bass is a table-driven, patching cross assembler.
Unlike a traditional assembler, there is no linker stage: assembly code is patched directly onto existing images. It is primarily intended for modifying existing binaries; although it is fast enough to build complete programs from scratch as well.
Currently, it supports the WDC 65816 and Sony SPC700 CPUs.
Latest Version: v15
bass is licensed under the GNU GPLv3 license.