h6. [[OS SWI Calls]] h6(. » [[OS_NVMemory]] h6((. » OS_NVMemory 6 h2. OS_NVMemory 6 h5. (SWI &76) |_<^{width:4em}. Entry | | |<^. R0 |<^. 6 | |<^. R1 |<^. NVRAM address | |_<^{width:4em}. Exit | | |<^. R2 |<^. Value | |<^. |<^. All other registers preserved | h4. Use The purpose of this call is query what byte would be written by the OS when it applies its default values, for example when the NVRAM is cleared by the user holding down delete at power on. A return value of -1 means the value is undetermined or not managed by RISC OS. h4. Notes Introduced in RISC OS 5.19. h4. See also * [[OS_NVMemory]]