(11C) Indirect Line Number Branches

[grsbanks]

I think you're over-complicating things. There is no "should I branch upwards or downwards?" There is simply "I need to find LBL 1, wherever it is, and jump there."

Whether you do effectively jump upwards or downwards is purely dependent on the position of the label relative to your current position, but you only have to start asking questions about how the calculator actually finds the label if it occurs more than once in the same program.