Restore or drop the i286 protected mode ?

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As Jody suggested I would implement unreal mode for ELKS. It is a simple implementation to access additional memory. However, I would not target the 80286 processor but support 80386 and later processors instead. I do see no advantage in supporting the 80286 processor instead of the 80386 and later processors.

https://en.wikipedia.org/wiki/Unreal_mode

https://wiki.osdev.org/Unreal_Mode

Turning on unreal mode would just have to be implemented when booting. ELKS will still run unchanged then. However, to make use of the additional memory additional changes would be required.

Georg




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