MagiC

MagiC is a third party and now open-sourced multitasking-capable TOS-compatible operating system for Atari computers, including some newer clone systems manufactured later. There are also variants that run as part of Mac and PC emulation environments, as well as on macOS Intel-Mac computers. Features The kernel of MagiC is largely written in hand-coded assembly language for Motorola 68000, and offers: Extensive Atari TOS compatibility, the developer also created an improved variant (KAOS) Restricted MiNT/MultiTOS compatibility Preemptive multitasking Loadable file systems and long file names Significant performance advantages over both the original TOS and MiNT/MultiTOS platform on the same hardware Disadvantages MagiC was originally a commercial product and not freely available, like MiNT MagiC is not 100% compatible with the original TOS Drivers and file systems from MiNT are not compatible with MagiC Magic-Mac and Magic-PC variants only run under Mac OS and Microsoft Windows respectively, not e.g. Linux distributions Some Atari ST programs assume they alone control the machine, are troublesome when multitasked (mostly graphics glitches) History and variants