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1993-10-23
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ASxxxx Cross Assemblers, Version 1, March 1989
ASxxxx Version 1.1, June 1991
Submitted by Alan R. Baldwin,
Kent State University, Kent, Ohio
Ported to Atari ST by Antonio L. Benci
Monash University, Melbourne, Australia
Operating System: TSX+, RT-11, MS/DOS, TOS
or other supporting K&R C. Compiled with Lattice C 5
to Atari ST platform.
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, 6809, 6811, 8085(8080), and z80(hd64180) micropro-
cessors. Each assembler has a device specific section which
includes: (1) device description, byte order, and file exten-
sion information, (2) a table of assembler general directives,
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) process absolute, relative, concatenated, and
overlay attributes in data and program sections, (4) perform
byte and word program-counter relative (pc or pcr) addressing
calculations, (5) define absolute symbol values at link time,
(6) define absolute area base address values at link time, (7)
produce Intel Hex or Motorola S19 output file, and (8) produce a
map of the linked memory image.
The assemblers and linker have been tested using DECUS C
under TSX+ and RT-11, with TurboC V1.5 under MS/DOS and with
Lattice C 5 under ST TOS. Complete source code and document-
ation for the assemblers and linker is included with the dis-
tribution. 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.