This isn't quite right either. That's not what unreal mode is. Unreal mode has 32-bit data segments limit, not code segment limits. In this case the code segme

This isn't quite right either. That's not what unreal mode is. Unreal mode has 32-bit data segments limit, not code segment limits. In this case the code segment still has a 16 bit limit, it's just that its base address in the descriptor cache is outside the bounds typically associated with real mode.