os8088 -- a Mac-style GUI OS for the IBM PC XT
- os8088 1.0 The graphical operating system that could have been for the IBM XT A Macintosh System 1-style desktop for the Intel 8086, written entirely in real-mode assembly and booted from a floppy.
- Overlapping windows, pull-down menus, a serial mouse, loadable programs -- and pre-emptive multitasking, which the real 1984 Macintosh never had.
- pixels640x480 colors16 of RAM256K byte kernel52,718 task slots12 pre-emption18.2Hz os8088 Five programs at once, on a CPU from 1978.
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- os8088 1.0 The graphical operating system that could have been for the IBM XT A Macintosh System 1-style desktop for the Intel 8086, written entirely in real-mode assembly and booted from a floppy.
- Overlapping windows, pull-down menus, a serial mouse, loadable programs -- and pre-emptive multitasking, which the real 1984 Macintosh never had.
- pixels640x480 colors16 of RAM256K byte kernel52,718 task slots12 pre-emption18.2Hz os8088 Five programs at once, on a CPU from 1978.
Sources: Os8088