What is this?

These are the sources used to build orginal ROM versions of TOS 2.06/3.06, the OS used by Atari STE and TT.

The goal of this project was to actually be able to regenerate the original ROM images. The sources are not meant to be a base for serious further development, the Alcyon compiler tools that were originally used are just too outdated and buggy. They could be used to implement smaller patches/fixes.

It is therefor mainly intended to be used as reference.

Directory Structure

bin/tos:
Prebuild binaries of tools used in the build process. These are essentially identical to the ones from the developer kit, with modifications as described in alcyon/README. Sources of almost all of these tools are found in the alcyon directory.

It also contains a few tools that are not part of the developer-kit, but are now used in the build process (sed, rm, mv and bc). Those are taken from GNU packages.
bin/linux:
Same tools as above, but compiled for linux-64bit. The cc68 executable in this directory is just a shell script that recognizes a few of the usual unix cc switches, and translates them to call the various alcyon executables.
bin/win32:
Same tools as above, but compiled for windows-32bit.
include:
Include files for the C compiler. Only a few of them are actually needed for TOS itself, most of them are only needed to build the tools.
lib:
Prebuild libraries and startup files for the C runtime library. None of these is linked into a ROM image, they are only used for the tools.
doc:
Some unsorted documentation.
bios:
Source of the BIOS part of TOS.
vdi:
Source of the VDI part of TOS.
bdos:
Source of the GEMDOS part of TOS.
aes:
Source of the AES part of TOS.
desk:
Source of the desktop application.
common:
Shared include files for the above components.
tools:
Source of some small tools used in the build process, namely the one that glues the builtin resources and newdesk/desktop.inf files together. If you are cross-compiling, these must be compiled by your native host compiler.
system:
Source of some small Atari tools.
listings:
Disassembler listings of various TOS versions that were used while working on some parts of the system.
glue:
The final ROM images will be build here. It also contains link maps for some ROM versions, for reference. The identifiers in those maps are truncated to 8 characters, though (a limitation of the DRI object file format).
alcyon:
Source of the (modified) tools of the Alcyon C compiler & tools, as used to compile TOS.
alcyon/orig:
Source of the tools of the Alcyon C compiler & tools, that compile to binary identical versions of the ones found in the developer kit.

(the contents of the alcyon directory are now available as a separate archive)

Assembler sources

Assembler sources are written in a format that is accepted both by as68 and by the GNU assembler with the --mri option. If you have to use a different assembler, they might need conversion.
All comments in assembly files are in C-style. The makefile preprocesses them before passing them to the assembler. This avoids problems with different types of comment delimiters in different assemblers, and also works around some bugs of the conditional assembly directives of as68. It also allows using the same files defining some key constants to be used for both assembler and C.
Don't put comments after constants that are used in assembler expressions. Since it is a K&R preprocessor, the spaces between the constant and the comment will make it to the source, and the assembler does not like spaces in operands.
Assembling the assembler sources in the bios directory with the original as68 from the developer kit will not work, mostly because it does not support abs.w addressing mode, but also due to numerous bugs. Either use the fixed version from the bin directory or try some other assembler.

Supported versions

BIOS, VDI, GEMDOS, AES, DESKTOP: 2.06, 2.08, 3.06 2.08 is 2.06 modified for ST-Book, it identifies itself as 2.06 though

Supported language versions

us - USA
de - Germany
fr - France
uk - United Kingdom (uses US resources)
es - Spain (no ROM yet found to verify)
it - Italy (no ROM yet found to verify)
se - Sweden
fi - Finland (uses swedish keyboard and resources)
no - Norway (uses swedish keyboard and resources)
sf - Switzerland (French) (uses french keyboard and resources)
sg - Switzerland (German) (uses german keyboard and resources)
pl - Poland (only unofficial version 3.06 found on the net)
cz - Czech (originally was a patched german version)

How to compile

First off to clarify: the goal of this project was to actually be able to regenerate the original ROM images. Most parts of the sources used herein were already available before, but scattered around in several archives, and most of the time incomplete so they could be used for illustratve purposes at best. They are not meant to be a base for serious further development, the Alcyon compiler tools that were originally used are just too outdated and buggy.

Having that said, if you still feeling adventurous and want to try to compile it yourself: