but... Why?

nastables

Hi I recently had a problem with a sony deck solved (with the help of a few freinds) by making a sys call and after various cable suggestions (one of which worked)
Now I am very happy it works but it leave me with the question .. why? looking at the lib file I cant see any hex command that correlates with the command structure(I tried a few and they dont work) I can see within the LIB file callouts to feedback libs but not to any that show the hex for the protocol.. can anyone explain to me..

Yours trying desparatly to understand the magic...
Nigel