Free42 LSTO REGS

[rprosperi]

Cool idea! This makes it trivial to save the stack state, go do 'whatever' and then restore it.

"LRTN" seems a good name, reinforcing the idea of preserving the local state.

I suppose this could lead to some confusion if the user forgets to LRTN, is adding a new "L" annunciator feasible?

This new capability would be nicely complemented by a pair of commands that get and save the state of all flags (user and system), perhaps GETF and SAVEF; using these in SPUSH and SPOP (also adding available commands to save the registers) would allow them to save the full machine state, from the user's perspective, while running 'whatever'.

It's possible that some system flags could be problematic here, but I imagine you would know about those and they could be 'skipped' if needed.