See: Fn 5800H (query allocation strategy)       3.0+

Fn 5801H (set allocation strategy)         3.0+

Fn 5802H (query upper-memory link state)   5.0+

Fn 5803H (set upper-memory link state)     5.0+

Fn 48H (allocate memory)
- -

DOS Fn 58H: Set or Query Memory Allocation Options