Texas Instruments 990 Operation Manual page 248

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The following symbols and conventions are used in defining the syntax of the monitor keyboard
commands:
• Angle brackets
«
»
enclose items supplied by the user.
• Brackets ([ J) enclose optional items.
D.3 TEXT EDITOR COMMANDS
The text editor commands are summarized in table D-2. The syntax of each command and a
paragraph reference to a detailed discussion of the command are shown.
The following symbols and conventions are used in defining the syntax of text editor commands:
• Angle brackets
«
»
enclose items supplied by the user.
• Brackets ([ ]) enclose optional items.
• Braces ({ }) enclose two or more items of which one must be chosen.
• Items in capital letters and punctuation marks must be entered as shown.
The syntax definitions and examples do not show spaces between the characters of the
two-character commands, between the command and operands, or between operands. Spaces may
be entered at these points if desired.
D.4 ASSEMBLER DIRECTIVES
The assembler directives for the Model 990 Assembly Language are listed in table D-3. All
directives may include a comment field following the operand field. Those directives that do not
require an operand field may have a comment field following the operator field. Those directives
that have optional operand fields (RORG and END) may have comment fields only when they
have operand· fields.
The following symbols and conventions are used in defining the syntax of assembler directives:
• Angle brackets
«
»
enclose items supplied by the user.
• Brackets ([ ]) enclose optional items.
• An ellipsis (. .. ) indicates that the preceding item may be repeated.
• Braces C{ }) enclose two or more items of which one must be chosen.
The following words are used in defining the items used in assembler directives:
• symbol - a symbol
• label - a symbol used in the label field
• string - a character string of a length defined for each directive
• expr - an expression
• wd expr - well-defined expression
D-6
Digital Systems Division