HP Forum Archive 13

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QPI for the HP-42S Message #1 Posted by Erik Ehrling (Sweden) on 31 Aug 2003, 3:58 p.m. This is just a short note to tell that I have just uploaded the latest version of QPI for the HP-42S at the following URL: http://w1.322.telia.com/~u32220482/qpi42s.html Best regards, Erik Ehrling (Sweden)

Off Topic: Program Listing Font Message #2 Posted by Juergen (CH) on 1 Sept 2003, 3:58 a.m., in response to message #1 by Erik Ehrling (Sweden) Where did you get the font you used for the program listing? Regards, Juergen

Re: Off Topic: Program Listing Font Message #3 Posted by Erik Ehrling (Sweden) on 2 Sept 2003, 1:54 a.m., in response to message #2 by Juergen (CH) Hi Juergen! The listing is just made up of a series of screen-shots from Emu42 (so in a sense the underlying font is the real HP-42S font, although it is not made using a font per se), however if anyone could recommend a good program to construct a font from bitmaps it would not be much work to convert it into a real font. Best regards! /Erik

Re: Off Topic: Program Listing Font Message #4 Posted by Gordon Dyer on 2 Sept 2003, 4:48 p.m., in response to message #2 by Juergen (CH) Look in here for some nice fonts produced by Luiz: http://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/articles.cgi?read=286

Re: QPI for the HP-42S Message #5 Posted by Werner Huysegoms on 2 Sept 2003, 2:56 a.m., in response to message #1 by Erik Ehrling (Sweden) Lines 381 and 383 should not be there; they cannot be correct. RCL "T_QPI" RCL "Z_QPI" RCL "Y_QPI" RCL "X_QPI" fills the stack Cheers, Werner

Program Encapsulation on a HP-42S (Was: Re: QPI for the HP-42S) Message #6 Posted by Erik Ehrling (Sweden) on 2 Sept 2003, 1:37 p.m., in response to message #5 by Werner Huysegoms Hi Werner! Certainly the lines should be there! The lines 2-12 at the start of the program stores the contents of the stack (and all registers). The corresponding lines 376-391 at the end of the program restores the stack (and all registers). This way program encapsulation is achieved on the HP-42S! Further, this allows you to run QPI in the middle of a calculation and then continue the calculation after QPI has run! Best regards, Erik Ehrling (Sweden)

Re: Program Encapsulation on a HP-42S (Was: Re: QPI for the HP-42S) Message #7 Posted by Victor Koechli on 2 Sept 2003, 8:04 p.m., in response to message #6 by Erik Ehrling (Sweden) No, Werner is right, I've noticed this too. The lines 381 and 383 are too much. Consider: If you do RCL "T_QPI" STO ST_T you will restore the saved T register contents directly to T. But if you now execute RCL "Z_QPI" the stack is lifted and the contents of T are lost. Instead you should just do RCL "T_QPI" RCL "Z_QPI" RCL "Y_QPI" RCL "X_QPI" as Werner suggests, and the entire stack will be restored. Cheers, Victor

Oh yes, they are redundant! (Was: Program Encapsulation on a HP-42S (Was: Re: QPI for the HP-42S)) Message #8 Posted by Erik Ehrling (Sweden) on 3 Sept 2003, 2:10 p.m., in response to message #7 by Victor Koechli Oh yes! The lines are redundant (even though the program works perfectly with the lines in place as well...). Thanks! Regards, Erik

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