<s>
The	O
IBM	B-Device
1132	I-Device
line	O
printer	O
was	O
the	O
normal	O
printer	O
for	O
the	O
IBM	B-Device
1130	I-Device
computer	O
system	O
.	O
</s>
<s>
The	O
1130	O
had	O
120	O
power	O
transistors	B-Application
,	O
each	O
wired	O
to	O
the	O
print	O
magnet	O
for	O
one	O
printer	O
column	O
.	O
</s>
<s>
As	O
the	O
set	O
of	O
120	O
print	O
wheels	O
spun	O
,	O
the	O
1130	O
received	O
an	O
interrupt	B-Application
as	O
each	O
of	O
the	O
possible	O
48	O
characters	O
was	O
about	O
to	O
move	O
into	O
position	O
.	O
</s>
<s>
The	O
printing	O
driver	B-Application
software	I-Application
had	O
to	O
quickly	O
output	O
a	O
120	O
bit	O
vector	O
designating	O
which	O
transistors	B-Application
were	O
to	O
fire	O
so	O
as	O
to	O
drive	O
the	O
print	O
wheel	O
against	O
the	O
ribbon	O
and	O
paper	O
.	O
</s>
<s>
This	O
put	O
a	O
big	O
performance	O
burden	O
on	O
the	O
CPU	B-Device
,	O
but	O
resulted	O
in	O
an	O
inexpensive	O
(	O
for	O
the	O
time	O
)	O
printer	O
.	O
</s>
<s>
Sometimes	O
a	O
printer	O
output	O
line	O
transistor	B-Application
would	O
fail	O
,	O
resulting	O
in	O
a	O
blank	O
print	O
position	O
.	O
</s>
<s>
Model	O
1	O
prints	O
up	O
to	O
80	O
alphameric	O
or	O
110	O
numeric	O
lines	O
per	O
minute	O
and	O
can	O
be	O
attached	O
to	O
1131	O
CPU	B-Device
Models	O
1	O
,	O
2	O
,	O
3	O
,	O
and	O
5	O
.	O
</s>
<s>
Model	O
2	O
prints	O
up	O
to	O
40	O
alphameric	O
or	O
55	O
numeric	O
lines	O
per	O
minute	O
and	O
may	O
be	O
attached	O
only	O
to	O
the	O
1131	O
CPU	B-Device
Model	O
4	O
.	O
</s>
<s>
Forms	O
skipping	O
under	O
program	O
control	O
through	O
automatic	O
,	O
paper-tape-controlled	B-Device
carriage	I-Device
.	O
</s>
<s>
Printer	O
operation	O
under	O
stored-program	O
control	O
through	O
automatic	O
interrupt	B-Application
system	O
.	O
</s>
