Radio Shack TRS-80 Owner's Manual page 152

S-80
MODEL
III
DISK
SYSTEM
B$="VAN"
C$=
"BEETHOVEN"
Then
the
statement
PRINT*1 sUSING"
!
.
!.
% %
"
1A* IB* 5C*
would
write the data in
nickname
form:
L.M.BEET
<
ENTER
>
(In this
case,
we
didn't
want
to
add any
explicit delimiters.)
See
the
print using
description in the
level
ii
basic
Reference
Manual
for a
complete explanation of
the field-specifiers.
Random
Access Statements
FIELD
Organize a
Random
File-Buffer Into Fields
field
nmexp.nmexpl t&var1$\,nmexp2
as var2S.
,
,]
nmsxpl
specifies the length
of
the
first field.
var1$ defines
a
variable
name
for
the
first field.
•i?zyi!?zcz%-ihi--:\?
-;>?£
:-r.::i
c
.?.i-r.":
??•
':
should
Bpai
the record length.
Before FiELDing
a buffer,
you must use an
open
statement
to
assign
that
buffer
to
a particular disk
file
(you must
use
random
access
mode).
Then
use
the
field
statement to
organize
a
random
file
buffer so
that
you can
pass data
from basic
to
disk storage
and vice-versa.
Each
random
file
buffer has
up
to
256
bytes
which
can
store
data
for transfer
from disk storage
to
basic
or
from
basic
to disk.
(When
variable-length
files
are
used,
maximum may
be from
1
to
256.)
However, you need
a
way
to
access
this
134