Just recently I got a question about the use of the z/VSE LOAD macro below and above the (16 MB) line.
The LOAD macro was enhanced with z/VSE 4.3 to allow execution in 31 bit addressing mode. It loads the specified phase into storage, if this phase is not in the SVA (shared virtual storage). The enhancement is transparent to existing programs.
Before I describe what changed, I will summarize addressing and residency modes.
A program (phase) can have one of the following addressing modes:
24-bit addressing mode (a... [More]