	O
amount	O
of	O
work	O
on	O
the	O
pre-compiling	O
BASIC	O
and	O
the	O
option	O
for	O
hardware-assisted	O
floating	O
point	O
which	O
might	O
not	O
have	O
been	O
required	O
if	O
the	O
newer	O
Z80	O
had	O
been	O
chosen	O
.	O
</s>
<s>
When	O
TI	O
finally	O
did	O
put	O
the	O
99/4	O
onto	O
the	O
European	O
market	O
a	O
few	O
months	O
later	O
,	O
it	O
was	O
initially	O
sold	O
only	O
in	O
a	O
pair	O
with	O
an	O
American	O
NTSC	O
TV	O
because	O
it	O
could	O
not	O
drive	O
European	O
PAL	B-Language
and	O
SECAM	O
sets	O
.	O
</s>
<s>
Sound	O
generation	O
:	O
3	O
frequency	O
generators	O
+	O
1	O
noise	O
generator	O
(	O
General	B-Device
Instrument	I-Device
AY-3-8910	I-Device
?	O
)	O
</s>
<s>
Game	O
controllers	O
:	O
2	O
input	O
interfaces	O
for	O
paddles	B-Device
or	O
joysticks	O
(	O
DIY	O
)	O
.	O
</s>
<s>
Two	O
5.25	O
inch	O
floppy	O
disk	O
drives	O
,	O
2	O
x	O
180K	O
(	O
which	O
enabled	O
the	O
use	O
of	O
CP/M	B-Application
)	O
.	O
</s>
<s>
Compatible	O
with	O
optional	O
card	B-General_Concept
rack	I-General_Concept
,	O
the	O
(	O
"	O
DAI	O
Real	O
World	O
Card	O
System	O
"	O
)	O
,	O
control	O
system	O
.	O
</s>
<s>
2	O
Paddle	B-Device
interfaces	O
,	O
2	O
x	O
6	O
pin	O
DIN	O
female	O
.	O
</s>
<s>
a	O
machine	B-General_Concept
code	I-General_Concept
monitor	I-General_Concept
with	O
the	O
following	O
commands	O
:	O
</s>
<s>
a	O
built	O
in	O
DAI	O
BASIC	O
interpreter	B-Application
.	O
</s>
<s>
the	O
system	O
was	O
also	O
supported	O
with	O
an	O
8080-Assembler	O
.	O
</s>
<s>
Data	O
Applications	O
International	O
(	O
DAI	O
)	O
was	O
a	O
company	O
from	O
the	O
end	O
of	O
the	O
70s	O
to	O
the	O
early	O
80s	O
based	O
at	O
Dreve	O
de	O
Renards	O
6	O
,	O
Brussels	O
that	O
was	O
specialized	O
in	O
creating	O
"	O
Real	O
World	O
Cards	O
"	O
,	O
computer	O
peripheral	O
cards	O
based	O
on	O
their	O
own	O
proprietary	O
DCEbus	B-Architecture
,	O
which	O
in	O
essence	O
consists	O
of	O
three	O
groups	O
of	O
eight	O
I/O	O
lines	O
(	O
coming	O
from	O
an	O
Intel	B-Device
8255	I-Device
)	O
.	O
</s>
<s>
These	O
were	O
Eurocard	O
compatible	O
cards	O
in	O
a	O
19-inch	B-Application
rack	I-Application
.	O
</s>
<s>
Most	O
cards	O
were	O
also	O
based	O
on	O
a	O
single	O
Intel	B-Device
8255	I-Device
chip	O
.	O
</s>
<s>
Around	O
1977	O
they	O
designed	O
the	O
DAI	B-Device
Personal	I-Device
Computer	I-Device
.	O
</s>
