Chapler
6:
Peripheral Devk::es
A
bIt(fO/
bhoIydgff)
is
thesmailesl
unll
of
dolo
meosurement,
In
App~e
computers.
ono
byte
comprises
eight
blIS,
A
bills
oither
on
or
off. 0
10/00.
l
-'
•
A
potter
graph
92
Serial or parallel interface
When you're shopping for printers, you have a choice
between
two
device interfaces:
scr1:JJ
Interface
and
parallel
Interface.
These
terms refer to the way information
is
sent
from the computer to the
printer.
With serial primers, the
computer
sends
information
one
bit
at a time. With parallel primers, the
computer
sends
informa-
tion eight bits at a time Don't let
speed
alone dictate your choice
between a serial
or
a parallel printer. Both modes
of
tI'ansmission
are faster than most printers can print.
.:.
Apple
//e
owners;
Find the printer you want,
and
then
get
the
appropriate interface
card
to
connect
it
to
your
computer.
If
you
get
a serial primer,
get
a serial imerface card.
If
you
get
a
parallel printer,
get
a parallel interface card.
(Don't
assume
that the interface
card
comes with the printer.)
.;. Apple
//c
owners:
The Apple
lie
has a built-in serial port. H you
need
to connect a parallel peripheral device, you muSt also
gCI
a serial-Io-parallel converter device. See your authorized Apple
dealer for details.
Plotters
A
plotter
is
a peripheral device thai uses pens to draw detailed
graphics
on
paper. You can
do
business graphics
on
plotters
or
plOL
engineering and scientific data. Simple ploners have only
one
pen
More complex plotters
can
have as many
as
eight pens. Because
you can change pens, you have a wide variety
of
colors at your
disposal.
To Next Page
Loading...
