Model:12CPt, differences from -12CGeneral:Name:PlatinumCode-Name:BondiIntroduction:Date:2003-05-?Price:$105Display:Annunciators:battery symbolbattery lowff-shiftBEGINbegin/end modeD.MYdate formatCcompound interestPRGMprogram modeALGALG modeRPNRPN modeMemory:Numbered-Registers:20 -> 7 (still)Program-Steps:0 -> 392User-RAM-Bytes:203Total-RAM-Bytes:281ROM-Bytes:7808Machine-State:prefix key statestack lift enabledisplay modeprogram counterthree level return stackradix markPRGM modeprogram / register memory dividerBEGIN/END modeD.MY / M.DY modecompound interest moderegistersmemoryalgebraic / RPN modePhysical:Power-Source:2 x CR2032Weight:?Temperature-Range:Operating:?Charging:noneStorage:?Key-Labels-f-gold-above::AMORTINTNPVRNDIRRRPN[][][][]|--BOND---||--DEPRECIATION--|PRICEYTMSLSOYDDBALG[][][][]|-------------- CLEAR ---------------|P/R\GSPRGMFINREGPREFIX[][][][]OFF[][][][]PREFIX[][][][]Key-Labels-g-blue-below::12x12\:-CFoCFjNjDATEBEGENDMEM[] x 2\v/xeLNFRACINTG\GDDAYSD.MYM.DYx-.wxPSEBSTGTOx\<=yx=0=x^,ry^,rn![][][][][][]=x-s\GS-LSTxProgrammable-Operations (new)::x^2square=for use in algebraicALGALG modeGTO 0-392go to program step (range change)RPNRPN modeNon-Programmable-Operations::ON + PMTreset calculator DELETED: there's now a small holenear the batteryBugs/ROM-Versions::Pressing f CLEAR-PRGM in run mode no longer resets the current programline to 000.Programs written in ALG mode can be run in RPN mode without warningand vice versa.Discovered by Tony Hutchins and Jordi Hidalgo:When program memory consists of at least 260 lines, the instructinsGTO n-255 through GTO 255 cause an Error 4, n being the last allocatedline: 260, 267, ... 393, 400 (but not 399).In the Fall of 2005, they started producing models with parentheseskeys.  There was no change in model number.Notes::(Much of the following by Jordi Hidalgo. Datafile V22N3p8-11)Algebraic mode has no precedence.  It also has no parentheses.  On theother hand, RPN stack operations work in this mode.Registers don't start getting converted to program memory until afterstep 310.There are also 10 new cash flow registers, CF21 through CF30.  They areconverted to program memory for steps 240 through 309.Storage register arithmetic is still only possible with registers 0 to4.The source code to the 12 software was lost and this is areimplementation.  Some things are faster, some are slower, andaccuracy is sometimes less.For example, f CLAR-FIN n=10 PV=100 PMT=-20 solve for i takes 15seconds on the -12C but 40 seconds on the 12CPt.  Re-solving for itakes 4 seconds on the -12C but still 40 seconds on the 12CPtManufactured by Kinpo Electronics.Tony Hutchins reports that LSTx in ALG mode works in this way:- LSTx LSTx leaves the stack unchanged.- L is only refreshed when a new calculation begins with a digit.A change in the keyboard was made in late 2005 to add parenthses keys.The early (non-parentheses version) also had a very poor solver: bothkeys and solver were fixed.  The newer version had backspace and undokeys.25th Anniversary edition, the 12CPA, to be released in mid- tolate-2006.A version called the HP12c Prestige was released in Brazil (andpossibly other parts of South America) only on or around2006-04-16. The bezel was gold and it said "Prestige" instead of"Platinum." This was the updated version of the 12cpt, withparentheses.The "gold" shift was orange.