MAC/65

MAC/65
Original author(s)Steven D. Lawrow
Developer(s)Optimized Systems Software
Initial release1982; 42 years ago (1982)
Final release
4.20 / 1994; 30 years ago (1994)
PlatformAtari 8-bit
Size16 KB
TypeAssembler
LicenseProprietary software

MAC/65 is a 6502 assembler written by Stephen D. Lawrow for Atari 8-bit computers. MAC/65 was first released on disk by Optimized Systems Software in 1982, with the program requiring 16 KB RAM. A bank switched "SuperCartridge" from OSS followed in January 1984 for US$99,[1] occupying only 8 KB.

MAC/65 is structured similarly to the Atari Assembler Editor cartridge, combining a line editor, assembler, and debugger into a single package. Its reputation was based on being much faster than either the Assembler Editor or the standalone Atari Macro Assembler. Brian Moriarty of Infocom wrote, "No assembler [at the time] on the C64 even comes CLOSE to MAC/65. Take it from someone who looked for one."[2] It was used to write numerous commercial games and applications, and the majority of assembly language listings in ANALOG Computing were written with MAC/65.

According to Lawrow, MAC/65 was used to compile not only itself, but BASIC XL and BASIC XE.

  1. ^ "OSS Newsletter". archive.org. January 1984.
  2. ^ Cite error: The named reference infocom was invoked but never defined (see the help page).