Try to learn something about everything, and everything about somethingThomas Huxley “Darwin's bulldog” (1824-1895)

Trace: • Dokuwiki Mirror • LF15C - firmware for the DM15 • DokuWiki Unison Backup • Benchmarking

You are here: Home » Public Area » Calculators » 3rd Party Firmware » Desk15 - firmware for the DM15

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision		Previous revision
public:calculator:3rd:desk15 [17/02/26 17:57 GMT] – [Desk15 - firmware for the DM15] johnpublic:calculator:3rd:desk15 [19/04/26 21:14 BST] (current) – [Further Information] john
Line 20: Line 20:
  
  
-===== Further Information =====+==== README ====
  
 +++++ The developer's README (click to read) |
  
-{{tag>calculator dm15l desk15}}+<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> 
 + 
 +++++ 
 + 
 + 
 +===== Further Information =====
  
  
Line 30: Line 317:
 Page updated : ~~LASTMOD~~ Page updated : ~~LASTMOD~~
  
 +{{tag>calculator dm15l desk15}}

Navigation