GAS. Still used for The SCO Group's products, UnixWare and OpenServer. Home site appears inactive. Also offered as part of FreeBSD Ports, in bcc-1995.03.12. Active, supported, but unadvertised. Developed in 1982 at MIT as a cross-assembler, it was picked up by Interactive Systems Corporation in 1983 when they developed PC/IX under IBM contract. The syntax was later used as base for ACK assembler, to be used in MINIX 1.x toolchain. RosAsm project on WebArchive.org. Part of the C++Builder Tool Chain, but not sold as a stand-alone product, or marketed since the CodeGear spin-off; Borland was still selling it until then. Version 5.0, the last, is dated 1996. Turbo Assembler was developed as Turbo Editasm by Uriah Barnett from Speedware Inc (Sacramento, CA) between 1984 and 1987, then later sold to, or marketed by, Borland as their Turbo Assembler. Last stable version 1.3.0 was released in August 2014, and low maintenance since then: https://github.com/yasm/yasm x86-64 assemblers Z80 assemblers Other single target assemblers Other Notes and references External links List of assemblers running on S100 bus hardware, including CP/M hosted assemblers for 8080 and Z80 Assembler Assemblers