gcw20877@uxa.cso.uiuc.edu (George Wang) (09/13/90)
I recently found out that some sort of SPICE circuit analysis program exists for the HP28s.. It's a book called Software Power Tools made by Grapevine Publications and can be brought from Educalc or Grapevine direct... My first question is... SPICE for a HP28S with 32K RAM?? Is that possible?? Surely it's not a full version... if not, how much can it actually do?? Does it handle transitors, transient analysis, ac analyis, diodes, etc?? Has anyone used this program and have any comments on it?? Also I heard that it only works for the HP28s unless you're a conversion wizard at the Hp48sx (which I'm sure there are here on the net!! Right Mark? :-) )... Anyways, has anyone been able to port the program over to the 48sx?? Grapevine says that there will be a version/book for the 48sx NEXT YEAR but that's an awfull long time away... If you have ANY info on that SPICE program I'd like to hear from you.. Thanks!! George -- George Wang University of Illinois at Urbana Champaign (217) 332-4019 INTERNET: gcw20877@uxa.cso.uiuc.edu UUCP: gargoyle!igloo!gwang
darrylo@hpnmdla.HP.COM (Darryl Okahata) (09/13/90)
In comp.sys.handhelds, gcw20877@uxa.cso.uiuc.edu (George Wang) writes: > I recently found out that some sort of SPICE circuit analysis > program exists for the HP28s.. It's a book called Software > Power Tools made by Grapevine Publications and can be brought > from Educalc or Grapevine direct... > > My first question is... SPICE for a HP28S with 32K RAM?? > Is that possible?? Surely it's not a full version... if not, > how much can it actually do?? Does it handle transitors, transient > analysis, ac analyis, diodes, etc?? Has anyone used this > program and have any comments on it?? I have not seen such a program, but, if one existed, I'd like to make the following comments. Writing an AC or DC analysis program for *LINEAR* circuit elements (caps, inductors, resistors, etc.) is actually quite trivial. I imagine that most of the work in writing such a program would be in writing a user interface (entering circuits, displaying Bode plots, etc.), as the "simulator" would consist of a simple routine to solve a complex matrix (and we all know how good the 48SX is at solving matrices :-). It would be slow, though. Some people would probably find the speed acceptable, however. Handling nonlinear circuit elements (transistors, diodes, etc.) in an AC or DC analysis *may* be possible, but it's not trivial. It would probably run very, very slow. Handling transient analyses may also be possible (for small circuits only), but you would need *LOTS* of memory (128K? 256K?), and it would probably run slower than frozen molasses in January (unless it was written in assembly language). You would probably be better off watching grass grow. -- Darryl Okahata UUCP: {hplabs!, hpcea!, hpfcla!} hpnmd!darrylo Internet: darrylo%hpnmd@hp-sde.sde.hp.com DISCLAIMER: this message is the author's personal opinion and does not constitute the support, opinion or policy of Hewlett-Packard or of the little green men that have been following him all day.