Radio Shack TRS-80 Model II Reference Manual page 28

General Information
Drive Specification
If you give
TRSDOS
a file command like:
hILL. TEST/1
the System will search for the file
TEST/l,
starting at Drive
°
and going to the
other drives in sequence 1,2,3 until it finds the file.
Anytime
TRSDOS
has to Open a file (e.g., to List it for you) it will follow the drive
lookup sequence 0,
1,2,3.
When
TRSDOS
has to create a new file, it will skip over
any write-protected or full diskettes.
It is possible to tell the System exactly which drive you want to use, by means
of the drive specification. A drive specification consists of a colon: followed
by one of the digits 0,1,2, or 3, corresponding to one of the four drives.
For example:
hIL.L.. TES"['/1:3
tells the System to look for the file
TEST/l
on drive 3 only.
Passwords
You can protect a file from unauthorized access by assigning passwords to the
file. That way, a person cannot access a file simply by referring to the file
name; he must also use the appropriate password for that file.
TRSDOS
allows you to assign two passwords to a file:
• An "Update word", which grants the user total access to the information
(execute, read, write, rename or delete) .
• An "Access word", which grants the user limited access to the information
(see
A TTRIB ).
When you create a file, the Update and Access words are both set equal to the
password you specify. You can change them later with the
PROT
or
ATTRIB
command.
A password consists of a period. followed by 1 to 8 letters or numbers. If you
do not assign a password to a file, the System uses a default password of 8
blanks. In this case the file is said to be unprotected; one can gain total access
simply by referring to the file name.
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