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public:calculator:3rd:desk15 [17/02/26 17:56 GMT] – johnpublic:calculator:3rd:desk15 [17/02/26 20:45 GMT] (current) – [README] john
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 FIXME FIXME
 +
 +
 +  * From HP Forum [[https://www.hpmuseum.org/forum/thread-23488.html]]
 +  * You Tube [[https://youtu.be/ktrKZzN3wJw]]
 +  * Github for firmware and brief README guide [[https://github.com/zooxo/desk15]]
 +
 +
 +==== Firmware Files ====
  
  
 ^Date^Firmware^Comment^ ^Date^Firmware^Comment^
 |17/02/26|{{ :public:calculator:info:desk15-001.hex |}} | Version 01 | |17/02/26|{{ :public:calculator:info:desk15-001.hex |}} | Version 01 |
 +
 +
 +==== README ====
 +
 +++++ The developer's README (click to read) |
 +
 +<code>
 +
 +This software is protected by the BSD 3 Clause Licence
 +and copyright (c) 2025 by deetee. All rights reserved.
 +
 +
 +DESK15 - Calculator suite (including a Spreadsheet) for the DM-15
 +
 +____________________
 +
 +PREAMBLE
 +____________________
 +
 +The HP-15c was probably the most simple but versatile scientific calculator.
 +Similar to DESK42 (for the DM42) DESK15 offers an alternative firmware for the
 +DM15/DM15L replica of Swissmicros with a suite of some applications like a
 +complex number calculator, a spreadsheet, a symbolic, a tabletop calculator
 +and even a sliderule and a simple text editor.
 +
 +Have fun!
 +deetee
 +
 +
 +____________________
 +
 +INSTALLATION
 +____________________
 +
 +To install a new firmware to a DM-15 (Voyager) calculator have a look at
 +chapter Firmware Update of the Swissmicros Voyager Series User Manual at:
 +  https://technical.swissmicros.com/voyager/firmware/
 +
 +On linux computers for example install the package lpc21isp and flash the
 +desired firmware (hex file) to the calculator with:
 +  sudo lpc21isp <firmware.hex> /dev/ttyUSB0 115200 12000
 +
 +After starting this command press the reset button on the backside of the
 +calculator with a paperclip. After the flashing procedure ends you might need to
 +reset the calculator again. Every Swissmicros-Calculator has a reset button
 +on the PCB (even if there is no hole to reach it).
 +
 +
 +____________________
 +
 +DESK
 +____________________
 +
 +When you start DESK15 the first time you see the application launcher DESK. You
 +can launch the desired application with the keys 7, 8, 9 and 4, 5, 6:
 +
 +  7 PLEX ... Complex Number Calculator
 +  8 FLEX ... Symbolic Calculator
 +  9 RAX  ... Spreadsheet
 +  4 TTOP ... Table Top Calculator
 +  5 RULE ... Slide Rule Simulation
 +  6 TEX  ... Text Editor
 +
 +On the right side of the screen you see some extra information like the battery
 +level, date (day) and time (24 hour format).
 +
 +Please note that the battery level is a momentarily value that varies due to the
 +momentarily activity of the calculator. But if you see the empty battery symbol
 +quite often you might consider changing the battery.
 +
 +____________________
 +
 +PLEX
 +____________________
 +
 +PLEX is a scientific calculator generically designed to work with complex
 +numbers. Many routines of PLEX are used by other applications (even if they work
 +with real numbers only). Beside advanced mathematic functions it even offers an
 +extensive function analysis (function value, slope, solve, integrate and plot).
 +
 +PLEX supports the following functions:
 +  Basic
 +    0-9.      Number input
 +    ENTER     Enter number (stack lift) or duplicate TOS
 +    + - * /   Basic operation
 +    CHS       Negate TOS (ends number input)
 +    EEX       Push Y*10^X to the stack
 +    BSP gBSP  Clear number entry or TOS, clear stack and statistics data
 +    LASTx     Push last ENTERed number to stack
 +    SWAP      Swap X and Y
 +    ROT up/dn Rotate 3 stack elements
 +    STO RCL   Store TOS or push stored number to stack (store 0 to delete)
 +  Complex number operations
 +    fTAN      Convert X and Y (real values) to complex number (and vice versa)
 +    f1 g1     Display number in rectangular or polar view
 +    f-        Swap real and imaginary part of complex number
 +    fCHS      Conjugate complex number
 +  Advanced mathematics
 +    SQRT, SQR, EXP, LN, 10^X, LOG, Y^X, %, 1/X, delta%,
 +    FRAC, INT, ABS, PI, Pxy, Cxy, lnGAMMA (f0),
 +    SIN, COS, TAN, aSIN, aCOS, aTAN, SINH, COSH, TANH, aSINH, aCOSH, aTANH
 +    fENTER    NAND ~(X & Y) ... useful in HEX mode
 +    g-        Calculate 2 roots of quadratic equation xx+px+q=0 (enter p q)
 +    fCOS      PV (present value) of interest rate (%) and duration (periods)
 +  Statistics
 +    SUM+ SUM- Add/remove number to/from statistics registers
 +    g0 g.     Mean value and standard deviation
 +    fSUM      Parameters a and b of linear regression (y=a*x+b)
 +    gBSP      Clears statistics registers (and stack)
 +  Function analysis
 +    gR/S      Start key recorder to input f(x) (gR/S R/S to delete)
 +    R/S       Stop key recorder, calculate y=f(x)
 +    fg/ fg*   Solve, slope, integrate, plot
 +    GSB 8/9   SAVE/LOAD a recorded function to/from one of 6 slots
 +  Conversions
 +    fg7 8 9   cm<>in, km<>mi, km<>nmi
 +    fg4 5 6   kg<>lbs, °C<>°F, l<>gal
 +    fg1 2 3   rect/polar view, h<>h.ms, deg<>rad
 +  Menu
 +    GSB       QUIT, SAVE/LOAD, Physical Constant, Size of font, HEX mode
 +    fGSB      BATTERY, set LCD brightness/voltage, set OFFTIME
 +    gGSB      Get/set DATE, get/set TIME
 +
 +    Please note:
 +    When in HEX mode enter numbers >9 with a dot (ie .1=a, .6=f).
 +    To set the OFFTIME (default is 60s) enter the desired value (5-300) in
 +    seconds to the stack and press Toff (fGSB6).
 +    Be careful when setting the lcd brightness (fGSB4, 0-64) or lcd voltage
 +    (fGSB5, 0-5-7). The default values are 0 and 5.
 +    Get/set date and time from/to the real time clock (RTC) with the gGSB menu.
 +    The format for the date on the stack is YY.MMDDw (where w is the number of
 +    the weekday (0=Monday). The format for the time is HH.MM.
 +
 +  Physical constants keys (GSB4):
 +    ENTER     Select (push) constant
 +    2 8 3 9   Down, Up, PgDown, PgUp
 +    GSB       Quit (without selecting)
 +
 +  Physical constants;
 +    0  c    299792458         Speed of light
 +    1  g    9.80665           Acceleration of gravity
 +    2  G    6.67430e-11       Newton constant of gravity
 +    3  Vm   0.02271095464     Molar volume of ideal gas
 +    4  NA   6.02214076e23     Avogadro constant
 +    5  Rinf 10973731.568160   Rydberg constant
 +    6  h    6.62607015e-34    Planck constant
 +    7  Phi0 2.067833848e-15   Magnetic flux quantum
 +    8  a0   5.29177210903e-11 Bohr radius
 +    9  k    1.380649e-23      Boltzmann constant
 +    10 R    8.314462618       Molar gas constant
 +    11 F    96485.33212       Faraday constant
 +    12 t    273.15            Celsius temperature
 +    13 atm  101325            Standard atmosphere
 +    14 e    1.602176634e-19   Elementary charge
 +    15 eps0 8.8541878128e-12  Vacuum electric permittivity
 +    16 mu0  1.25663706212e-6  Vacuum magnetic permeability
 +    17 Z0   376.730313668     Impedance of vacuum
 +    18 mU   1.6605390666e-27  Atomic mass constant
 +    19 re   2.8179403262e-15  Electron radius
 +    20 me   9.1093837015e-31  Electron mass
 +    21 mp   1.67262192369e-27 Proton mass
 +    22 mn   1.67492749804e-27 Neutron mass
 +    23 mmu  1.883531627e-28   Muon mass
 +    24 muB  9.2740100783e-24  Bohr magneton
 +    25 muN  5.0507837461e-27  Nuclear magneton
 +    26 mue  -9.2847647043e-24 Electron magnetic moment
 +    27 mup  1.41060679736e-26 Proton magnetic moment
 +    28 mun  -9.6623651e-27    Neutron magnetic moment
 +    29 mumu -4.4904483e-26    Muon magnetic moment
 +    30 alph 7.2973525693e-3   Fine structure constant
 +    31 sigm 5.670374419e-8    Stefan-Boltzmann constant
 +    32 G0   7.748091729       Conductance quantum
 +    33 gamp 2.6752218744e8    Proton gyromagnetic ratio
 +    34 C1   3.741771852e-16   First radiation constant
 +    35 C2   1.438776877e-2    Second radiation constant
 +
 +
 +____________________
 +
 +RAX
 +____________________
 +
 +RAX is the spreadsheet application of DESK15. When starting RAX you are in the
 +navigation mode, where the number keys work as cursor pad (see below). The
 +navigation mode is also active when you refer in a formula to a specific cell.
 +
 +Keys in navigation mode:
 +  2 4 6 8  Navigation (Down/Left/Right/Up)
 +  ENTER 5  Edit selected cell, edit new formula cell
 +  R/S      Define and edit a new text cell
 +  BSP      Delete cell
 +  STO RCL  Save/load spreadsheet to/from one of 6 slots
 +           Please note that a text in the last cell (D8) is used as slot name.
 +  GSB      Menu: Quit RAX, New sheet, Copy&Glue/Paste, Hex mode (see PLEX)
 +
 +Keys in edit mode (ENTER to select and quit):
 +  SST GTO        Cursor left/right
 +  SUM+           Insert a stack enter command to separate numbers
 +  BSP            Backspace - delete character
 +  RCL            Reference (Select reference cell and enter)
 +  ENTER GSB R/S  Quit edit mode to navigation mode
 +
 +Keys in text edit mode (R/S):
 +  2 4 6 8    Navigation (Down/Left/Right/Up)
 +  7 1 5      Pos1, End, Center
 +  SST GTO    Cursor left/right
 +  BSP        Delete character (left of cursor)
 +  R/S ENTER  Exit text editing mode
 +  Any other key inserts the selected character.
 +
 +
 +____________________
 +
 +FLEX
 +____________________
 +
 +The symbolic calculator FLEX has the look and feel of PLEX, but actually
 +calculates in the first cell of a RAX spreadsheet. Hence you can see and edit
 +(with R/S) the formula that yields to the result.
 +
 +Quit FLEX (and go back to the DESK menu) with GSB.
 +
 +____________________
 +
 +TTOP
 +____________________
 +
 +TTOP is a tabletop calculator that enables (simple) calculations with big
 +numbers (even in HEX format) with up to 17 digits. If desired two digits are
 +used for decimals (ie for cent amounts). PLease note that entering decimals
 +(after pressing ".") always "shifts the pressed number key in".
 +
 +TTOP supports the following functions:
 +  + - * / Basic operation
 +  CHS     Negate TOS (ends number input)
 +  EEX     Push Y*10^X to the stack (Y*16^X in HEX mode)
 +  ENTER   Enter number (stack lift) or duplicate TOS
 +  SWAP    Swap X and Y
 +  ROT     Rotate 3 stack elements
 +  BSP     Clear last number
 +  SQRT    Calculate square root
 +  SUM+    NAND ~(X & Y) ... useful in HEX mode
 +  STO RCL Store TOS or push stored number to stack (store 0 to delete)
 +  GSB     Menu: Quit TTOP, 0/2 decimals, HEX mode
 +
 +
 +____________________
 +
 +RULE
 +____________________
 +
 +RULE is a simulation of a historic slide rule for reasons of education and
 +reminiscence.
 +
 +RULE supports the following functions:
 +  SQRT /   Slide one pixel left/right
 +  EXP 9    Slide 5 pixel left/right
 +  POW10 8  Slide 10 pixel left/right
 +  POW 7    Slide 20 pixel left/right
 +  GSB      Quit RULE
 +
 +
 +____________________
 +
 +TEX
 +____________________
 +
 +TEX is a (very) simple line oriented text editor. But as entering a text with
 +cursor keys is quite a pain TEX is sufficient to manage a ToDo or shopping list
 +or some important formulae. Please note that TEX can manage a maximum of 255
 +characters (with not more than 18 characters per line).
 +
 +TTOP supports the following functions:
 +  4 8 3 9  Navigation (Down/Up/PdDown/PgUp)
 +  ENTER    Edit (top) line
 +  /        Edit line but split line at cursor position after editing
 +  *        Join two lines
 +  - BSP    Delete (top) line
 +  +        Insert line before top line
 +  STO RCL  Save/load TEX document to/from one of 6 slots
 +  GSB      Quit TEX
 +
 +  To enter a new line after the last line edit with split option (/) and
 +  leave editor immediately (ENTER).
 +  To edit a text TEX uses the text editing routines of RAX (see above).
 +
 +
 +</code>
 +
 +++++
  
  

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