ASxxxx Cross Assemblers

        ASxxxx Cross Assemblers, Version 5.50, September 2023 

        Submitted by Alan R.  Baldwin, 
        Kent State University, Kent, Ohio 

        Operating System:  Linux, Windows, MS-DOS 
        or other supporting ANSI C.  

        Source Language:  C 


           The  ASxxxx  assemblers are a series of microprocessor assem-
        blers written in the C programming  language.   This  collection
        contains   cross   assemblers   for   the  1802,  S2650,  SC/MP,
        4040(4004),  MPS430,   6100,   61860,   6500,   6800(6802/6808),
        6801(6803/HD6303),   6804,   6805,   68HC(S)08,   6809,  68HC11,
        68HC(S)12, 68HC16, 68CF 68K, 740, 78K/0,  78K/0S,  8008,  8008S,
        8048(8041/8022/8021),  8051,  8085(8080),  AT89LP, 8X300(8X305),
        COP4,  COP8,  DS8XCXXX,  AVR,  EZ8,  EZ80,  F2MC8L/FX,  F8/3870,
        GameBoy(Z80),  H8/3xx,  Cypress  PSoC(M8C),  PDP11,  PIC, Rabbit
        2000/3000, RS08, ST6, ST7, ST8, SX, Z8, Z80(HD64180),  and  Z280
        series  microprocessors.   Each  assembler has a device specific
        section which includes:  (1) device description, byte order, and
        file  extension  information,  (2)  a table of assembler general
        directives, special directives, assembler  mnemonics  and  asso-
        ciated operation codes, (3) machine specific code for processing
        the device mnemonics, addressing modes, and special directives. 

           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) alpha-
        betized, formatted symbol table listings, (2) relocatable object
        modules, (3) global symbols for linking object modules, (4) con-
        ditional assembly directives, (5) reusable  local  symbols,  (6)
        include-file  processing,  and  (7)  a  general macro processing

           The  companion program ASLINK is a relocating linker perform-
        ing the following functions:  (1) bind multiple  object  modules
        into  a  single  memory  image,  (2) resolve inter-module symbol
        references,  (3)  resolve  undefined  symbols   from   specified
        librarys of object modules, (4) process absolute, relative, con-
        catenated, and overlay attributes in data and program  sections,
        (5)  perform  byte and word program-counter relative (pc or pcr)
        addressing calculations, (6) define absolute  symbol  values  at
        link  time, (7) define absolute area base address values at link
        time, (8) produce an Intel Hex  record,  Motorola  S  record  or
        Tandy  CoCo  Disk  Basic  output  file, (9) produce a map of the
        linked memory  image,  and  (10)  update  the  ASxxxx  assembler
        listing files with the absolute linked addresses and data.  

           The  assemblers  and  linker have been tested using Linux and
        DJGPP, Cygwin, Symantec C/C++ V7.2, Borland Turbo C++ 3.0,  Open
        Watcom V1.9, VC6, Visual Studio 2005, 2010, 2013, 2015, 2019 and
        2022.  Complete source code and documentation for the assemblers
        and  linker  is  included  with the distribution.  Additionally,
        test code for each assembler and several microprocessor monitors
        (  ASSIST05 for the 6805, MONDEB and ASSIST09 for the 6809, BUF-
        FALO 2.5 for the 6811, and MONDEB for 8051 / AT89LP series ) are
        included as working examples of use of these assemblers.  

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Last Updated: September 2023
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