SEE Function — Display-only logic flow diagram. The SEE function has NO CONTINUATION-MODE; every invocation is a NEW-TRANSACTION. It may serve as the NEW-TRANSACTION-MODE entry point for NXT, DUP, CHG, or DEL functions. Normalize the maintenance key, read the primary record, perform logical join, fill screen fields, send the screen, and return to the caller. Invalid key or record-not-found both route to blank screen before sending. Entry into the SEE Function (SFUNCT = xxxSEE). May have been entered by operator or by a program via FTH-FUNCT command. For exmple, a CHG Function normally issues a FTH-FUNCT to the SEE function to display the updated record. Check function code and perform pre-initialization processing. Earliest developer intercept point — runs for every transaction and every function. Modify function code here if desired. AA100-CHECK-FUNCTION https://www.magec.com/DOC/insert_main.htm#insert001029 MAIN Narrative for function. https://www.magec.com/DOC/genmmp_main.htm#genmmp002009 MAIN Initialize working storage areas. Runs for all maintenance functions. BA100-INIT-STORAGE https://www.magec.com/DOC/insert_main.htm#insert001016 MAIN Mainline logic for all maintenance functions. https://www.magec.com/DOC/genmmp_main.htm#genmmp004057 MAIN Maintenance mainline processing; handles PF/PA key detection (PF7, PF8, PF1, PF2, PF11, PF16, PF17, etc.). https://www.magec.com/DOC/insert_main.htm#insert001028 MAIN AAM200-MAINTENANCE-MAINLINE First 10-bytes of Mask Area give Mask ID, Cursor position, Entry Key detection (ENTER, CLEAR, PF1, PA1, etc.). TWA-MSK-AREA https://www.magec.com/DOC/genmmp_main.htm#genmmp004025 MAIN Initialize screen attributes and table processing. Screen attributes can be overridden by the developer here. https://www.magec.com/DOC/insert_main.htm#insert001017 MAIN BA210-MAINT-SCREEN list of 3270 attributes and their meanings. https://www.magec.com/DOC/magref_main.htm#MAGREF001001 MAIN Normalize the key value entered by the operator in the SKEY field — reformat and validate it. https://www.magec.com/DOC/insert_main.htm#insert001026 MAIN BA400-NORMALIZE-MAINT-KEY Tests whether the key entered by the operator is valid. If invalid, branches right to blank the screen. If valid, continues down to read the record. Read the primary data class record from the file using the normalized key value. AAM410-READ-BY-KEY https://www.magec.com/DOC/insert_main.htm#insert001031 MAIN Tests whether the record was found after the read. If not found, branches right to blank the screen. If found, continues down to the logical join. Perform logical join — secondary files or derived fields are joined to the primary record, building the complete logical record for display. JA100-LOGICAL-JOIN https://www.magec.com/DOC/insert_main.htm#insert001018 MAIN Move all database fields to screen fields for display. Developer can use %COMP for last-minute adjustments to what the operator sees. BB200-FILL-SCREEN https://www.magec.com/DOC/insert_main.htm#insert001005 MAIN Error path routing elbow — connects to blank-screen Blank the screen. Reached when the key is invalid (from %NORMKEY) or the record is not found (from %REDKY). Both error paths converge here before sending the screen. BB100-BLANK-SCREEN https://www.magec.com/DOC/insert_main.htm#insert001003 MAIN Error path routing elbow — connects blank-screen path down to AA800-SEND-SCREEN. Send the resulting screen back to the operator. Last opportunity to make finishing touches before the operator sees it. Runs for both MAINT and BROWSE functions. Test TWA-MSK-ID before referencing non-standard screen fields. AA800-SEND-SCREEN https://www.magec.com/DOC/insert_main.htm#insert001039 MAIN Absolutely the last point in the logical flow. Last opportunity to insert logic before the program issues GOBACK. Can be used to TERMINATE a PCB (e.g. for IMS). If referencing screen data, interrogate which Mask is initialized first. AA900-GOBACK https://www.magec.com/DOC/insert_main.htm#insert001012 MAIN SEE Function processing complete. The SEE function may have served as NEW-TRANSACTION-MODE entry for a subsequent NXT, DUP, CHG, or DEL function. Figure 01 - SEE Function