|Type, Precision, Input
||Scientific, 12 BCD digits, exponent ±499,
Algebraic and Reverse Polish Notation
|CPU & Memory
||Atmel AT91SAM7L128 30 MHz processor.
On the picture of the unit's back side you can see below the
batteries the small connector for the serial cable used
to flash the Atmel CPU. Looks identical to the HP-15C Limited Edition
or 8 stack levels, 112 registers and flags, 31-byte alpha register for
text, 925 program steps in RAM, several thousand byte flash memory,
plus local registers.
Program-local registers - this has neven been available in any
||Two row display: On top left side a 43x6 dot
matrix, on the right side various annunciators.
On the bottom 12 digit 7 segment black&white LCD mantissa plus
3 digit exponent.
||Countless numbers! It largely features the same
operations as the HP-42S
plus additional capabilities. According to the WP-34S manual the HP-42S
manual is a good starting point to learn about the 34S.
Software written by Paul
Dale (Australia) and Walter
Bonin (Germany) and others.
100 Euro in 2012, produced since 2011 (according to the manual the
development started at the end of 2008, beta test phase began mid 2011).
||2x large button sized cells, 3V
||Length 15cm, Width 7.7cm, Height 1.7cm
|Local Links (restricted)
||V3.1 manual: 3.0
Owner's Manual (PDF, 211 pages, dated 1.12.2012 on server)
V3.0 manual: 3.0
Owner's Manual (PDF, 118 pages)
Beginner's Guide (PDF, "Draft 2.06821~ Firmware: 34S 3.1 2932", 187 page - quite a lot for a beginner's guide!)
Command Aliases (PDF)
Hompage on sourceforge.net.
files on sourceForge.net.
WP-34S on the TheCalculatorStore.
|Forensic Result||9.00000000003 (9 + 2.9361e-11)|
||The hardware of this cool device is a HP-30b (or HP-20b).
However, a group of enthusiastic programmers has rewritten the unit's
operating software to become a versatile scientific calculator!
Obviousely, the normal button labels won't match the abilities of the
new software. Consequently, the unit is sold with a reflashed ROM plus
a set of sticky labels.
This is absolutely awesome!! It is named after the famous HP-34C calculator.
software is an OpenSource project and whoever is interested can check
out the C code from SourceForge using subversion.
- It seems that stepping very quickly thru a program crashes the unit! In
this case the only thing that can be done is to press the reset button
thru the small pinhole on the back of the calculator (remove battery
cover). All memory will be lost.
A similar thing occured when I repeatedly issued the "FILL" command.
|Notes||The installed firmware version can be queried per "VERS" command in the X.FCN menu.|
The installed version as of 2/2013 is "3.0 2672"
|The operation and programming scheme of the
WP-34S is closely related to the HP-42.
Storage register access:
- Using the SSIZE4 and SSIZE8 commands in the MODE menu
you can switch between a 4-level and 8-level stack.
- The stack registers are named X, Y, Z, T plus A, B,
C, D if in 8-level mode.
- L is the last-x register.
complex mode additional registers I, J, K are used where I
the "last-y" register (the imaginary part of a complex number stored in
x & y).
- The stack registers occupy numbered registers 100 ..
111 in the following order: X Y Z T A B C D L I J K.
- The "g SHOW" commnd can be used to see register
- The REGS? command in the TEST menu shows the number
of global registers (usually 100). The REGS command in the MODE menu
controls the number of global registers. There can be at most 100.
Reducing the number of globel registers frees memory which can be used
for local registers or program data.
- See also "Local Storage Registers" further down.
- Summation registers are separately allocated and are
not accessible by STO/RCL.
- Register numbers can be as high as 255 (provided the
memory map setup has been setup accordingly).
- By two-digit number, eg "STO 15".
the letter of one of the stack registers mentioned above, eg "STO ENTER
P" where pressing the ENTER key enables alpha-mode.
indirect addressing. Eg "STO -> 13" stores X in the register
by register 13.
- To access local registers use eg "STO .05".
must start with a global alphanumeric label, eg "P1". To enable
alpha-numeric mode for LBL, STO, RCL, XEQ and other commands press the
key after the command.
- The built-in TICKS counter does not seem to return
consistent results. That is, depending on what the calculator is doing
to runs at different speeds. According to the manual only a built-in
quartz will make the timer reliable.
- ALLn shows values without trailing zeros (similar to
FIX, SCI, ENG).
calculator supports integer math for every base 2 ... 16. Bases 2, 8,
10 and 16 are directly accessible from the keyboard. Switch back to
floating point mode per "f H.d" (on the RCL key).
the keyboard green underlined names indicate menus. Use the arrow up
& down keys to navigate thru a menu. Press a letter key to
jump to a menu entry starting with this letter. Press EXIT to exit the
menu without action. Press ENTER to execute the command shown.
- CAT lists all available programs in RAM (labelled
RAM) or flash (labelled LIB).
- BATT shows the battery
voltage, VERS the software version, WHO the names of
the software authors (all commands in the X.FCN menu).
||To my knowledge the WP-34S is the first
calculator every which supports "program local storage".
- The command "LocR" in the P.FCN menu allocates a
number of registers which are accessible only from within the program.
"LocR?" in the TEST menu shows the number of local registers.
- "PopLR" in the P.FCN menu releases the local
- Local registers are accessed using a dot notation, eg
"STO .03". Obviousely, the local registers of nested program
subroutines occupy different registers in global memory space. The
first registers allocated start from 112. Note that with indirect
addressing you can reach these registers as well.
- Note that a "RTN" instruction will also release local
|Function return values
|Another new feature never seen before in a
- A regular RTN will continue operation at the
instruction after the XEQ.
- The newly introduced RTN+1 will continue operation at
the second instruction after the calling XEQ.
- This effectively allows to use the XEQ command similar to a test instruction which skips the next operation when "false".
|Program used to |
004 STO 00
005 LBL 01
028 RCL 00
031 STO 00
033 GTO 01
with count in reg 3:
040 LBL 'B'
041 XEQ 'A'
042 RCL 03
045 STO 03
047 GTO 'B'
|With 100 loops
specified in register 3 the program runs for 13.6 seconds.
The performance index calculates to 34 * 100 / 13.6 = 250
|Flashing the ROM|
latest version of the ZIP file (NC-wp34s_V3-3311.zip as of 3/2013)
contains a subdirectory named "real". "calc_full.bin" is the data to
program into the calculator, see README there.|
I thought, I had bought the special USB-programming cable and updated the software. But I guess this just isn't true.