C51ASM .................................................................................................................... User Guide 3710A–MICRO–10/10 1-2 C51ASM User Guide 3710A–MICRO–10/10 Table of Contents Section 1 Introduction.................................................................................................................1-1 1.1 References......................................................................................................................... 1-1 Section 2 Running the Assembler ..............................................................................................2-1 2.1 Installation.......................................................................................................................... 2-1 2.1.1 Installation under Microsoft Windows .................................................................. 2-1 2.1.2 Installation under Linux........................................................................................ 2-6 2.2 Environment....................................................................................................................... 2-7 2.2.1 Microsoft Windows Environment ......................................................................... 2-7 2.2.2 Linux Environment............................................................................................... 2-7 2.3 Command Line Operation.................................................................................................. 2-8 2.3.1 Output Files ......................................................................................................... 2-9 2.3.2 Command Line Options..................................................................................... 2-10 2.4 Batch File Operation ........................................................................................................ 2-19 2.4.1 Drag–and–Drop ................................................................................................. 2-19 2.4.2 Send To Menu ................................................................................................... 2-19 Section 3 C51ASM Assembly Language ...................................................................................3-1 3.1 Statements......................................................................................................................... 3-1 3.2 Comments.......................................................................................................................... 3-1 3.3 Symbols ............................................................................................................................. 3-2 3.3.1 Labels .................................................................................................................. 3-2 3.3.2 Predefined Symbols............................................................................................. 3-3 3.4 Constants........................................................................................................................... 3-4 3.5 Expressions ....................................................................................................................... 3-6 3.6 Segment Type.................................................................................................................... 3-7 3.7 The 8051 Instruction Set.................................................................................................... 3-9 3.8 Assembler Directives ....................................................................................................... 3-10 3.9 Assembler Controls.......................................................................................................... 3-12 3.10 Conditional Assembly ...................................................................................................... 3-14 Section 4 Macro Processing.......................................................................................................4-1 4.1 Standard Callable Macros.................................................................................................. 4-1 C51ASM User Guide i 3710A–MICROC–10/10 Table of Contents (Continued) 4.1.1 Defining Macros................................................................................................... 4-1 4.1.2 Calling Macros..................................................................................................... 4-2 4.1.3 Macro Parameters ............................................................................................... 4-3 4.1.4 Local Symbols ..................................................................................................... 4-4 4.1.5 Macro Operators.................................................................................................. 4-5 4.1.6 Exiting Macro Expansion ..................................................................................... 4-8 4.2 Repeat Macros................................................................................................................... 4-8 4.3 Nested and Recursive Macro Calls.................................................................................... 4-9 4.4 Nested Macro Definitions................................................................................................. 4-10 Section 5 Assembler Directives..................................................................................................5-1 5.1 DB...................................................................................................................................... 5-3 5.2 DW..................................................................................................................................... 5-3 5.3 DS...................................................................................................................................... 5-4 5.4 DBIT................................................................................................................................... 5-4 5.5 DEFINE.............................................................................................................................. 5-5 5.6 NAME................................................................................................................................. 5-5 5.7 ORG................................................................................................................................... 5-6 5.8 USING................................................................................................................................ 5-6 5.9 END ................................................................................................................................... 5-7 5.10 EQU ................................................................................................................................... 5-7 5.11 CODE................................................................................................................................. 5-8 5.12 DATA ................................................................................................................................. 5-8 5.13 SFR.................................................................................................................................... 5-9 5.14 BIT ..................................................................................................................................... 5-9 5.15 IDATA .............................................................................................................................. 5-10 5.16 EDATA............................................................................................................................. 5-10 5.17 FDATA ............................................................................................................................. 5-11 5.18 XDATA............................................................................................................................. 5-11 5.19 CSEG............................................................................................................................... 5-12 5.20 DSEG............................................................................................................................... 5-12 5.21 ISEG ................................................................................................................................ 5-13 5.22 ESEG............................................................................................................................... 5-13 5.23 FSEG ............................................................................................................................... 5-14 5.24 BSEG............................................................................................................................... 5-15 5.25 XSEG............................................................................................................................... 5-15 5.26 SET.................................................................................................................................. 5-16 5.27 #UNDEF........................................................................................................................... 5-17 5.28 IF...................................................................................................................................... 5-17 5.29 IFN ..................................................................................................................................