I am reading over the history of the Nova, which claims that a key moment in its creation was a 4-bit ALU which was shown to them by their Fairchild sales rep. I assume this refers to the 9340? But other sources claim the Nova used the 74181, which was from TI.
I believe this bit of confusion is due to the 9340 being a licensed 74181? I see mentions of the 9341 being "the equivalent" to the 74181, but I'm not sure if the last digit being 0 or 1 is meaningful.
But now I see notes that the early Novas did not use ALUs at all, but were based on simpler adders and such, like the 7483. It was only the SuperNova that used more complex designs, apparently the Signetics 8260. However, spec sheets suggest the 8260 is a 74181, so I am again confused.
Does anyone have a better source on all of this with more detail?