h6. [[OS SWI Calls]] h6(. » OS_Control h2. OS_Control h5. (SWI &0F) |_<^{width:3em}. Entry | | |<^. R0 |<^. Address of error handler, or 0 to read | |<^. R1 |<^. Pointer to buffer for the error handler, or 0 to read | |<^. R2 |<^. Address of escape state change handler, or 0 to read | |<^. R3 |<^. Address of event handler, or 0 to read | |_<^{width:3em}. Exit | | |<^. R0|<^. Previous error handler address | |<^. R1 |<^. Previous buffer address | |<^. R2 |<^. Previous escape routine address | |<^. R3 |<^. Previous event handler address | h4. Use The purpose of this call is to read or write address handlers. h4. Notes This call is deprecated, and should not be used. [[OS_ChangeEnvironment]] should be used instead. h4. See also * [[OS_ChangeEnvironment]]