Why DEG?

[brouhaha]

(09-26-2024 10:19 AM)toml_12953 Wrote:  If they're supposed to be NOPs, why not just use a register increment or decrement?

What specific instruction(s) are you suggesting for "register increment or decrement"? On most HP RPN calculators, ISG/DSE are the fastest register increment and decrement, and the only ones that don't affect the stack. Having to use a NOP of some sort after, if you don't use the conditional execution of the next line, is a small price to pay.