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12c:impressions [2009/04/28 08:30]
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12c:impressions [2011/10/27 21:23] (current)
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 +====== HP-12c (ARM variant) First Impressions ======
 +
 +(This page taken from Katie Wasserman'​s post on the [[http://​www.hpmuseum.org/​cgi-sys/​cgiwrap/​hpmuseum/​forum.cgi|HP Museum Forums]], by permission)
 +
 +Thanks entirely to Charlie Oxford'​s efforts, I now have a new HP-12C+ to play with.
 +
 +{{:​12c:​p1010368.jpg}}
 +
 +If you like the original 12C you will love this machine. ​ It's
 +functionally identical to the original (we know this because it's
 +emulating the original) but everything runs 60 (sixty) times faster: a
 +long program (my 70 decimal digits of pi) ran in 90 seconds vs 90
 +minutes on the original 12C; a long amortization,​ 1.5 seconds vs 90
 +seconds, 69 factorial gives you an answer almost before you hit the
 +key, it's ludicrously fast!  I hope that this blazing speed does not
 +scar the set-in-their-ways wall street crowd from believing the
 +calculation results.
 +
 +Build quality, key clicks and display readability are excellent. ​ Most
 +importantly,​ no missed keystrokes. ​ The keys themselves use the new,
 +lower density plastic compared to the original, but this is a very
 +minor nit to pick.
 +
 +The only things that are functionally different are the self tests. ​ The manual has not been updated in this section, so it's wrong in most cases:
 +
 +- "​ON"​ + "/"​ runs the sequential key press test but shows 1,2 or 3
 +segments at a time and does not give "error 9" if you press the keys
 +in the wrong order. ​ When the test ends it doesn'​t show the "​12"​ on
 +the display just returns you to the X register.
 +
 +- "​ON"​ + "​x"​ run a self test (I think) for one second and just results
 +to the x register.
 +
 +- [ON] + [-] will clear the calculator and show "Pr Error"​.
 +
 +- [ON] + [+] will run a continues self test (I think) ending when you
 +press and hold any key.
 +
 +Now for the new stuff that I found from playing around:
 +
 +- [ON] + [g] shows the curious display below but I haven'​t found anything
 +that you can do with this yet:
 +
 +{{:​12c:​p1010359.jpg}}
 +
 +- [ON] + [g] + [ENTER} starts a testing menu:
 +
 +{{:​12c:​p1010358.jpg}}
 +
 +1.L - LCD test -- this turns on all the segments. ​ If you then press
 +[Rv] it will turn off half of them, press [Rv] again and you'll toggle
 +the segments on to off and vice versa
 +
 +2.C - Copyright. First you'll see this:
 +
 +{{:​12c:​p1010360.jpg}}
 +
 +the next key press will give you this:
 +
 +{{:​12c:​p1010361.jpg}}
 +
 +then next you'll see this:
 +
 +{{:​12c:​p1010362.jpg}} ​
 +
 +3.H - Extended LCD and key test.  All segments will turn on at first.
 +hit any key and it will turn off 1 to 3 segments that sort of map to
 +the position of the keys -- rows and columns.
 +
 +There are probably other easter eggs in here too, but I have yet to find them.
 +
 +So, how do you find one of these in the store? ​ You can see the bottom
 +edge of the calculator through the packaging, here's what it looks
 +like:
 +
 +{{:​12c:​p1010355.jpg}}
 +
 +Here's a picture of the back, see how big that batter cover is?
 +
 +{{:​12c:​p1010356.jpg}}
 +
 +And here's what it looks like under the door, I need to get one of
 +those special SDK cables from HP so I can start playing around with
 +some alternative firmware.
 +
 +{{:​12c:​p1010357.jpg}}
 +
 +(I'm tempted to pull off the feet and peek at the circuit board, but
 +I'm going to wait for a bit longer.)
 +
 +I think they did a great job on this.  Proven technology and
 +ergonomics updated with modern speed and firmware
 +replacement/​updatability. ​ I can't wait for the modern 15C (and, dare I
 +suggest, 16C).  Way to go HP!  Kudos to Eric, Cyrille, Sam, Gene and whoever else
 +had a hand in this.
 +
 +
  
12c/impressions.txt · Last modified: 2011/10/27 21:23 by admin