ZiLOG Z80-RIO Operating System User's Manual page 46

Internal commands are indicated by notation just under
the command name in the upper right hand corner of the
page. In this case, the command as given in the
syntax also indicates the extent to which the command
may be abbreviated. Upper case characters are required
while trailing lower case characters are not.
The command may be entered in either abbreviated
or unabbreviated form, in upper or lower case,
e.g., 'DEB' is the same as 'dl.
DESCRIPTION
A general description of command operation and definition
of options.
I/O UNIT UTILIZATION
The logical units that the command uses for a particular
function. I/O error messages generally refer to the unit
on which the error occurred.
EXAMPLES
Illustrative examples of command invocation, where
appropriate.
Note that the length of the parameter string associated
with any single command is intrinsically limited by the
buffer space associated with the command string. This
imposes a 256 character limit on commands entered via the
console input device and a 512 character limit on commands
created by the editor for execution as part of command
files (see section 5.20). Of course, command files created
by copying the console input device directly to a file are
limited only by available memory when executing the command
file.
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