Figure 1 shows the logic for the code in the example program. This flowchart shows an example of how a routine might be written. It uses arbitrary names for things other than the DSECTs. This flowchart also shows how to set up basing for the ISTSREST, ISTSLD, and SRESESS DSECTs. You can use this logic to examine or process the information for each LU-mode contained in the RESTORE control block.