HP-35s in Hex mode « Next Oldest | Next Newest »

 ▼ Joel Setton (France) Member Posts: 86 Threads: 8 Joined: Apr 2008 01-20-2010, 04:55 PM Folks, I guess I'm not the first person trying to use the 35s to do hexadecimal arithmetic... But the thing is next to useless! Looking at the example of a simple addition (page 11-5 in the user's guide), why does the 35s require a hex terminator, i.e. three additional keystrokes after every number? Once HEX mode is selected, couldn't they make it work this way: 1 2 F [enter] E 9 A + This is just plain-vanilla RPN... In decimal mode, arithmetic operators (such as + - * /) terminate the number being entered before performing the operation. Why not in hex mode? Didn't anyone at HP test this before releasing the code to production? Beats me. Joel Setton. ▼ Don Shepherd Posting Freak Posts: 1,392 Threads: 142 Joined: Jun 2007 01-20-2010, 05:44 PM Joel, it is well known that number bases were not implemented well on the 35s. It is what it is and will not likely change. Martin Pinckney Posting Freak Posts: 1,248 Threads: 33 Joined: Aug 2007 01-20-2010, 09:20 PM Try the 27s. In Hex mode, it provides soft keys for A-F. Effortless. ▼ Joel Setton (France) Member Posts: 86 Threads: 8 Joined: Apr 2008 01-21-2010, 06:47 AM Right. I also have an HP-20S which is close to the 27s in this respect, but they are both (ewww...) algebraic. Ah, well. Joel Setton ▼ Dave Britten Member Posts: 247 Threads: 26 Joined: Oct 2007 01-21-2010, 07:22 AM Get a 32sii (or 32s). The number base handling is nearly identical to the 20s, the only difference being you have to switch bases using a menu, which amounts to one extra keystroke. That said, the 20s is a surprisingly capable machine, and you can do some rather interesting tricks with INPUT, SWAP, and LAST. For example, here's a MOD program that uses no storage registers: ```LBL F = ( SWAP INPUT = / LAST ) IP * LAST = ( SWAP - LAST = RTN ``` Martin Pinckney Posting Freak Posts: 1,248 Threads: 33 Joined: Aug 2007 01-21-2010, 03:03 PM Well, I forgot to mention the 42s also has an excellent implementation, with soft keys for A-F. But as Dave pointed out, the 32sii method is pretty slick, too. Ken Shaw Member Posts: 149 Threads: 7 Joined: Dec 2006 01-21-2010, 12:37 PM Lack of RPN on the 27S is it's big drawback. That aside, the ease-of-use is amazing. R-P conversions, base conversions, etc., are all very intuitive. I think it's very under-appreciated. ▼ Martin Pinckney Posting Freak Posts: 1,248 Threads: 33 Joined: Aug 2007 01-21-2010, 02:40 PM Quote: Lack of RPN on the 27S is it's big drawback. *IF* you are an RPN fanatic. Which I am not. Dave Britten Member Posts: 247 Threads: 26 Joined: Oct 2007 01-21-2010, 04:42 PM Quote: I think it's very under-appreciated. Based on the prices that model usually commands, I'm going to have to disagree with you. :)

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