<s>
IFSP	B-Architecture
(	O
,	O
)	O
,	O
or	O
radial	O
parallel	B-Device
interface	I-Device
,	O
was	O
a	O
parallel	B-Device
interface	I-Device
similar	O
to	O
the	O
Centronics	B-Device
connector	I-Device
(	O
IEEE	B-Device
1284	I-Device
)	O
but	O
incompatible	O
,	O
as	O
it	O
had	O
different	O
signal	O
polarities	O
and	O
handshake	O
protocol	O
.	O
</s>
<s>
Some	O
devices	O
allowed	O
switching	O
between	O
IFSP	B-Architecture
and	O
Centronics	O
modes	O
,	O
i.e.	O
</s>
<s>
Robotron	O
6319	O
—	O
6329	O
were	O
manufactured	O
with	O
interchangeable	O
interface	B-Application
modules	O
,	O
allowing	O
usage	O
of	O
IFSP	B-Architecture
,	O
IFSS	O
and	O
Centronics	O
.	O
</s>
