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Appendix A
Instructions for Users with
Single Floppy Disk Drive Systems
If
you
have only
one
floppy disk drive,
you
can
still
type
MS-DOS
commands
just
as
if
you
had
two
disk drives
on
your
system_
Just
think
of
your
one-drive system as having
two
drives
(drive
A
and
drive B). But instead
of
A and B representing
two
physical
drives,
they
represent disks.
Just
remember
that
when
you
specify drive
B,
when
the
drive A
disk was
used
last,
MS-DOS
prompts
you
to
insert
the
disk for drive
B.
For example:
A>
copy
command.com
b:
Insert
diskette
for
drive
8:
and
strike
any
key
when
ready
1
File(s)
copied
A>
If
you
specify drive A
when
the
drive B disk was used last,
MS-DOS
asks
you
to
change disks again, this time
prompting
you
to
insert
the
drive A disk.
When
using a batch file
to
execute
commands,
you
follow
the
same procedure.
MS-DOS
waits for you
to
insert
the
appropriate
disk
and
press
any key before it continues.
Important The
letter
displayed in
the
system
prompt
represents
the
default drive
where
MS-DOS
looks
to
find a file
whose
name is
entered
without
a drive name; this
letter
does
not
represent
the
last disk used.
Assume, for example, that A is
the
default drive.
If
the
last com-
mand
performed
was
dir
b:,
MS-DOS
would
act as
if
the
drive 8
. disk is still in
the
drive.
The
system prompt, however, is still
A>,
because
A is still
the
default drive.
If
you
type
the
dir
command,
MS-DOS
prompts
you for
the
drive A disk, because it
is
the
default
drive and you did not specify
another
drive in
the
dir
command.
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