|HP codename, series||"1.5", Voyager|
|Type, Precision, Input Mode||Scientific, 10 BCD digits, exponent ±99, Reverse Polish Notation|
|Programmable||Maximum 448 steps, program editing, numeric and symbolic labels, flags, ISG & DSE, subroutines, indirect GTO/GSB|
|Performance Index||Original HP-15C: 2.7
2012's new "Limited Edition": 195
AmeloConsulting HP-15C V3.2.2 on iPhone4: 485
|Memory||67 registers, each can store a number or 7 bytes.
Variable assignment to programs or registers. Registers are also needed for the complex stack, the solver and numerical integration. Permanent memory.
|Limited Edition CPU||The small 6-pin serial connector on the back of the HP-15C Limit Edition (see picture above) looks suspiciously like the one found on the HP-30b. So there is some chance that the HP-15C uses a Atmel AT91SAM7L128 30 MHz processor as well.|
|Display||10 digit 7 segment LCD display plus sign and annunciators|
|Special features||Full support for complex numbers. Matrix operations. Root finding (solver). Numerical integration. Gamma function.|
|Original Pricing, Production||1.7.1982 ($135) - 1.1.1989 ($80).
Limited Edition mid 2011 until now ($100)
|Batteries||3x small button sized cells, 2x large button cells for the new "HP-15C Limited Edition"|
|Dimensions||Length 7.9cm, Width 12.9cm, Height 1.5cm|
Owner's Handbook, Nov 1985 (PDF, English, 293 pages, black&white)
HP-15C Owner's Handbook, June 1987 (Highres scan from the HP Support, English, 300 pages, 77 MByte, color)
HP-15C Advanced Functions Handbook, Aug 1982 (PDF, English, 224 pages, black&white)
HP-15C Advanced Functions Handbook, Aug 1982 (PDF, English, 224 pages, color)
HP Journal, Scientific Pocket Calculator Extends Range of Built-In Functions, May 1985 (PDF)
Quick Reference (PDF, English, 11 pages)
HP-15C Owner's Handbook (Edition 2.4, dated Sep 2011, 288 pages)
HP-15C Owner's Handbook (Edition 2, dated May 2011, 288 pages. This version was shipped on a CD-ROM with the calculator)
rpn-calc by Michael Steinmann, see his HP-15C plans in the Comment section below.
HP-15C on German Wikipedia
HP-15C emulator for Windows/Mac/Linuc from Torsten Manz (performance index 1.1)
|Comment||HP's last Voyager model. One of the ultimate best calculators ever made! Comes with a wealth of pre-programmed functions hardly seen in any other calculator, see special features above. Its programming model is similar to the HP-11C but offers more progam space, more labels, more flags etc.|
|HP-15c Limited Edition||Mid 2011: Michael Steinmann (rpn-calc) plans to have a HP-15C hardware clone (!) available by end of 2011.|
August 2011: Rumours surfaced that HP is going to produce a "limited edition" version of the HP-15C! This is of course great news but a sad end for Michael's ambitious project. Or maybe not, Michael announed a credit card sized version of the 15C called the DM-15CC. Not a bad idea!
November 2011: A brandnew version of the HP-15C manual showed up on the HP support page. The calculator itself is listed for $99.99 but there are no links to actually purchase it.
December 2011: The HP-15C is listed for purchase on HP's web site - but whenever I looked there it said "out of stock". Meanwhile, first units show up on ebay - way more expensive than a hundred dollars!
Januar 31, 2012: The HP-15C is finally available, so I could order two units!
Note: Recently (3/2012) I found note on www.finseth.com dated 9/2003 which suggests that HP all along has had plans to release a batch of 10,000 units for the 30th anniversary of the HP-15C.
2/2012 the two new "Limited Edition" HP-15Cs finally arrived! The
CD-ROM contained a HP-15C emulator for Windows which installed without
problems (the quite lengthy registration code was printed on a label
on the CD-ROM).|
The calculator's software apparently did not change: The number of registers stayed the same, as well as the "Forensic Result". But the speed did increase quite a bit, the new version is more than 70 times as fast as the old HP-15C!
|Apparently, there are some software differences between the classic HP-15C and the LE version. On the MoHPC you can find a list of bugs not present in the classic 15C.|
I tried some of the procedures mentioned there and apparently my units purchased in early 2012 still show these problems.
|September 2015: Michael Steinmann didn't give up on the DM15L clone of the HP-15C!!|
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