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ASxxxx Cross Assemblers

ASxxxx Cross Assemblers, Version 3.00, May 2000 

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

Operating System:  MS-DOS, Windows 3.x/95/98, 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),  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  direc-
tives,  special  directives,  assembler mnemonics and associated
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 GCC 2.7.2
with LINUX, Symantec C/C++ V6.1/V7.2, DJGPP (GCC 2.8.1) and  VC6
with  MS-DOS/Windows  3.x/95/98.   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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