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What's been added in RPN-34 CE
For its price ($150 in 1979), the HP-34C was a remarkable calculator. It was the first pocket calculator to offer integration and root finding. Also, for the first time on an HP calculator, the factorial function could be applied to non-integer numbers.
RPN-34 CE enhances the HP-34C in many ways:
MEMORY |
HP-34C |
RPN-34 CE |
| Register Arithmetic |
For STO operations only
RCL ∑+ only |
For both STO and RCL operations. Includes double-register ∑+ (R1 and R3) working with stack registers X and Y. |
| Registers R20…R99 |
Not available |
Enabled in Settings.
Addressed indirectly via register I.
If enabled, register I is separate, not R20. |
| P≷S |
Not available |
Swap primary and secondary registers |
| Availability |
Shared with program memory; no registers at max. program memory size |
All registers available at all times. |
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| FUNCTIONS |
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| Hyperbolics |
Not available |
SINH, COSH, TANH and inverse |
| ATAN2 |
Not available |
Quadrant-preserving atan(x) |
| LOGy |
Not available |
Base y log of x |
| LN x! |
Not available |
Logarithm of factorial of x |
| RND |
Not available |
Round x to displayed value |
| MOD |
Not available |
Remainder of y/x |
| ODD |
Not available |
Return 1 if x is odd |
| DIV |
Not available |
Return integer part of y/x in x, remainder in y. |
| CSGN |
Not available |
Generalised sign of x |
| NOP |
Not available |
No operation |
| ERRU |
Not available |
Programmed error stop |
| TIME |
Not available |
Current time in H.MS format |
| RAND |
Not available |
Create random integer number |
| MIN |
Not available |
Return lesser of x and y in x |
| INCR, DECR |
Not available |
Increment/Decrement x |
| BEEP |
Not available |
Produce sound (0…9) |
| EXMNT |
Not available |
Return mantissa and exp of x |
| SEPx |
Not available |
Returns fractional and integer part of x |
| CMAG |
Not available |
Change magnitude of y by x |
| F?, SF, CF |
Flags 0…3 only |
Flags 0…9 |
| SOLVE n |
n = 0…3 only |
n = 0…9 |
| x≷ |
Not available |
Exchange x with any main register |
| x≥y, x<y, x≥0, x≤0 |
Not available |
Yes |
| (see also "Top Bar" at right) |
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| PROGRAMMING |
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| Program steps |
70 with 20 registers available
210 with no registers available |
999 with 100 registers available |
| Labels |
LBL 0…LBL 9, A, B |
LBL 0…LBL 9, A, B
LBL.0…LBL.9 |
| Save, load, annotate, view, print, share programs |
Not available |
Yes |
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| USER INTERFACE |
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| Prefix keys |
Active if pressed |
Active if pressed. Deactivated if pressed again. Indicators show state. |
| Register view |
Not available |
All basic registers shown on single screen including formatted display.
Run/Stop and single-step program without leaving register view. |
Decimal Point,
Thousands separator |
Fixed to "."
Thousands separator shown as comma |
User-selectable representations |
| Trig Mode display |
No |
Trig modes RAD and GRD show up in display |
| Command display |
Not available |
In program mode or while single-stepping, current command is shown as text below display |
| Current step display |
Not available |
Current program step is shown below display |
| Program memory fill status |
Not available |
Red progress bar shows amount of program memory filled |
Optional Programming and Top Bar keys:
With f prefix key active:
With g prefix key active:
With h prefix key active:
Notes on the Integrate Function
In order the keep computation time at a reasonable level, the HP-34 calculates integrals to as many digits as
are defined by FIX or SCI. When returning the result in X, the corresponding uncertainty appears in Y.
RPN-34 CE computes integrals by using Gauss-Legendre Quadrature, with the number of sample points chosen by the user in Settings.
The value returned in Y simply reflects the chosen accuracy:
Integration Accuracy Setting
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Norm |
High |
Best |
Points
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256 |
512 |
1024 |
Y
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2 |
1 |
0 |
• The current setting is saved as part of a program.
• The default value is Best.
NOTE
PAUSE and R/S instructions inside a function are ignored when called by SOLVE or INTEGRATE. |
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Getting data into RPN-34 CE |
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You can preset RPN-34's registers with data created externally without having to type them in. |
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Simply prepare the data in text format in any app that can handle text, like Notes, Mail and many others. |
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The data format looks like this: |
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Rn or R.n value (where n = 0…9) |
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Example:
To set R1 = 4.5, R6 = 6.28E-7, R.3 = 439, prepare your data like this: |
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R1 4.5
R6 6.28e-7
R.3 439
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Select all of the text and paste. |
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Notes:
Upper-/lower-case is ignored.
One or more blanks or tabs may follow the register number.
M may be used in place of R.
R.n may also be written as R1n, e.g. R.3 is the same as R13.
The order of the registers is irrelevant.
Unlisted registers are left untouched.
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Top Bar |
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Descriptions of the extra functions added to RPN-34 are built into the app:
– Open Settings, either by double-tapping the display, or by tapping the wrench symbol (top left).
– Select Dim or On, then tap on Operations. |
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Other g-Functions |
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Some g-shifted functions are shown directly on the appropriate keys:
- x≷ (key x≷y):
Swap x with any primary register R0…R9 or secondary register R.0…R.9
- P≷S (key EEX):
Swap primary registers R0…R9 with secondary registers R.0…R.9
- LN x! (key 0):
Compute logarithm of factorial.
x may be any positive number up to
4.4673259 × 1097.
Returns y and z such that x! = y * 10z
(where z = integer)
- PCut (key CHS):
(Available in PRGM mode only)
Cut an arbitrary range of program steps.
See section "Programming".
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Flags |
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Flags are numbered from 0 to 10.
Their state may be viewed in register view:
The register numbers display the state of same-numbered flags. If the flag is set, the number is highlighted.
Two flags, out of the 10 flags available, have special properties:
• F8 is auto-set by numeric user input.
• F7 and F8 are auto-cleared on test.
In addition, F8 is cleared by h RTN keyed in by user,
f PRGM, GTO+000, or by changing the PRGM/RUN mode
All flags are cleared by turning the calculator OFF.
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Comparisons |
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RPN-34, along with RPN-32 and RPN-38, are the only
HP-simulators before the HP-15C to offer all 12 possible comparisons. |
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Addressing Program Steps |
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To quickly address any program step
in both RUN and PRGM modes:
Enter GTO + nnn
where nnn is the desired step (3 digits)
To address the first program step 000:
In both RUN and PRGM modes:
Enter g TOP or GTO + 000
In RUN mode only:
Enter h RTN or f PRGM
To address the last program step:
in both RUN and PRGM modes:
Enter g END
–or–
Enter GTO . .
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Branching via the I-Register |
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If I<0, branch to (positive) step number I.
To branch to any label using the value stored in register I:
A. If Registers are set to 0..20 in Settings:
If I=0, branch to LBL 0
If I=1, branch to LBL 1
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If I=10, branch to LBL A
If I=11, branch to LBL B
If I=12, branch to LBL .2
If I=13, branch to LBL .3
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If I=19, branch to LBL .9
Note that indirect branching to labels .0 and .1 is not possible.
B. If Registers are set to 0..99 in Settings:
If I=0, branch to LBL 0
If I=1, branch to LBL 1
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If I=10, branch to LBL .0
If I=11, branch to LBL .1
If I=12, branch to LBL .2
If I=13, branch to LBL .3
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If I=19, branch to LBL .9
If I=20, branch to LBL A
If I=21, branch to LBL B
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