Some assorted HP67/97 questions

[Dieter]

I am currently translating an HP41 a program for the 67/97. All I got is a simulator that seems to have several bugs, so I would like to ask users of "the real thing" a few questions. ;-)

1. Display formatting: when the display underflows in FIX mode, does it switch to SCI 9 or does it keep the number of digits set by DSP? In other words: if FIX DSP 2 is set, will 1/300 be displayed as 3,33 -03 or 3,333333333 -03?
2. When the program reaches a RTN statement and there is no pending subroutine call, does the program stop at the current line number so that R/S would continue there (like e.g. the 41) or does it return to step 000 (like e.g. the 34C)?
3. On the 34C and 41 I always tried to avoid the slow y^x function, e.g. by calculating cubes via [ENTER] [x²] [x]. I assume this is also a good idea for the 67/97. But what about x⁸ ? Is [x²] [x²] [x²] still faster than [8] [y^x]? I suppose it is, but maybe someone can check this. I also remember a table with timings of several functions in some HP-related magazine, but I cannot seem to find it. #-)
4. Can someome recommend a good 67/97 emulator for Windows that runs the original microcode? Nonpareil sounds perfect but it seems to be unavailable.
   

Thank you very much for your help.

Dieter