DB48X: HP48-like RPL implementation for DM42

[n1msr]

Christophe (and anyone who is using DB48X/50X),

Thanks again for release 0.8.7. I was using the CATALOG to look for Attach and Detach added in the release and it led to this question on the behaviour of CATALOG. I understand that CATALOG is context sensitive, which makes sense if it bring functions that are likley to be of immediate use to objects on the stack, say. That's great :-)

This post refers to DB50X v0.8.7 on my DM32.

What I am unsure about is the cyclic nature of CATALOG. I have assumed that if I cycle through the CATALOG menus using the forward and back soft keys (F6 and SHIFT F6) I will be able to get to all functions or menus eventually and that it is a big loop. Is that right?

If I have nothing on the stack, I press f CAT (f = one press of blue function key on DM32) I get a set of 15 functions (F5 = %T) and the arrow keys of F6 and f F6. I can hit the F6 key (forward arrow) 42 times and am back at the first CATALOG menu (the one including %T on F5).

If I have a number on the stack (the number 3 in 'D' mode) and press forward ~44 times, I finish on a menu very similar to the first menu (with %T) but the F6 key has %Total, = and acosh. But there are no forward or back arrows on any of the soft menu keys. Is this intended?

In my several attempts to reproduce this "dead end" or "cul-de-sac" menu, the number of times I press forward arrow (F6) seems to vary. In another test it took 98 presses of the F6 key. Perhaps I have misundertood something? Has anyone else seen this or maybe can explain?

So far, this behaviour has not occurred on the DB48X simulator v0.8.7 on Fedora (WSL). It has reliably cycled all the way through to the first CAT menu and starts again.

Thank you again for the DB (Dave and Bill) project!

Mark.