DIGITAL RESEARCH(r) CP/M Plus TM (CP/M Version 3) Operating ...

2.3 How Are Files Named? CP/M 3 User's Guide
In banked CP/M 3, you can add a password as an optional part of the file specification.
The password can be from one to eight characters. If you include a password,
separate it from the filetype (or filename, if no filetype is included) with a semicolon,
as follows:
CUSTOMER.NAM;ACCOUNT
If a file has been protected with a password, you must ENTER the password as part
of the file specification to access the file. Section 2.7.3 describes passwords in more
detail.
We recommend that you create filenames, filetypes, and passwords from letters
and numbers. You must not use the following characters in filenames, filetypes, or
passwords because they have special meanings for CP/M 3:
< > = , ! I * ? & / $ [ ] ( ) . : ; \ + -
A complete file specification containing all possible elements consists of a drive
specification, a primary filename, a filetype, and a password, all separated by their
appropriate delimiters, as in the following example:
A:DOCUMENT.LAW;SUSAN
2.4 Do You Have the Correct Drive?
When you type a file specification in a command tall without a drive specifier, the
program looks for the file in the drive named by the system prompt, called the
default drive. For example, if you type the command
A>DIR COPYSYS.COM
DIR looks in the directory of the disk in drive A for COPYSYS.COM. If you have
another drive, B for example, you need a way to tell CP/M 3 to access the disk in
drive B instead. For this reason, CP/M 3 lets you precede a filename with a drive
specifier. For example, in response to the command
A>DIR B:MYFILE.LIB
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