NSB8 Datasheet, PDF (108/158 Pages) List of Unclassifed Manufacturers – BASIC interpreter for Z80 family

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ITALIAN TECHNOLOGY
FILES
Data is stored on diskette in files. A file is a section of storage space on the diskette which is reserved
for data storage use by giving it a file name and three other attributes: a length (or size), a type, and
an information density. All this file information is stored in a special place on the diskette called the
directory. You can list the name information for each file on diskette by using the CAT command. Each
catalog listing is of the following format:
NAME1
NAME4
:
NAMEn
EXT1
EXT4
:
EXTn
NAME2 EXT2
NAME5 EXT5
:
:
NAME3 EXT3
NAME6 EXT6
:
:
For example, the listing
PROG1 B
DEMOA SOH
denotes the presence of two files named PROG1.B and DEMOA.SOH on the current directory of the
current disk.
FILE NAMES
The name of a file consists of two series of printable characters (the printable characters include the
upper and lower case alphabets, the digits 0 to 9, and some punctuation symbols).The first group is
the real name and it is not more than 6 characters length, while the second group is the file extension,
that is not more than 3 characters length. Generally the file extension give information to the user
about the file contents, in fact the following standard extension are used:
B
-> Tokenized NSB8 source file
SOH
-> Ascii NSB8 source file
DOC
-> Documentation file
TXT
-> Text file
G80
-> GDOS 80 executable file
EXE
-> MS-DOS executable file
etc.
Any characters may be used in any order, with the exception of the space, the comma and the
point. The name of a file must be unique on a diskette that is, two or more files may not share the same
file name on the same diskette. For example, only one file on a diskette may have the name
FILE1. However, it should be noted that the upper and lower case sets of letters are considered to be
separate and distinct with respect to the names of files, so FILE1 and file1 are not the same file name,
and may be used to name different files on the same diskette. A drive number suffix may be added
to the name of a file to indicate that the desired file is located on a diskette in a specific drive, which
resolves any possible confusion between files of the same name on different diskettes. The drive
suffix is formed by following the name of the file with a comma, and then a single digit,
corresponding to the selected drive. If, for example, the file “PROG.B” is on the diskette in drive #2,
the proper way to write its name is “PROG.B,2”. File “POP.B” in drive #3 would be called
“POP.B,3’. If no suffix is given, then the system assumes that the file is on the diskette in drive #1
or current selected drive. The file names “SYNCRO” and “SYNCRO,2” refer to separate files on
different diskettes.
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