Apple profile - Using the ProFile Device Driver; Duplicating ProFile Diskettes

Using the Device
Driver
A device
driver
is
a machine language
subroutine
that is
used by the
Apple
llls
Sophìsticated Operating
Syslem,
SOS, to communicale with
a
peripheral
device
such as
your
ProFile
drive. The
device driver
program
works
directly wilh
the computer's hardware
and
electronics to
perlorm
the
actual electronic
manìpulation
ol the disk
drive.
To record information
on or retrieve information
from
your
ProFile,
SOS
must communicate
with the ProFile
device
driver. The
device driver will,
in turn, communrcate
directly with
the controller in
lhe ProFile
disk drive.
Each time
your
Apple lll
boots a
disketle
in
its built-in
drive, the
device
drivers are read from
the
diskette and loaded into
memory.
The device
drivers are slored in a
system file called
SOS.DRIVER
in the root
directory of every boot
diskette.
Once
loaded,
the drivers
remain rn
vour
Apple llls memory
untìl
you
turn
off
power
or
reboot
the
system
The SOS.DRIVER file
on a
boot diskelte usuatty
contains
drivers for the
console,
graphics,
audio, the
printer,
and any
other
peripheral
devices
already connected to
your
Apple Ill.
However, it
does nol include
a
driver for ProFile.
Instead,
this driver is included
on the
"ProFile
Driver
and System
Utilities Software"
diskette supplied
in
your
ProFite
accessory
kit,
The name
of the driver
is
.PROFILE.
To use
your
ProFile
disk drive,
you
must first
boot the Apple lll
with a
diskette that contains
the .PROFILE
driver. When
you get
to
Chapter 3,
you
will learn how
to add
the ,PROFILE
driver to boot
diskettes that
do
not
yet
have this
driver
as
part
of their
SOS.DRIVER file.
Duplicating
Your
Diskettes
People often make
duplicate
copies
of
important
documents,
so that if
one copy is accidentally
lost
or destroyed there will
always
be another.
For this
same
reason,
w€
can't stress
enough the importance
of making
copies of
your
boot diskettes. There
are many ways
to
destroy a
diskette: leaving it
out in the
sun or in
a
hot
car trunk,
bending it,
16 ProFile
Owner's lVlanual