TOPS-20 PASCAL Language Manual - Bitsavers

USING PASCAL ON TOPS-20
8.2 FILE SPECIFICATIONS AND DEFAULTS
A file specification indicates the input file to be processed or the
output file to be produced. File specifications have the following
form:
device:filename.fiJetype.gen
The punctuation
required syntax
specification.
marks
that
(colons,
separate
angle brackets, and periods) are
the various compone~ts of the file
device
directory
identifies the device or file structure on which the file is
stored or is to be written.
filename
identifies the name of the directory under which
catalogued, on the device specified. You can
directory name with angle brackets, as shown above.
the file
delimit
is
the
identifies the file by its name.
to 39 alphanumeric characters.
characters.
The source file name can be up
REL file names can be up to six
filetype
gen
describes the kind of data in the file. The source file type can
be up to 39 alphanumeric characters. REL ffle types can be up to
three characters.
specifies the generation of the TOPS-20 file desired.
Generations are identified by a decimal number, which is
incremented by 1 each time a new generation of a file is created.
A period is used to separate file type and generation.
You need not explicitly state all elements of a
each time you compile, load, or execute a program.
is required, as long as you use the default file
summarizes the default values.
file specification
Only the file name
type. Table 8-1
8-2