Radio Shack TRS-80 Owner's Manual page 66

1
"RS-80
MODEL
111
DISK
SYSTEM
Examples
If
you
are
using
8'/2"-wide forms, you
will
probably want
to
set
width
=
80:
FORMS (WIDTH=80)
If
you
are using 14"-long forms, you
may
want
to set
lines
=
78.
FORMS (LINES=78)
This change
will
allow
the
basic
statement, lprintchr$(12),
to
advance
a
page
by
the correct
number
of
lines.
Notes:
1.
The width you
specify
is
stored
in
ram
location 16427. The
lines you
specify
is
stored
in
ram
location 16424.
2.
The
Printer
must
be ready
when
you
execute
this
command.
FREE
Display
Disk
Allocation
Map
FREE
.rflPRTI
:ti is
the drive specification.
I?
omiiiee.
Bnve
T:
a
«eo
(PRT) teils
trsdos
to
send
the
rsiap to the
Crimps
If
omitted, trsdos sends
the snap
to ihc
Vidso
l^sa'av
ori
This
command
gives
you
a
map
of granule
allocation on
a diskette.
(A
granule,
1280
bytes,
is
the unit
of space
allocation.)
It
also
shows
the location of
the
directory and any flawed
sectors.
When
a diskette has
been used
extensively
(file
updates,
files killed, extended,
etc.),
files
often
become
segmented
(dispersed or fragmented).
This slows
the
access time, since the disk read/write mechanism
must
move
back and
forth
across
the diskette
to
read
and
write
to a
file.
free
helps
you
determine
just
how
segmented your
disk
files are. If
you
decide
you'd
like to
re-organize a
particular
file to
allow
faster access,
you
can
then
copy
it
onto
a relatively
"clean"
diskette.
50