Development of the production 68000 version of GEM began in September 1984, when Atari sent a team called "The Monterey Group" to Digital Research to begin work on porting GEM. Originally, the plan was to run GEM on top of CP/M-68K, both ostensibly ported to Motorola 68000 by DRI prior to the ST design being created. In fact, these ports were unusable and would require considerable development. Digital Research also offered GEMDOS (originally written as GEM DOS, it was also called "Project Jason"), a DOS-like operating system aimed to port GEM to different hardware platforms. It was available for 8086 and 68000 processors and had been adapted to the Apple Lisa 2/5 and the Motorola VME/10 development system. Atari decided in January 1985 to give up on the existing CP/M-68K code and instead port DRI GEMDOS to the Atari ST platform, referring to it as TOS.
Development of the production 68000 version of GEM began in September 1984 when Atari sent a team called "The Monterey Group" to Digital Research to begin work on porting GEM Originally the plan was to run GEM on top of CP/M-68K both ostensibly ported to Motorola 68000 by DRI prior to the ST design being created In fact these ports were unusable and would require considerable development Digital Research also offered GEMDOS (originally written as GEM DOS it was also called "Project Jason") a DOS-like operating system aimed to port GEM to different hardware platforms It was available for 8086 and 68000 processors and had been adapted to the Apple Lisa 2/5 and the Motorola VME/10 development system Atari decided in January 1985 to give up on the existing CP/M-68K code and instead port DRI GEMDOS to the Atari ST platform referring to it as TOS