I am referring to this feature: 4.4.4 Architectural features <snip> The NC4016 allows combining nonconflicting sequential operations into the same instruction.

I am referring to this feature: 4.4.4 Architectural features <snip> The NC4016 allows combining nonconflicting sequential operations into the same instruction. For example, a value can be fetched from memory and added to the top stack element using the sequence @ + in a Forth program. These operations can be combined into a single instruction on the NC4016.