## ASxxxx Cross Assemblers

####

    ASxxxx Cross Assemblers, Version 3.11, January 2002

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

    Operating System:  MS-DOS, Windows, Linux
    or other supporting K&R C.

    Source Langauge:  C

    Abstract:

       The  ASxxxx  assemblers are a series of microprocessor assem-
    blers written in the C programming  language.   This  collection
    contains cross assemblers for the 6800(6802/6808), 6801(hd6303),
    6804,  6805,  68HC08,  6809,  68HC11,  68HC12,   68HC16,   8051,
    8085(8080),  z80(hd64180),  GameBoy(Z80),  H8/3xx,  DS8xCxxx and
    6500  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
    associated operation codes, (3) machine specific code  for  pro-
    cessing  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,  and
    (6) include-file 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 Intel Hex or Motorola S  record  output  file,
    (9)  produce  a  map of the linked memory image, and (10) update
    the ASxxxx assembler listing files with the absolute linked  ad-
    dresses and data.

       The  assemblers  and  linker  have  been  tested using Linux,
    DJGPP,  Cygwin-1.3.x,  Sun   Solaris   (GCC),   Symantec   C/C++
    V6.1/V7.2,  and VC6 with MS-DOS/Windows 3.x/9x/NT/2000/XP.  Com-
    plete 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, and
    BUFFALO 2.5 for the 6811) are included as  working  examples  of
    use of these assemblers.

####

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