[pavon]

Ooh, I'm going to have to download the emulator tonight and try this out. The swiss micro and 47calc sites both say "display with 4 stack levels", but I can't figure out if that is also the size of the logical stack.

The shift key on my HP28C died last year. I never used the advanced features (eg the entire left-hand keypad), but loved its effectively infinite stack, and haven't been able to go back to an HP42, HP35s or the like since.

I'm now using Plus42 on my phone with the big stack option, but would love to have a physical calculator again.

[jasone]

The C47/R47 appears to use the 4-level XYZT stack design by default, but it has an option to use an 8-level stack (XYZTABCD). I really like the unlimited stack option that can be enabled in Free42, but 8 levels might be enough to keep from feeling cramped in practice.

[hamburglar]

“Display with 4 stack levels” would accurately describe the hp 48 series, which had a screen that could show the top 4 things on the stack, but the stack itself had much larger capacity (maybe limited by memory? I can’t remember).