 Ax51 User's Guide | |
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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 AppendixPredefined Macros
The Ax51 Assembler provides the following predefined constants you may use in preprocessor directives and assembler code to create portable programs.
| Constant | Description |
|---|---|
| __A51__ | Version number of the A51 Assembler (for example, 710 for version 7.10). |
| __AX51__ | Version number of the AX51 Assembler (for example, 212 for version 2.12). |
| __DATE__ | Date when the assembly was started in ANSI format (month dd yyyy). |
| __DATE2__ | Date when the compilation was started in short form (mm/dd/yy). |
| __FILE__ | Name of the file being assembled. |
| __KEIL__ | Set to 1 to indicate the KEIL A51 Assembler. |
| __LINE__ | Current line number in the file being assembled. |
| __MOD_CONT__ | AX51 is generating code in Dallas 24-bit contiguous mode enabled with the MOD_CONT Assembler Directive. |
| __TIME__ | Time when the assembly was started. |
Note
- There are two (2) leading and trailing underscore characters ('_') used for the predefined constants.
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