allRPN Calc User Manual
Contents
1. PV PMT FV General Registers ro ri r2 r3 r4 r5 L LL Settings Registers displays calculator registers using current display format allRPN Calc Manual Acorn Aircraft Help allRPNCalc Display The top numeric line shows the contents of the y register The lower numeric line shows the x register The Green annunciators show the current calculator settings To change the settings touch angle mode annunciator to change between rad deg grad touch display mode annunciator once followed by 0 9 to change the number of digits to right of decimal point touch display mode annunciator twice to alternate between fix fract sci or eng touch Math Trig Stat Conv Prog Fin to change the upper 3 rows of keys on the keyboard The top right line of the display always shows the last operation performed Automatic Memory Stack The calculator features an automatic memory stack for performing all calculations It consists of 4 memory registers that operate together t top of stack allRPN Calc Manual 192. memory registers that operate together top of stack t Z y top line of calculator display x bottom line of calculator display The x register shows the result of the last operation Basic Operations The calculator uses reverse polish notation for it s operating logic You key in the numbers to be operated on followed by the operator To use any one number function 1 Key in the number 2 Touch the function key For example to calculate log 9 allRPN Calc Manual Acorn Aircraft touch 9 touch log To use any two number function 1 Key in the first number 2 Touch ENTER 3 Key in the second number 4 Touch the function key For example to calculate 4 2 touch 4 touch ENTER touch 2 touch Clearing To clear the x register touch the CLx key Number Entry Key in numbers by touching the number keys in sequence The decimal point must be keyed if it is part of the number Correct touching errors with the back arrow key CLx example to key 1 23 touch 1 2 3 Negative Numbers To key in a negative number touch the keys for the number then touch the key example to key 34 6 touch 3 4 6 Large Numbers Large numbers can be entered using E to key in an exponent To key in a negative exponent first touch E then the key example to key 2e 45 touch 2 E 45 Fractions To key in a fraction the parts of the fraction are separated by touching the decimal point example to key 1
3. of these functions refer to http h10032 www1 hp com ctg Manual c00363319 pdf Cash Flow Editor The cash flow editor displays the contents of the 80 cash flow registers in a scrolling list The columns of the list display the cash flow period j the value of the cash flow CF and the number of consecutive times the cash flow occurs N N must be in the range of 1 to 99 To edit a list entry touch the list to hi light the entry to be edited Then type in a new value and press ENTER Use the up down left and right arrow keys to move the selection To insert a new cash flow select a cash flow j by touching the list and then touch the insert key The cash flows from j to the end of the list are moved up one row and a new entry is initialized to 0 00 at j The 79th entry of the list is deleted To remove a cash flow select the cash flow by touching the list and then touch the delete key The cash flows above the deleted one are moved down by 1 row Anew 0 00 entry is made in the 79th cash flow To exit the cash flow editor touch any of the green annunciators Math Trig Stat Conv Prog Fin When you exit the cash flow editor the value of the financial register N is modified be the row number of the last non zero cash flow entry allRPN Calc Manual 14 Acorn Aircraft Conversions knots gt mi hr Mach lt veiociiy j KNO S mi ni Volume mi min e rotate left wheel to select conversion type e rota
4. y registers RI roll down moves y to x z to y tto z x tot LSTx returns value of x prior to last operation STO store x in a register 0 9 or 0 9 example STO4 STO 8 X for register arithmetic example STO 3 STO 2 RCL recall a register to x example RCL4 RCL 5 Math Functions Tf a h lnd lnd lnd ex 7 on 10 y nm E WU W Wo 5 intg abs rand 1 x In natural log for x gt 0 log logarithm base 10 for x gt 0 xvy x root of y if y lt 0 x must be an odd integer vx square root of x for x gt 0 KU cube root of x e natural antilog 10 base 10 antilog y y raised to x if y lt 0 x must be integer 0 x x squared x8 x cubed 1 x reciprocal x 0 frac fractional part of x allRPN Calc Manual Acorn Aircraft intg integer part of x abs Ixl absolute value rand random value 0 lt x lt 1 STO rand stores seed for random sequence mod remainder of y x clReg clears storage registers 0 9 0 9 clStk clears x y z t Trig Functions sin Sin Hyp A ne d COS COS rad tan tan gt deg sin sin x cos cos x tan tan x sin 1 arc sin x for Ixl lt 1 cos 1 arc cos x for Ixl lt 1 tan 1 arc tan x Hyp prefix for hyperbolic functions rad convert x from degrees to radians deg convert x from radians to degrees gt R convert x y from rectangular to polar P convert x y from polar to rectangular H convert x to decimal hours Hms convert x to H mmss
5. 3 4 touch1 3 4 allRPN Calc Manual Acorn Aircraft Number Display The x and y register are displayed according to the current display mode selected Display modes do not alter the underlying precision of the registers Fix Fix display shows a number with a fixed decimal position You can specify from 0 to 9 digits to be displayed to the right of the decimal point If you select 9 all available digits will be displayed The last digit on the right is the rounded result of the underlying number Numbers larger than what will fit in the Fix format are automatically displayed in Sci format Sci Scientific display shows a number with a leading significant digit followed by a decimal point and some number of additional digits raised to a power of 10 Eng Engineering display is similar to Scientific but the exponent is always divisible by 3 and the decimal point floats as needed Fract Fract display shows numbers as fractions The display of fractions can be controlled using settings described below Errors Various operations can result in an error These are displayed as nan nota number example log 1 inf infinity example 1 0 number too large for word size allRPN Calc Manual Acorn Aircraft Main Keyboard Functions ENTER stores new value in x register raises stack CLx clears x register edits during number entry changes sign of x i decimal point type a b c for the fraction a b c x lt gt y swaps X and
6. Hms y x where x y are in H mmss Hms y x where x y are in H mmss 172 constant Pi 2 TT constant Pi Aabc triangle solver see below note arguments and results of trig functions are in radians degrees or grads depending on the setting of the angle annunciator in the display Touch the annunciator to change the angle mode allRPN Calc Manual Acorn Aircraft Triangle Solver Start by pressing clr e Enter any 3 components of triangle by touching A B C or Za Zb Zc At least 1 entry must be a side A B C angles must conform to 0 lt angle lt 180 sum of angles entered must be less than 180 e After 3 components are entered others are computed Touch A B C or Za Zb Zc to recall values e area returns triangle area e Areturns triangle perimeter length e to enter a new triangle press clr amp repeat steps above note1 if there is more than 1 solution an additional button appears in the middle of the triangle Touch the button to select between the two solutions Recalled values will be for solution 1 or solution 2 depending on the selection button setting note2 inaccurate results can occur for small angles allRPN Calc Manual Acorn Aircraft Statistics Functions clr gt clears statistics registers n gt x gt x gt V S VS X Xy 2 accumulates x y in registers returns n 2 removes x y from registers returns n X Y mean of x y X W weighted mean Xr linear estimate x for y correlation c
7. alIRPN Calc 2008 2009 Ernest Brock Acorn Aircraft acornaircraft me com _http web mac com acornaircraft AcornAircraftSite Acorn_Aircraft html Table of Contents Display Automatic Memory Stack Basic Operations Number Display Main Keyboard Functions Math Functions Trig Functions Triangle Solver Statistics Functions Statistics Editor Statistics Plot Programmer s Functions Financial Functions Cash Flow Editor Conversions Information Screens About Settings Registers Help o On O OO a wo WO Q ak ak ak ak ak on O O a fF N GO O 19 Acorn Aircraft acornaircraft me com _http web mac com acornaircraft AcornAircraftSite Acorn_Aircraft html Acorn Aircraft Display The top numeric line shows the contents of the y register The lower numeric line shows the x register The Green annunciators show the current calculator settings To change the settings touch angle mode annunciator to change between rad deg grad touch display mode annunciator once followed by 0 9 to change the number of digits to right of decimal point touch display mode annunciator twice to alternate between fix fract sci or eng touch Math Trig Stat Conv Prog Fin to change the upper 3 rows of keys on the keyboard The top right line of the display always shows the last operation performed Automatic Memory Stack The calculator features an automatic memory stack for performing all calculations It consists of 4
8. oefficient r linear estimate y for x correlation coefficient s standard deviation x y 0 population standard deviation x y n gt recalls the number of samples gt x recalls gt x gt x2 recalls gt x2 Ly recalls gt y 2y recalls gt y gt xy recalls gt xy RCL gt 0 1 2 8 4 5 to recall n gt x gt x2 gt y gt VS gt Xy x min recalls minimum x value from list x max recalls maximum x value from list y min recalls minimum y value from list y max recalls maximum y value from list range ymax ymin xmax xmin Edit calls up the statistics edit display A maximum of 200 samples can be edited The edit display shows a 2 column list of x and y values Touch the list to edit a number Use the down and right arrow keys to move to the next value to edit The delete row key deletes the high lighted row Plot opens the statistics plot window see below percent x of y A percent change y to x T x percent of y total Cn r combination y items taken x at a time allRPN Calc Manual Acorn Aircraft Pn r permutation y items taken x at a time n factorial of x where x is an integer and 0 lt x lt 170 n gamma function F x 1 of non integer x Statistics Editor The statistics editor can store up to 200 samples Samples can be reviewed and edited in the editor window which is accessed by touching the Edit key Statistics Plot Forecast 18 6000 y 10 3150 Done Linear Log EXP Por The statistics plot wind
9. ow displays the current samples as red x marks and the fit line curve in yellow The equation for the fit curve is displayed in green y The correlation coefficient is displayed in the upper right corner in green allRPN Calc Manual 10 Acorn Aircraft Choose the fit model by touching the control at the bottom of the screen Forecast Enter either an x or a y value by touching the field labeled x or y at the top of the screen A keyboard will pop up for entering a value Touch the done key to enter the value and compute the opposite value Programmer s Functions hex dec oct Din lt lt gt gt xor and not or RL RR A B C D E F hex changes display base to 16 dec changes display base to 10 oct changes display base to 8 bin changes display base to 2 xor y exclusive or x and y and x not negates x or yorx lt lt shift x left 1 binary place gt gt shift x right 1 binary place RL rotate x left 1 binary place RR rotate x right 1 binary place note binary representation may exceed width of display in which case an annunciator will appear next to number Touch annunciator to move display left right 16 places note touch upper left annunciator to change word size between 8 16 32 48 bits allRPN Calc Manual Acorn Aircraft Financial Functions Annunciators touch payment mode annunciator to set payment mode to Begin or End for compound interest calculations involving payments touch odd period in
10. r computes number of periods in financial problem i stores or computes interest rate per compounding period mi stores the safe interest rate per compounding period for the MIRR calculation PV stores or computes the present value ie the initial cash flow PMT stores or computes payment amount FV stores or computes future value of a financial problem Note The current values of n i mi PV PMT and FV are displayed immediately above the keys Date changes a date in the Y register by the number of days in the X register and displays day of week in upper left corner ADYS computes the number of days between two dates in the Y and X registers 12x multiplies X register by 12 and stores result in n register 12 divides X register by 12 and stores result in i register CF opens the cash flow editor see below Price calculates bond price given desired yield to maturity YTM calculates yield to maturity given bond price SL calculates depreciation using straight line method SOYD calculates depreciation using sum of years digits method DB calculates depreciation using declining balance method Amort Table display an amortization table Touch the email button to email the amortization table Touch the Yearly button to show yearly allRPN Calc Manual 13 Acorn Aircraft sums the Monthly button to display monthly totals note the financial functions are modeled after the HP12c functions For a full description of the operation
11. te right 2 wheels to select conversion targets e touch left or right arrow to convert value in x allRPN Calc Manual Acorn Aircraft Information Screens y AV Ste STO Rel O touch i in lower right corner to flip to information screens About display the current version number allRPNCalc email tech support allRPN Calc Manual Acorn Aircraft Settings allRPNCalc Fraction Display 4096 LUGN denominator ON reduce fix denomimator Click Sound Full Stack Display on ES Number Format 1 234 00 23400 aT Update Currency Rates December 16 2009 GK g Settings Registers max denominator maximum denominator for fractions 1 lt md lt 10000 efix denominator form fractions using only multiples of 1 max denominator reduce reduce fractions to lowest common terms click sound turn on off keyboard click sound number format select between comma or period for separator between each 3 digits of mantissa and decimal radix character SI places a space between each 3 digits of mantissa and fraction Update Currency Rates touch this button to update the currency rates You must have a web connection to load the rates The date of the last update is displayed under the button Rates are from the International Monetary Fund web page http www imf org external np fin data rms_rep aspx allRPN Calc Manual 17 Acorn Aircraft Registers allRPNCalc t Z H x Istx n i
12. terest annunciator to set interest calculation method to Simple interest or Comp compound interest touch date annunciator to set date format to m dy or d my Amort Amortizes x number of periods using values stored in PMT i PV and the display Updates values in PV and n INT calculates simple interest NPV calculates the net present value of up to 80 uneven cash flows and initial investment using values stored with CTO Cfj and Nj Rnd rounds mantissa of X register to match the display IRR calculates the internal rate of return yield for up to 80 uneven cash flows and initial investment using values stored in the cash flow registers Note IRR can have multiple solutions if the cash flows change signs more than once In those cases an alert dialog is displayed showing all the found values but only the first value is returned If this situation occurs you allRPN Calc Manual 12 Acorn Aircraft should consider using MIRR as an alternative way of analyzing the cash flows MIRR calculates the modified internal rate of return yield for up to 80 uneven cash flows and initial investment using values stored in the cash flow registers MIRR 100 PosNFV NegNPV 1 n 1 where PosNFV future value of positive cash flows using the interest rate stored in i NegNPV net present value of negative cash flows using the safe investment rate mi clrFin clears n i pv pmt fv and the 80 cash flow registers n stores o
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