Purpose: Set channel LA, FA, SA
Call address: $FFBA (hex) 65466 (decimal)
Registers: .A = LA (logical #) .X = FA (device #) .Y = SA (secondary adr) Memory: system map Flags: none Calls: noneResults:
Registers: none Memory: LA, FA, SA updated Flags: none
Description: SETLFS sets the logical file number (LA, $B8), device number (FA, $BA) and secondary address (SA, $B9) for the higher-level Kernal I/O routines. The LA must be unique among OPENed files and is used to identify specific files for I/O operations. The device number rangs is 0 to 31 and is used to target I/O. The SA is a command to be sent to the indicated device, usually to place it in a particular mode. If the SA is not needed, the .Y register should pass $FF. SETLFS is often used along with SETNAM and SETBNK calls prior to OPENs. See the Kernal OPEN, LOAD and SAVE calls for examples.