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Commodore 1541-II Betriebsanweisung Seite 11

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Seitenansicht 10
WHAT IS A DISKETTE?
CHAYfER2
DISKETIES
Before we actually begin using the drive, let's take a moment to look at the
Test/Demo diskette packed with the disk drive.
Tc;>
do this, grasp it
by
the label, which
should be sticking out
of
the paper jacket. Then pull it out
of
the jacket which keeps
it
free
of
dust and other contaminants. (Save the jacket; the diskette should always be kept in its
jacket except when actually in use in the disk drive.) It
is
often called a floppy diskette,
because it is flexible, even though it is not safe to bend diskettes.
A diskette
is
much like a cassette tape, but in the form
of
a circle and enclosed within
a protective square plastic cover.
As
on a cassette tape, only a small exposed portion
of
the magnetic recording surface
is
sensitive. You may touch the rest
of
the diskette any
time you like, but avoid touching the
few
small portions that are not covered
by
the
protective cover. Also, never
try to remove this cover. Unlike the paper jacket, the plastic
diskette cover
is
intended to remain on permanently.
Next, notice the notch on one side
of
the diskette (it may be covered by a piece
of
tape). This notch is called the write protect notch. When it
is
covered with the opaque tape
packed with blank diskettes, the disk drive cannot change the contents
of
that diskette.
Never remove the tape on the Test/Demo diskette.
The label on the top
of
the diskette says "1541 Test/Demo" on it , and tells you
which diskette you are using. Blank diskettes
come with extra labels in addition to one
applied by the maker
of
the diskette. Use them
to
describe your own diskettes.
• At least two other parts
of
the diskette are worth mentioning: The hub and the access
slot. The hole in the center
is
called the hub. A cone-shaped spindle fills it when the drive
door is closed, and its edges are clamped.
This' keeps them from slipping, when the
diskette spins at
300 RPM in use.
The oval opening in the diskette opposite the label
is
called the access slot. It exposes
just enough
of
the diskette's surface for the read/write head and load pad inside the drive
to touch a one inch long line from the center
to
the edge
of
the diskette' s working surface.
The bottom side
of
that slot
is
where all the information
is
written
as
the diskette spins.
It
is one place your fingers should never touch.
WRITE
PROTECT
NOTCH
ACCESS
SLOT
WHEN
COVERED,
DISKETTE
CONTENTS
CANNOT
BE
ALTERED
LABEL
Fig.4. Position for I>Bkette Insertion
12
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z
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0
0
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SAFETY RULES
FOR
DISKETTE CARE
I.
Keep the disk drive and
its
diskettes away
from
all
moisture, dust, smoke, food , and
magnets (including the electromagnets
in
telephones and TV
's
). Also keep them away
from temperatures either too hot or too cold for you
to
work
in
for extended period
s.
2.
When not
in
the drive, diskettes should
be
stored upright
in
side their paper jackets.
Do
not allow them to become bent or folded . Since the working part
of
the diskette is
on
the bottom, never set
it
down on a table top, or other place where
du
st or moisture
might affect it, and be especially careful
to
keep your fingers away
from
the
opening~
in
the diskette cover.
3.
Although some people sell kits intended
to
" double your
di
skette's capacity"
by
cutting an extra write-protect notch into a
di
skette,
it
is
be
st not
to
use the other s
id
e of
the diskette on the
1541
drive, even
if
your diskette
is
labeled " double-sided
."
Doing
so will cause added wear
to
your diskettes and drive, and
may
cost you
an
important
program some day.
4. When buying diskettes, you may use any good quality
5
1
/•
inch diskette.
5.
Mak'e
sure the diskette center hole is more or less centered
in
its
opening before
inserting the diskette into the drive. Although the hub assembly will correctly center
most any diskette,
it
would be very difficult
to
rescue data from a diskette recorded
with its
hub off-center. One way
to
help center diskettes
is
to
" tickle" the drive door
shut instead
of
slamming it down. By gently closi
ng
it part-way , and then opening a bit
and then closing the rest
of
the way , you give the spindle more chances
to
center the
diskette properly. Another way
to
ease diskette centering
is
to
buy diskettes that come
with reinforced hubs. These hard plastic rings
arouncl the hub opening make the
diskette hub more rigid, and easier
to
center properly. ·
INSERTING A DISKETTE
To insert a diskette in a 1541 (F
ig.
1), first open the drive door
by
rotating the door
lever
counter-clockwise one quarter tum until it stops, with the
lever
level
with the slot
in
the
front
of
the drive.
Grasp the diskette
by
the side opposite the large oval access slot, and hold
it
with the
label up and the write-protect notch
to
the left. Now insert the diskette
by
pushing
it
straight into the slot, the access slot going
in
first and the label last.
Be
sure the diskette
goes in until it stops natµrally, with
no
part showing outside the drive, but you shouldn't
have
to
force or bend it to get
it
there.
With the diskette in position, seat it properly for use
by
twisting the door lever
clockwise one-quarter tum, vertically over the slot until it stops.
If
it
does not move
easily, stop! You may have put the diskette
in
the wrong way, or incompletely.
If
that
happens, reposition the diskette until the door lever closes easily .
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