Extensions — Creating the no-holds-barred HP-67/97

With RPN-67/97 Pro's setting "Enhanced Calculator" ("Enhancements" on RPN-67 SD") set
to "Med" or "Max", a number of powerful extensions are added to the basic calculator.

New Functions

Most new functions may be accessed by executing OP (RPN-67: g OP, RPN-97: EXT OP).
Some are mapped to existing keys and show up after tapping g or h (RPN-97: EXT).
Almost all extended functions are programmable.


New Register Features

RPN-67/97 Pro features improved register arithmetic functions and adds one hundred storage registers.


More Labels

With 100 additional labels at your disposal, you'll never run out of labels in your programs again.


Toggle Flag Commands

RPN-67/97 adds handy toggle commands to the flag operations.
All commands are invoked by the prefix key DSP.
They are available to the regular flags F0…F3, as well as to the extended flags F4…F9.
  RPN-67   RPN-97   Description
  DSP h SF   DSP f STF   Toggle flag, then test if set
  DSP h CF   DSP f CLF   Toggle flag, then test if cleared
  DSP h F?   DSP f F?   Toggle flag






  Constants and Conversions

To use a constant or conversion: tap it, then tap "Select".
Or simply double-tap the key.

SI units are used, except where not applicable.

Physical constants reflect CODATA internationally recommended 2014 values.

Unit conversions follow a simple rule:
Convert TO SI unit Get conversion value, then multiply.
Convert FROM SI unit Get conversion value, then divide.


Convert 5 nmi (not SI) into meters (SI): 5 CC nmi × = 9260 [m]

Convert 2.5 kg (SI) into pounds (not SI): 2.5 CC   lb   ÷ = 5.51 [lbs]

Convert 1.2 litres (not SI) into cups (not SI): 1.2 CC   L   × CC cup ÷ = 5.07 [cups]


SI Base Units
Base Quantity Name Symbol
Length meter m
Mass kilogram kg
Time second s
Electric current ampere A
Thermodynamic temperature kelvin K
Amount of substance mole mol
Luminous intensity Candela cd





To use an operation: tap it, then tap "Select". Or simply double-tap the operation.

All operations, with the exception of COMPRS and UNCOMPRS are programmable.

If "Cplx" appears in the top-right corner, the function can handle complex arguments.

00 NOP No operation. Useful in testing and debugging programs.  
01 CPLX? Returns 0 if complex mode is off, 1 otherwise.  
02 BEEP Sounds a short tone.  
03 ERROR Stops program and displays "Error" message.  
04 MAX STEPS Sets maximum number of programs steps according to x: 1 = 224, 2 = 448, 3 = 999.
Returns current setting for any other value of x, e.g. 0.
Same as "Number of Program Steps" in settings.
05 CSGN Generalized sign of x (-1 if x < 0, 0 if x = 0, 1 if x > 0). SIGN(5.3) = 1, SIGN(-4) = -1, SIGN(0) = 0
06 DECR Decrements x by 1. Useful when testing flags and conditions. DECR(0) = -1
07 INCR Increments x by 1. Useful when testing flags and conditions. INCR(5.3) = 6.3
08 CHG MAG Change magnitude of y by x: if y is positive, then add x, otherwise subtract x. y = 5, x = 3: CHG MAG = 8
y = -5, x = 3: CHG MAG = -8
09 ODD Returns 1 if integer part of x is odd, 0 otherwise. ODD(2) = 0, ODD(-5.3) = 1
10 FLOOR Returns the greatest integer less than or equal to x. FLOOR(5.3) = 5, FLOOR(-5.3) = -6
11 CEIL Returns the smallest integer larger than or equal to x. CEIL(5.3) = 6, CEIL(-5.3) = -5
12 MIN Returns the lesser of x and y in X, the greater in Y.
In complex mode, compares absolute values of x+jy and z+jt.
x = 7, y = 2. MIN: x = 2, y = 7
13 MAX Returns the greater of x and y in X, the lesser in Y.
In complex mode, compares absolute values of x+jy and z+jt.
x = 7, y = 2. MAX: x = 7, y = 2
14 CLIP Returns x clipped (limited) to between y and z. x = -3, y = 10: CLIP(-20) = -3, CLIP(20) = 10, CLIP(3.14) = 3.14
15 CHOP Returns 0 if absolute value of x is less than 5E-10. Useful for eliminating floating-point representation errors. For example: 7.005 + 1 - 8.005 = -1.78E-15 instead of 0. CHOP(1/12!) = 2.09E-9, CHOP(1/13!) = 0
16 RESCALE Returns x rescaled to run from 0 to 1 over the range y to z. y = 6, z = 22: RESCALE(6) = 0, RESCALE(22) = 1, RESCALE(14) = 0.5
17 EXP/MANT Returns in X the exponent, in Y the mantissa of x. EXP/MANT(325 EEX 5) = 7 (in X), 3.25 (in Y)
18 MOD Modulo function: returns the remainder of y divided by x.
The result always has the same sign as x.
MOD(5.6,1.2) = 0.8, MOD(-5.6,1.2) = 0.4
19 GCD Greatest common divisor of positive integers x and y. GCD(164,88) = 4, GCD(328,3567) = 41
20 LCM Least common multiplier of positive integers x and y. LCM(24,124) = 744
21 DIV For two numbers x and y, returns the integer part of y/x in x, the remainder in y. DIV( 5.6, 1.2) = ( 4, 0.8)
DIV(-5.6, 1.2) = (-5, 0.4)
DIV( 5.6,-1.2) = (-5,-0.4)
DIV(-5.6,-1.2) = ( 4,-0.8)
22 %TOT Returns the % of y that is represented by x. y = 7, x = 7: %TOT = 100, y = 15, x = 12: %TOT = 80
23 ATAN2 Calculates atan(y/x), with the quadrant of point (x,y) preserved y = 1, x = 1: ATAN2 = 45°, y = -1, x = -1: ATAN2 = -135°
24 RATIO Convert x to a close rational y/x, with numerator and denominator limited to y (1E6 if y = 0 or non-integer). y = 1000, x = π: RATIO = 355/113
25 CB ROOT Returns the cube root of x. 27 = 3, ∛ = -1.46
26 CONJUG Returns the conjugate of complex number x + iy.
May be used to change the sign of y directly.
27 LOGy Returns the base y logarithm of x. LOG2(256) = 8; LOGπ(√3) = 0.47986
Complex: LOG(1+i)(1.49+4.13i) = 2.00-1.00i
28 QUAD EQ Solves the quadratic equation ax² + bx + c = 0. Arguments: a in Z, b in Y, c in X. Solve x² - 2x + 2 = 0: x = 1 ± 1i (CPLX indicator appears)
29 CUBE EQ Solves the cubic equation ax³ + bx² + cx + d = 0.
Arguments: a in T, b in Z, c in Y, d in X.
On return: t = type of roots (1: one real, two complex; 2: three real, at least two equal; 3: three real and distinct; 0: not a cubic equation)
Solve x³ - 4x² + 8x - 8 = 0:
x₁ = 2, x₂ = 1 + √3i, x₃ = 1 - √3i,
root type is 1 (CPLX indicator appears)
30 LIN EQ 2 Solve linear equation in two unknowns ax+by=c, dx+ey=f.
Inputs: a,b,c = R4,R5,R6, d,e,f = R1,R2,R3.
31 LIN EQ 3 Solve linear equation in three unknowns a11x+a12y+a13z=b1, a21x+a22y+a23z=b2, a31x+a32y+a33z=b3.
Inputs: a11,a12,a13 = R7,R8,R9, a21,a22,a23 = R4,R5,R6, a31,a32,a33 = R1,R2,R3, b1,b2,b3 = RA,RB,RC
32 GAMMA Returns the value of the Gamma function Γ(x). Works in complex mode. Γ(10) = 362880 (= 9!). Γ(-2.33) = -1.32.
Γ(3+1.2i) = 0.622 + 1.386i
33 EULER Φ Returns number of positive integers not exceeding x that have no common divisors with x. Φ(100) = 40, Φ(101) = 100
34 FIBONACCI Returns generalized Fibonacci numbers Fib(x) for x integer, real or complex. Fib(10) = 55, Fib(-π) = 1.9293
Fib(480.16) = 9.95 × 1099
Fib(3+1.2i) = 3.507 - 0.216i
35 HARM NUM Returns the xth Harmonic number for any real and positive x. H(0) = 0, H(3) = 11/6 = 1.8333, H(π) = 1.8727
36 BesselJ Calculates the Bessel function of the first kind Jy(x). Order y = positive integer. J2(1) = 0.1149, J5(π) = 0.05214
37 BesselY Calculates the Bessel function of the second kind Yy(x). Order y = positive integer; x > 0. Y2(1) = -1.6507, Y5(π) = -1.6235
38 Py,x Permutations of y objects taken x at a time. P7,5 = 2520, P500,37 = 1.8569 × 1099
39 Cy,x Combinations of y objects taken x at at time (Binomial Coefficient) P7,5 = 21, C500,37 = 1.3491 × 1056
40 LIN REG Calculates the linear regression y = ax + b. x,y pairs are entered using the ∑+ key.
Results: x = a, y = b, z = correlation coefficient, t = covariance.
Use OP CLR ∑ to clear statistics registers
41 ŷ,r LIN REG: return in X the linear estimate for y, given an x value in X.
Returns correlation coefficient in Y.
42 x̂,r LIN REG: return in X the linear estimate for x, given a y value in X.
Returns correlation coefficient in Y.
43 NORM DIST Normal Distribution (Gaussian Probability Function) with mean µ = 0 and standard deviation σ = 1. Returns probability density function φ(x) in X, cumulative distribution function Φ(x) in Y. φ(2.22) = 0.03394, Φ(2.22) = 0.98679
44 BIN DIST Binomial Distribution f(x).
Inputs: z = n (number of trials), y = p (success probability in each trial), x = argument.
Galton box with 8 layers (n = 8, p = 50%, nine bins numbered 0..8). Probability that ball ends in central bin (x = 4): f(4) = 70/256 = 0.27344
45 NBIN DIST Negative Binomial Distribution.
Inputs: z = p (success probability in each experiment), y = r (number of failures until experiment is stopped).
To verify the example "Selling candy" at the bottom of this Wiki page, enter p = 0.4, r = 5, x = n-5.
46 BVAR DIST Bivariate Normal Distribution f(x,y).
Inputs: µ1 ➞ R.91, µ2 ➞ R.92, σ1 ➞ R.93, σ2 ➞ R.94, ρ ➞ R.95
µ1 = -1, µ2 = 1, σ1 = 1.5, σ2 = 0.5, ρ = 1.7
f(1,2) = 0.04004
47 POISSON Poisson Distribution f(x).
Inputs: y = λ (expected value of x; must be larger than 0). x = positive integer.
λ = 2.8: f(7) = 0.01628
48 CHI-SQ Evaluates χ² for a range of data pairs for goodness of fit. Input values:
R.y through R.z = range of observed frequencies, R.x = start of corresponding range of expected frequencies
Oi: 9.6, 46.75, 51.85, 54.4, 8.25, 9.15
Ei: 8, 50, 47, 56, 5, 14
χ² = 4.8444
49 TPAIRED T Statistics: returns t for paired observations. Data pairs are entered using the ∑+ key. Use OP CLR ∑ to clear statistics registers
50 MEAN GRP Calculates weighted mean (in X) and standard deviation s (in Y) of grouped data.
Input: Use ∑+ with value in X, weight in Y.
Use OP CLR ∑ to clear statistics registers
51 SKW/KURT Skewness γ1, Excess Kurtosis γ2 and Moments mi for grouped and ungrouped data.
Input: Use ∑+ with value in X, weight in Y (set to 1 if ungrouped data).
Returns: X = γ1, Y = γ2, Z = m1 (mean), T = m2, RA = m3, RB = m4
Use OP CLR ∑ to clear statistics registers
52 ERF,ERFC Returns the value of the error function erf(x) in X, the value of the complementary error function erfc(x) in Y.
Note that Φ(x) = ½ + ½ erf(x/√2) [see cumulative distribution function PROB].
erf(3) = 0.99998
erfc(3) = 2.20905E-5 = 1 - erf(3)
53 NORM Normalizes the vector [R1 R2 R3]. NORM([3 1 2]) = [0.802 0.267 0.535]
54 ANGLE Returns the angle between vectors [R1 R2 R3] and [R4 R5 R6]. ANGLE([2 -3 4],[5 2 1]) = 74.26°
55 DOT Returns the dot product of vectors [R1 R2 R3] and [R4 R5 R6]. DOT([2 -3 4],[5 2 1]) = 8
56 CROSS Returns the cross product of vectors [R1 R2 R3] and [R4 R5 R6] in [X Y Z]. CROSS([2 -3 4],[5 2 1]) = [11 -18 -19]
57 STO REGS Store primary registers R0...R9 in extended registers starting at R.x (x = 0...99).  
58 RCL REGS Load primary registers R0...R9 from extended registers starting at R.x (x = 0...99).  
59 XCH REGS Exchange primary registers R0...R9 with extended registers starting at R.x (x = 0...99).  
60 MAT SET Set all elements of 3x3 matrix [R1..R9] to x. Use with MAT ADD to add a value to all elements of matrix [R.91...R.99].
61 MAT + Add x to all elements of 3x3 matrix [R1..R9].  
62 MAT × Multiply all elements of 3x3 matrix [R1..R9] by x.  
63 MAT ADD Adds 3x3 matrix [R.91..R.99] to [R1..R9].  
64 MAT SUB Subtracts 3x3 matrix [R.91..R.99] from [R1..R9].  
65 MAT MUL Replaces 3x3 matrix [R1...R9] with [R1...R9] • [R.91...R.99]. ({3,4,5},{4,5,6},{5,6,7}) •
({3,4,5},{4,5,6},{5,6,7}) =
66 MAT T Transposes the 3x3 matrix [R1...R9].
Row1: R1...R3, row2: R4...R6, row3: R7...R9
T({3,4,5},{4,5,6},{5,6,7}) = {3,4,5},{4,5,6},{5,6,7}
67 MAT DET Returns the determinant of the 3x3 matrix [R1...R9].
Row1: R1...R3, row2: R4...R6, row3: R7...R9
DET({3,4,5},{4,5,6},{5,6,7}) = 0
Area of triangle with vertices (0,0),(4,0),(4,3):
DET({0,0,1},{4,0,1},{4,3,1}) / 2 = 6.00
68 MAT INV Inverts the 3x3 matrix [R1...R9].
Row1: R1...R3, row2: R4...R6, row3: R7...R9
INV({3,4,5},{4,5,6},{5,6,7}) = Error
(Matrix is singular.)
69 MAT EIG Returns in x,y,z the Eigenvalues of the 3x3 matrix [R1...R9].
If t = 1, two Eigenvalues are complex: y + iz, y - iz.
CHOP is applied automatically to the results.
Row1: R1...R3, row2: R4...R6, row3: R7...R9
EIG({3,4,5},{4,5,6},{5,6,7}) = {15.3899,-0.3899,0}
70 MAT STO Stores the 3x3 matrix [R1...R9] at extended registers [R.91...R.99].  
71 MAT RCL Retrieves the 3x3 matrix [R1...R9] from extended registers [R.91...R.99].  
72 x̂,s EXT Returns in X the mean and in Y the standard deviation of all numbers in extended registers R.x..R.y.  
73 CHOP EXT Change absolute values less than 5E-10 in extended registers R.x..R.y to 0.  
74 COPY EXT Copies extended registers range R.y...R.z to R.x.  
75 FILL EXT Fills extended registers range R.y...R.z with x.  
76 FIND EXT If flag 9 is cleared:
Returns in x the first register number containing x in extended registers range R.y...R.z (-1 if not found). Returns in y the number of occurrences of x in the range.
If flag 9 is set:
Returns in x the first register number not containing x in extended registers range R.y...R.z (-1 if all registers contain x). Returns in y the number of occurrences of values different from x in the range.
Check if registers 40..59 contain only zeros:
x = -1, y = 0: answer is YES
x = 44, y = 3: answer is NO
(first diff. value at R.44, 2 more in range)
77 MIN EXT Returns in x the smallest value in extended registers range R.x...R.y, returns in y the register number.  
78 MAX EXT Returns in x the largest value in extended registers range R.x...R.y, returns in y the register number.  
79 PRT EXT Prints the values in extended registers range R.x...R.y on paper tape.  
80 RAN# EXT Fills extended registers range R.x...R.y with random numbers between 0 and 1.  
81 RDUP EXT Removes duplicate values in extended registers range R.x...R.y. Returns in x,y the range containing all unique values.  
82 REV EXT Reverses the order of values in extended registers range R.x...R.y.  
83 SORT EXT Sorts the values in extended register range R.x...R.y in ascending order. If z = -1, sorts in descending order.  
84 SUM EXT Returns the sum of all values in extended registers range R.x...R.y.  
85 PLOT Prints a "+" at position x on paper tape (x = 0...20). Prints empty line if x is out of range.  
86 PLOTC Prints up to four characters on paper tape, starting at position x (x = 0...20). Characters are stored as decimal ASCII codes (reduced by 32) in the fractional part of x.
To easily create the argument value, use the built-in TEXT Helper (see below).
Print "Plot" at position 9: x = 9.48767984
("P" = ASCII 80, minus 32 = 48, "l" = ASCII 108, minus 32 = 76, etc.)
87 TEXT Print up to 21 characters stored in extended registers R.x...R.x+6. Format: d.aaabbbccc, 0.aaabbbccc, 0.aaabbbccc etc., where aaa, bbb, ccc = decimal ASCII codes (0 ends string). Text alignment: left if d < 0, center if d = 0, right if d > 0. d must be single-digit.
To easily create the required values, use the built-in TEXT Helper (see below).
To print "RPN-67 for iPad" centered, store these values in registers 90...95: 0.082080078, 0.045054055, 0.032102111, 0.114032105, 0.080097100, 0. Set x = 90, execute TEXT. Change the integer part of R.90 for different alignments.
88 PRT FRAC Prints the fractional part of x as an integer. The number of digits is defined by the DSP setting. Leading zeros are added if necessary. The sign of x is preserved.
Ignored if display mode is not FIX, or if the absoulute value of x is 1E10 or larger. Setting DSP 0 results in an empty line.
PRT FRAC(3.1416) = 1416 (DSP 4)
PRT FRAC(445566.789) = 007890 (DSP 6)
PRT FRAC(445566.789) = 8 (DSP 1)
PRT FRAC(-0.000236) = -00024 (DSP 5)
89 PRT PWR Turns printer OFF or ON according to x.
0: turn power OFF
1: turn power ON
If ON, makes sure that the printer is visible on RPN-67 Pro.
-1: turns power ON and shows printer (RPN-67 SD only)

Returns current power status if x is not 0 or ±1.
x =  0: turn printer power OFF
x = -1: turn printer ON and show it
90 PRT MODE Sets printer mode according to x = m.csdf:
m: 1 = MAN, 2 = TRACE, 3 = NORM.
    If m is negative, negative results are printed in red.
c: 0..9 = color (see command SYS/INFO below)
s: printer refresh control: (ignored on RPN-67 SD)
    0 = normal
    1 = no printer updates until program has stopped running
d: don't print decimal point if last in string
    0 = normal
    1 = trailing decimal point is suppressed
f: dot-matrix font in vintage mode
    0 = off
    1 = on

Returns current mode for illegal values of m.csdf, e.g. 0.
Set printer to MAN mode, print in blue, negative results in red:
-1.2    PRT MODE

To toggle negative-red printing:

To turn on DP suppression (if off):
0    PRT MODE    0.001    CHG MAG    PRT MODE

To turn off DP suppression (if on):
0    PRT MODE    -0.001    CHG MAG    PRT MODE

To turn vintage mode dot-matrix font on (if off):
0    PRT MODE    0.0001    CHG MAG    PRT MODE
91 DSP MODE Sets display mode according to x = m.ds:
m: 1 = FIX, 2 = SCI, 3 = ENG. If m = -1, don't show thousands separators.
d: number of digits
s: integer/fractional part separating character:
    0 = auto (according to region defined for the device)
    1 = "." (separator changed to "," if necessary)
    2 = "," (separator changed to "." if necessary)

Returns current mode for illegal values of m.cs, e.g. 0.
To toggle thousands separators display:
92 TRIG MODE Sets trigonometric mode according to x: 1 = DEG, 2 = RAD, 3 = GRD.
Returns current trigonometric mode for any other value of x, e.g. 0.
93 CLR F4-9 Clears flags 4 through 9.  
94 CLR ∑ Clears the statistics registers.  
95 CLR TAPE Inserts a new roll of paper..  
96 SOLAR Returns sunrise (in X), sunset (in Y), sun transit (noon) (in Z), and altitude of the sun (in T) for a given location, date and time.
R0 = year (-2000 to 6000), R1 = month, R2 = day,
R3 = hour (24hr-format), R4 = minutes, R5 = seconds, (for altitude)
R6 = time zone (negative if west),
R7 = longitude (decimal degrees), R8 = latitude (decimal degrees)

Note: SOLAR accepts additional parameters and returns much more information - see box below.

Get sun position data for Salem, OR, on Nov 30, 2013, 12 a.m.
Longitude is 123° 2' W, latitude is 44° 56' N,. Time zone is UTC minus 8.
f CLREG  2013  STO 0  11  STO 1  30  STO 2
12  STO 3 -8  STO 6  -123.02  →H  STO 7
44.56  →H  STO 8  OP SOLAR

x = 7.4855 = 7:29:08 (sunrise)
y = 16.5489 = 16:32:56 (sunset)
z = 12.0161 = 12:00:58 (noon)
t = 23.3026° = 23°18'09" (altitude at 12 a.m.)


Sets or returns system settings, depending on the value x. Accepted values are:
-1: Get current printer color
0...9: Set printer color to x
10: Prints the locations of all labels in the current program, as well as the status of flags F0...F9. Returns in x the number of unused labels.
11: Same as 10 with printout suppressed.
20: Prints breakpoints information. Returns in x the number of stored breakpoints.
21: Same as 20 with printout suppressed.
30: Prints and returns in x the number of free program steps.
31: Same as 30 with printout suppressed.
40: Turn large digits off. (RPN-67 SD: Normal display mode)
41: Turn large digits on. (RPN-67 SD: High-contrast display mode)
80: Returns location data. X: latitude, Y: longitude, Z: altitude (in meters), T: current system time zone (in days, including DST)
90: Prints and returns in x the battery level (in %).
91: Same as 90 with printout suppressed.
98: Prints and returns in x the version number of RPN-67/97. The exponent shows the calculator type (67 or 97.) Tip: use EXP/MANT to separate the values.
99: Same as 98 with printout suppressed.
100: Turn turbo mode off.
101: Turn turbo mode 1 on. This will suppress display and register updates while the program is running. Very useful for expediting time-consuming calculations.
A red flash symbol in the display indicates that turbo mode is enabled. It turns green while the program is running. Output is not suppressed for printing or while pausing. Turbo mode ends automatically when program execution is stopped.
102: Turn turbo mode 2 on. Same as mode 1, but turbo mode does not end automatically when program execution is stopped. It must be turned off by issuing SYS/INFO command 100, or by tapping RTN when the program is not running (i.e. the flash symbol is shown in red.)
(Note that turbo mode is ignored on RPN-67 SD, as it serves no purpose on the iPhone.)

Printer colors:
0 = black,  1 = gray
2 = blue,   3 = light blue
4 = green,  5 = light green
6 = red,    7 = light red
8 = purple, 9 = light purple
98 COMPRS Compress program memory by storing numbers in a single step.
This command is not programmable.
99 UNCOMPRS Uncompress memory by storing numbers in one step per digit.
This command is not programmable.


  Advanced Use of SOLAR

SOLAR expects parameters in all primary registers, i.e. R0...R9, and RA...RE.
Results are returned on the stack and in the secondary registers (RS0...RS9).

must be passed according to the table at right.

Results are returned as follows:
Register Value Unit
Stack T Local altitude (atmospheric refraction corrected) [degrees]
Stack Z Local sun transit time (solar noon) [fractional hours]
Stack Y Local sunset time (± 30 seconds) [fractional hours]
Stack X Local sunrise time (± 30 seconds) [fractional hours]
RS0 Local azimuth angle (eastward from north) [degrees]
RS1 Local sun right ascension [degrees]
RS2 Local sun declination [degrees]
RS3 Sunrise hour angle [degrees]
RS4 Sunset hour angle [degrees]
RS5 Sun transit altitude [degrees]
RS6 Greenwich sidereal time [degrees]
RS7 Surface incidence angle, as determined by parameters RC and RD (see table at right) [degrees]
RS8 Equation of time (difference between solar apparent and mean time) [minutes]
RS9 Julian day number  


Parameters & Error Codes
When "Error" appears, tapping any key reveals a code # indicating the error's cause.
Asterisked parameters, if invalid, will be set to a default value.
  # Reg Value Range
  1 R0 4-digit year -2000 to 6000
  2 R1 2-digit month 1 to12
  3 R2 2-digit day 1 to 31
  4 R3 Observer local hour 0 to 24
  5 R4 Observer local minute 0 to 59
  6 R5 Observer local second 0 to 59
  8 R6 Observer time zone (negative west of Greenwich) -18 to 18 hours
  9 R7 Observer longitude (negative west of Greenwich) -180 to 180 degrees
 10 R8 Observer latitude (negative south of equator) -90 to 90 degrees
 11 R9 Observer elevation -6,500,000 or higher meters
  * RA Annual average pressure 0 to 5000 millibars
  * RB Annual average temperature -273 to 6000 °C
  * RC Surface slope (measured from the horizontal plane) -360 to 360 degrees
  * RD Surface azimuth rotation (measured from south to projection of surface normal on horizontal plane, negative west) -360 to 360 degrees
  * RE Difference between earth rotation time and terrestrial time (typically 67 seconds) -8000 to 8000 seconds
Legal notice:
SOLAR is based on The Solar Position Algorithm, Copyright © 2008-2011 Alliance for Sustainable Energy, LLC, and is used by permission.




  Using TEXT Helper

Printing text on paper tape involves converting the text to suitable number values and executing OP TEXT or OP PLOTC operations.

TEXT Helper is an easy-to-use tool for generating the required numbers. (Not available on RPN-67 SD.)

Fetch existing text loads the text currently stored at the indicated location (if any) into the text field.

Alternatively, the generated code may be pasted into the calculator's display (in PRGM mode), or into the listing field of the Card Manager (in RUN mode.)

Using the value in the X-register, PLOTC prints up to 4 characters positioned anywhere on a paper tape line.
The integer part of the value defines the position. The alignment buttons may be used to insert the correct values for left, center or right alignment.

Available TEXT characters

All 3-digit numbers in the range 1 to 255 have been assigned to characters. (Note that 000 is used to denote the end of a string.)

A list of available characters and their codes may be produced anytime be running the program "Character Set for TEXT".

Alternatively, you may download the PDF version of the printer output.

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