SR-52 keycode mnemonics?

[John Garza (3665)]

I thought only the TI-58/59 could print mnemonics for keycodes on the PC-100A printer when listing a program.

I have an SR-52 Aviation library manual (1976) that is in a larger format and three hole punched (as opposed to the earlier smaller spiral bound ones) that has program listings that are copies of printer output (dot matrix as opposed to typeset) that show mnemonics.

Was this a later feature of the SR-52/PC-100A? Or maybe some in-house hardware that TI used to make the listings? Perhaps something they developed when working on the upcoming TI-58/59 printer mnemonics?

-J