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Ax51 User's Guide
Ax51 Introduction Assembling Programs Writing Assembly Programs Control Statements 
Macro Processor Standard Macro Processor 
Standard Macro Controls Defining Standard Macros Calling Standard Macros Local Symbols Exiting a Macro Built-in Macros REPT IRP IRPC Standard Macro Operators NUL Operator & Operator < and > Operators % Operator ;; Operator ! Operator MPL Macro Processor MPL Macro Overview MPL Meta Character Defining MPL Macros Calling MPL Macros Local Symbols Expressions Common Functions Bracket Function Comment Function Escape Function METACHAR Function SET Function EVAL Function Comparison Functions Conditional Functions EXIT Function IF Function REPEAT Function WHILE Function Console I/O Functions String Functions LEN Function MATCH Function SUBSTR Function Advanced Literal Delimiters Blank Delimiters Identifier Delimiters Literal and Normal Modes C Preprocessor Exceptions Side-Effects Predefined Macros Examples Error Messages AppendixMPL Macro Overview
Using MPL macros in your assembler programs is relatively easy.
- Use the MPL assembler directive to enable the MPL macro processor. More importantly, make certain MPL macro expansion is not disabled by the NOMACRO directive.
- Define the macros you wish to use. You may create an include file that contains macro definitions you wish to share between source files.
- Call or invoke the defined macro functions in your program source. The macro processor expands macro functions (at macro processing time) which the assembler assembles.
All MPL predefined and user-defined functions must begin with the meta character. By default, the meta character is the percent ('%') character. However, the meta character may be changed by the METACHAR MPL function.
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