[mlaux]

You might already know this but here’s my guess:

OK, so this looks like it’s reading one card’s worth of code from either an actual card or tape. Based on how KNOW is used, the mystery LETTER looks like it’s classifying each word based on what type of token it is… then it goes into an interpreter loop with what’s basically a switch statement on the IDENT of each word (derived from its entry in KNOW). So I think each card could have 14 tokens of up to 6 chars each, some only one character (like a parenthesis) or some an entire literal?

A108 is the per-word outer loop and A105 is the per-char inner loop. A102 and A104 are the labels where the loop indices are updated and it jumps back to the beginning of the loop. As far as I can tell, MADIN and MADOUT are no-ops. I’m not sure what KGETIN is doing.

I believe the 343434343434k is meant to simulate some extra cells with a bunch of right parens so you could just end your program without wasting another card on closing everything?

Edit: I just read page 24 of the linked SLIP manual and what I’m calling tokens they’re calling SLIP cells.