h6. [[OS SWI Calls]] h6(. » [[OS_Heap]] h6((. » OS_Heap 4 h2. OS_ Heap 4 h5. (SWI &1D) |_<^{width:4em}. Entry | | |<^. R0 |<^. 4 | |<^. R1 |<^. Pointer to heap| |<^. R2 |<^. Pointer to block| |<^. R3 |<^. Size increase, or –ve for decrease| |_<^{width:4em}. Exit | | |<^. R0 |<^. Preserved | |<^. R1 |<^. Preserved | |<^. R2 |<^. Pointer to new block | |<^. R3 |<^. Preserved | h4. Use The purpose of this call is to change the size of a claimed section of the heap. h4. See also * [[OS_Heap]]