asm6809 is a portable cross assembler targeting the Motorola 6809 and Hitachi 6309.
Features arbitrarily complex expressions (with most C-style operators available), forward references, macro expansion and conditional assembly. Output formats are: Raw binary, DragonDOS binary, CoCo RS-DOS (or "DECB") binary, Motorola SREC, Intel HEX.
Source code version 2.13, released 2023-06-30: asm6809-2.13.tar.gz. Older versions.
Debian snapshot builds are available in the Apt repository.
Ubuntu snapshot builds are available in this PPA on Launchpad.
Windows binaries: 64-bit Windows, 32-bit Windows (cross-built using MinGW)
git clone https://www.6809.org.uk/git/asm6809.git
The manual is available in these formats: PDF, HTML and plain text.
XRoar is a Dragon/Tandy CoCo emulator that can run the output from asm6809.
Notes for version 2.13
- Fix crash when exporting empty symbol table.
- Accept immediate value as argument to stack ops.
For full version information, see the ChangeLog.
License: GNU GPL version 3 or later <http://www.gnu.org/licenses/gpl-3.0.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
The LWTOOLS project includes LWASM. It has support for OS-9 modules and a custom object linking format.
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