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

CP/M User's Guide Do You Have The Correct User Number?
4A> User number 4, drive A
A > User number 0, drive A
2B> User number 2, drive B
The user number always precedes the drive identifier. User 0, however, is the default
user number and is not displayed in the prompt.
You can use the built-in command USER to change the current user number.
A >USER 3
3A>
You can change both the user number and the drive by entering the new user
number and drive specifier together at the system prompt:
A >3B
3 B >
Most commands can access only those files that have the current user number. For
example, if the current user number is 7, a DIR command with no options displays
only the files that were created under user number 7. However, if a file resides in
user 0 and is marked with a special file attribute, the file can be accessed from any
user number. (Section 2.7.1 discusses file attributes.)
2.6 Accessing More Than One File
Certain CP/M 3 built-in and transient utilities can select and process several files
when special wildcard characters are included in the filename or filetype. A file specification
containing wildcards is called an ambiguous filespec and can refer to more
than one file because it gives CP/M 3 a pattern to match. CP/M 3 searches the disk
directory and selects any file whose filename or filetype matches the pattern.
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