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ASxxxx Cross Assemblers


ASxxxx Cross Assemblers, Version 4.00, November 2003 

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

Operating System:  MS-DOS, Windows, Linux 
or other supporting ANSII 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 AVR, PIC, Rabbit 2000/3000,
DS8xCxxx,   z80(hd64180),    GameBoy(Z80),    MPS430,    H8/3xx,
6800(6802/6808), 6801(hd6303), 6804, 6805, 68HC08, 6809, 68HC11,
68HC12, 68HC16, 8051, 8085(8080), 6500,  1802,  740,  and  61860
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,  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,  Symantec  C/C++   V6.1/V7.2,   and   VC6   with
MS-DOS/Windows  3.x/9x/NT/2000/XP.  Complete source code and do-
cumentation 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 in-
cluded as working examples of use of these assemblers.
  

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