... The Assembler
... The ASxxxx Assemblers
... Source Program Format
... Symbols and Expressions
... General Assembler Directives
... Invoking ASxxxx
... Errors
... Listing File
... Symbol File
... Object File
... Hint File
... Go to Documentation Index
The ASxxxx assemblers are a series of microprocessor assem-
blers written in the C programming language. Each assembler has
a device specific section which includes:
1. device description, byte order, and file extension in-
formation
2. a table of the assembler general directives, special
device directives, assembler mnemonics and associated
operation codes
3. machine specific code for processing the device mnemon-
ics, addressing modes, and special directives
The device specific information is detailed in the appendices.
The assemblers have a common device independent section which
handles the details of file input/output, symbol table genera-
tion, program/data areas, expression analysis, and assembler
directive processing.
The assemblers provide the following features:
1. Command string control of assembly functions
2. Alphabetized, formatted symbol table listing
3. Relocatable object modules
4. Global symbols for linking object modules
5. Conditional assembly directives
6. Program sectioning directives
ASxxxx assembles one or more source files into a single relo-
catable ascii object file. The output of the ASxxxx assemblers
consists of an ascii relocatable object file(*.rel), an assembly
listing file(*.lst), and a symbol file(*.sym) each controlled by
an assembler option. If both the object and listing files are
specified then a listing to relocated listing hint file (*.hlr)
is created as a helper for the linker to properly create the
relocated listing file.
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Last Updated: September 2023