John Dravnieks kindly suggested adding ASI and AGSI to VisibleZ. David Staudacher suggested using LARL to load a base register in a few VisibleZ programs. Thanks to both of you for the great suggestions. You can watch ASI in action with LARL in the following video (and in the last table on the IBM Mainframe Assembler tab). The video illustrates adding a binary immediate constant to a binary fullword without using a register. AGSI, a sister instruction, works in a similar fashion on doubleword and can be viewed here and on the IBM Mainframe Assembler tab. I haven’t released the latest VisibleZ code which contains these instructions. I’m working on that.