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Int 31H Function 0502H
Free Memory Block
![[0.9]](../0.9.gif)
Frees a memory block that was previously allocated with either the
Allocate Memory Block function (Int 31H Function
0501H) or the Allocate Linear Memory Block function (Int 31H Function 0504H).
Call With
AX = 0502H
SI:DI = memory block handle
Returns
if function successful
Carry flag = clear
if function unsuccessful
Carry flag = set
AX = error code
Notes
- This call will correctly free all of the possible page types that
can occur in a memory block: committed pages, uncommitted pages, and
mapped pages (see Appendix A: Glossary).
- No descriptors are freed by this call. It is the client's
responsibility to free any descriptors that it previously allocated to
map the memory block. Descriptors should be freed before linear
memory blocks.