[wp34s] The Matrix Reloaded patches

[Paul Dale]

Nice work! Great work in fact. You've figured out a pile of the 34S internal code!


A question, why introduce IINIT and the I regsiter bit operations? Why not use xIN and the local flags (which it allocates)? This also preserves the stack, does the LastX handling for you and handles errors nicely. The downside is the volatile RAM xIN uses but I don't think that's going to be a problem since you don't seem to be using the memory heavy matrix operations from XROM.

Still, an impressive effort.


- Pauli