In AmigaOS, everything runs in unprivileged mode, except for some specific critical code within exec.library which runs in supervisor mode or interrupt mode.
What's true is that exec.library does offer a call to run code as supervisor[0], and that there's no memory protection.
FWIW I am also linking to AmigaOS 4, MorphOS and AROS...
I wish "Notch" Persson or some other billionaire nerd would just buy the things and declare the whole lot freeware. There surely cannot be much residual value to extract any more.
Not accurate.
In AmigaOS, everything runs in unprivileged mode, except for some specific critical code within exec.library which runs in supervisor mode or interrupt mode.
What's true is that exec.library does offer a call to run code as supervisor[0], and that there's no memory protection.
0. http://amigadev.elowar.com/read/ADCD_2.1/Includes_and_Autodo...