h6. [[OS SWI Calls]] h6(. » OS_ServiceCall h2. OS_ServiceCall h5. (SWI &30) |_<^{width:4em}. Entry | | |<^. R1 |<^. [[Service Calls|Service number]] | |\2<^. All other registers dependent on reason code| |_<^{width:4em}. Exit | | |<^. R1 |<^. 0 if service call was claimed| |\2<^. Other registers may be altered if the service was claimed| h4. Use The purpose of this call is to issue a service call to a module. h4. Notes This call should be used in instead of [[OS_Byte 143]], as it is now deprecated. h4. See also * [[OS_Byte 143]] * [[Service Calls]]