h6. [[OS SWI Calls]] h6(. » OS_ReadDefaultHandler h2. OS_ReadDefaultHandler h5. (SWI &55) |_<^{width:4em}. Entry | | |<^. R0 |<^. [[System Control Handlers|Handler number]] | |_<^{width:4em}. Exit | | |<^. R0 |<^. Preserved | |<^. R1 |<^. Address of default handler | |<^. R2 |<^. Workspace address | |<^. R3 |<^. Buffer address | h4. Use The purpose of this call is to return the address of the default handler. h4. Notes This enables you to re-install the handler which is set up after a reset or power on. h4. See also * [[System Control Handlers]]