See a short video of RACK42 at: https://youtu.be/5BZ6oYsfi6w
See a short video of version 1 of RACK42 at: https://youtu.be/_lt0Zoqh0og
____________________
PREAMBLE
____________________
The DM42 calculator is a genuine device. A brilliant LCD display, good keys, a
USB disk and a powerful processor - all low powered by a single battery cell.
On the very stable operating system (DMCP) runs Free42 - a perfect simulator of
the legendary HP42 calculator.
As the DM42 is an "open system" it is possible to run other software on top of
the operating system (DMCP). And that is, where RACK42 comes in.
RACK42 is primarily a mobile, small, fast, simple, convenient and powerful
spreadsheet application using RPN as mathematical notation. But RACK42 evolved
to a multifunctional productive system because of useful add on applications
like a convenient calculator mode, a text file editor, an object oriented ASCII
drawing program, an emulator of the legendary HP-35 calculator and finally the
first game (?) on the DM42 (2048 like).
Have fun!
deetee
____________________
MODES
____________________
With MODES (SHIFT+CHS) you can almost any time select one of the following
modes/applictions:
F1 SHEET Standard spreadsheet calculation
F2 CAL Calculator mode (fades out the spreadsheet)
F3 TED Text file editor
F4 DRAW Simple ASCII drawing
F5 HP35 Emulates the legendary HP35 calculator
F6 GAME 2048-like game
Please note that you can also select a mode with XEQ, when you are in the
spreadsheet navigation mode.
The following subchapters explain all different modes, while all other
chapters refer to the standard spreadsheet application:
____________________
_CALCULATOR_________
With MODES and CAL you can enter (or leave) a simple calculator mode
(indicated with a 'CAL' in the status line) that 'fades out' the presentation
of the spreadsheet.
When pressing STO the current value on the stack will be stored an can be
recalled anytime with RCL.
Please note that some functions or features (ie those regarding references)
are disabled.
____________________
_TED________________
With TED you can create or edit text files. The top 4 rows of the keys are used
to simulate a standard keyboard. The keyboard layout can be assigned by the user
by editing the file "/RACK42/kbd.txt".
To change for instance the default keyboard (QWERTY) to a german keyboard
(QWERTZ) you can (after saving the default keyboard with SHIFT+F6 to the USB
disk) edit /RACK/kbd.txt with your PC text file editor and change y and z (and
of course Y and Z).
TED keys:
SHIFT F1 QUIT TED without saving
SHIFT F2 NEW file
SHIFT F5 HTML view of (markdown) text
SHIFT F6 KBD^ save current keyboard to file /RACK/kbd.txt
/ * - + Text buffer (mark1, mark2, delete, paste)
UP Save text to "/RACK42/tmp.txt"
DOWN Load text file from USB disk
Please note that when you are leaving TED (with MODES) the current text will be
saved to "/RACK42/tmp.txt".
Please note that TED uses the same procedure as the spreadsheet application to
save a textfile with a specific file name - "SAVE AS" (enter the file name in
a selected cell of the spreadsheet application and press UP after returning to
TED). Files opened (loaded) with a specific file name are still saved under
this name (when pressing UP or automatically when leaving TED).
Keyboard (top 4 rows of keys):
FLIP q w e r t
ALT a s d f g
SHIFT z x c v b
ENTER SPC SPC SPC BSP
Default keyboard:
___________ALT___________
___SHIFT___ ___SHIFT___
FLIP FLIP FLIP FLIP
qwert yuiop QWERT YUIOP 12345 67890 !@#$% ^&*()
asdfg hjkl- ASDFG HJKL- *+-/= ,456. '"`/\ <=>[]
zxcvb nm,./ ZXCVB NM,./ \$%() -123+ .,:;~ ?|_{}
HTML view:
With SHIFT F5 TED offers a html view of the edited file using the internal
web browser of the DM42 (help file viewer). TED uses some markdown signs to
produce a html file and saves it to RACK42/ted.htm.
Please note that so far TED supports 3 headers (lines starting with #, ##
and ###) and simple not nested unordered lists (lines starting with * or -).
____________________
_DRAW_______________
With DRAW you can draw simple ASCII objects (line, rectangle, horizontal and
vertical text as well as a function plot from the spreadsheet application)
on a sheet with 7x28 characters. The objects can be treated with
cut/copy/paste later on. The final picture can be saved (PRINT) to a simple
text file (print.txt) for later use (ie with a text editor like TED).
Possible keys are:
1~9 Cursorpad (see below, 5 centers cursor)
F1 Draw line object
F2 Draw rectangle object
F3 Draw horizontal text object
F4 Draw vertical text object
F5 Draw last function plot from spreadsheet
F6 Save picture to a file (print.txt)
UP Save DRAW file (new.d) to USB disk (see SAVE AS option below)
DOWN Load DRAW file (*.d) from USB disk
BSP Delete (at "hot spot") marked object
/ * Copy draw object to clipboard (grab "hot spot" of object)
- Delete clipboard
+ Paste clipboard to current cursor position
____________________
_HP-35______________
In the HP35 mode you can use an emulation of the legendary HP35 calculator.
Please note that HP35 doesn't use shifted keys. To EXIT HP35 (and return to
the standard spreadsheet calculation) simply press F1 (QUIT).
Original HP35 display and keyboard layout:
_________________________
| |
| -1.234567890-12 |
|_________________________|
| |
| X^Y log ln e^X CLR |
| SQRT arc sin cos tan |
| 1/X X><Y ROT STO RCL |
| E-N-T-E-R CHS EEX CLX |
| - 7 8 9 |
| + 4 5 6 |
| * 1 2 3 |
| / 0 . PI |
|_________________________|
____________________
_GAME_______________
In this 2048-like game you have to shift and merge equal numbers in a 4x4 grid.
Possible keys are:
F1 Quit
F2 New game
F3 4 1 Collapse left
F4 2 Collapse down
F5 8 5 Collapse up
F6 6 3 Collapse right
____________________
SCREEN
____________________
The top line of the screen (status line) shows the selected cell address, the
value of this cell (if demanded with SHOW) or the date, some indicators (ie
shift) and the battery status (0...9).
The second line (edit line) shows the content (formula or text) of the selected
cell.
The third part of the screen swows the spreadsheet (with a cell width of 9), or
two top registers of the stack or (when editing a text) all available ascii
characters.
At the bottom of the screen the function keys are shown.
Please note that in case of printing a chart (see chapter Graphics) the whole
screen is used by the chart.
Indicators:
9 Battery status (0~9)
^ (arrow up) Shift
-> (cursor right) CursorPad is active
1 (Formula) Edit mode - NumPad is active
SQRT (Formula) Edit mode - Extra math menu is active
@ (Formula) Edit mode - Reference selection
" (Text) Edit mode
x HEXmode1 (status line shows cell value in hex format)
X HEXmode2 (only status line shows cell value decimal)
____________________
PRIOR KEYS
___________________
SETUP Quit RACK42 to operating system (DMCP)
EXIT On/Off (Suspend)
SHIFT Toggle shift key
MODES Modes menu (Spreadsheet, Calculator, Ted, Draw, HP-35)
ASSIGN Screenshot
SHOW Shows date/time or specific information in the status line
DISP Toggle grid display
BASE HEX mode (no HEXmode, HEXmode1 or HEXmode2)
SST View help image (/RACK42/RACK42help.bmp)
BST View html help file (/RACK42/RACK42help.htm)
____________________
NAVIGATION MODE
____________________
When starting RACK42 you are in the navigation mode. The number keys work as
cursor pad (see below). You can select and edit a specific cell, recalculate the
entire spreadsheet, save or load specific files or copy and paste a cell.
The navigation mode is also active when you refer in a formula to a specific
cell (see edit mode).
Navigation Numpad/Cursorpad:
7 Home 8 Up 9 PgUp
4 Left 5 Enter 6 Right
1 End 2 Down 3 PgDn
Keys in navigation mode:
1~9 Navigation - cursor pad
ALPHA STO Define and edit a new text cell
EDIT/F1 ENTER 5 Edit selected cell
CALC/F2 XEQ (Re-)Calculate spreadsheet
SAVE/F3 ^ Save recent spreadsheet to file new.s (dir RACK42 exists) *)
LOAD/F4 v Load spreadsheet from USB disk (dir RACK42 exists)
COPY/F5 Copy selected cell to clipboard
PASTE/F6 Paste cell from clipboard
BACKSPACE Delete cell content
CLEAR Clears complete sheet
DISP Show grid
XEQ Enter mode menu
PRINT Print graphic (see chapter GRAPHICS)
PGM.FCN Function plot (see chapter CALCULUS)
ASSIGN Make a screenshot
*) Please note that if the selected cell is a text cell, RACK42 saves the file
under the filemname of this cell's text ("SAVE AS").
**) BASE/HEXmode:
noHEXmode HEXmode1 HEXmode2
Indicator none x X
Input/CellValue decimal decimal hex
Status value decimal hex decimal
____________________
EDIT MODE (FORMULA)
____________________
When in (formula) edition mode you can type a formula in RPN mode. The formula
will be evaluated instantly and the value is shown in the cell (or with big
letters as stack if with CUSTOM demanded) or (if with DISP
demanded) in the status line with better precision ("Calculator Mode").
Edit keys:
ENTER/F1 5 Enter formula and exit edit mode (to navigation mode)
Sep/F2 R/S Separate numbers
REF/F3 RCL Insert reference cell (select: ENTER/F1, escape: ESC/F3)
CLR/F4 Clear complete formula
<-/F5 Edit cursor left
->/F6 Edit cursor right
1...9. Insert number
Shift+F1~F6 Insert hex digit A~F
+ - * / Basic operation
BACKSPACE Delete command
X<>Y Swap stack register
LASTx Duplicate TOS (DUP)
CLEAR Delete TOS (DROP)
+/- Negate TOS (NEG)
E Push 10^TOS to the stack
Rv Rotate (3 top stack register)
MATH 1/X SQRT LOG LN POW SQR 10^X e^X
TRIG SIN COS TAN ASIN ACOS ATAN
SUM+ Sum of range
SUM- Count of range
SLOPE SLOPE (fncell, xcell, xvalue)
SOLVER SOLVE (fncell, xcell, xstartvalue)
INTEGRAL INTEGRAL(fncell, xcell, fromvalue, tovalue)
DEQ DIFFERENTIAL EQUATION (fncell, xcell, ycell, tovalue)
MATRIX Matrix function menu
FLAGS Physical constants
CUSTOM Show cell value in grid or as stack (big numbers)
CATALOG XEQ Extended math menu (see below)
PROB Probability math menu
COND Conditions menu (no nesting)
STAT STAT Statistics menu
CONV CONVERT Conversions menu
MISC Miscellaneous menu
____________________
EXTENDED MATH MENU
____________________
When in edit mode XEQ or CATALOG (Shift +) offers an expanded math menu to
insert ie hyperbolic functions.
Please note that some functions deliver more than one result. Try to extract
the appropriate result with SWAP, CLEAR/DROP. For instance "41 C|F" yields
5 (C, Y) and 105.8 (F, X). If you wanted to convert 41F to 5C add CLEAR/DROP
(Shift+BACKSPACE) or if you wanted to convert 41C to 105.8F add SWAP and
CLEAR/DROP to calculate on.
HYP Hyperbolic functions (SINH, COSH, TANH, ASINH, ACOSH, ATANH)
PROB Probability functions (nP|Cr, LN!, P|CDF, NAND, INT)
COND Conditions (<, =, >, IF, ELSE, THEN))
STAT Statistics (COUNT, SUM, AVG|STDDEV, MIN|MAX, LRa|b)
CONV Conversions (P|R, HMS|H, kg|lb, °C|°F, cm|in, l|gal))
MISC Miscellaneous (MAT, VAL, DEQ, SLOPE, SOLVE, INTEGRAL)
Please note that VAL copies the recent value of the cell as plain value to
this cell. The recent formula of this cell will be deleted.
____________________
EDIT MODE (TEXT)
____________________
When defining (ALPHA or STO) or editing (EDIT, ENTER/F1) a text cell all
possible characters will be shown an can be selected using the navigtion pad.
Please note that the number of characters per cell is limited to 9.
ENTER/F1 STO Enter text and exit text mode (to navigation mode)
INS/F2 5 Insert selected character to text
CLR/F4 Clear complete text
<-/F5 Edit cursor left
->/F6 Edit cursor right
BSPC Delete character
NAVIGATE Use navigation pad to select character
____________________
CALCULUS
____________________
The PLOT, SLOPE, SOLVER and INTEGRAL functions evaluate a cell containing a
function (fncell) which depends itself of a referenced cell (xcell).
Additionally PLOT and INTEGRAL demand two range x-values (values only no
references).
To see the function plot navigate to the cell containing the PLOT command
(don't edit) and press PGM.FCN.
SOLVER tries to find the root of the fncell variating the xcell using Newton's
secant method. As start value SOLVER uses the value of xcell.
INTEGRAL uses the Simpson's formula and divides the range into 10 stripes.
Please note that DEQ solves a differential equation y'=f(x,y) with given
start value y(x0) due to Runge-Kutta with 4th order (RK4). As arguments DEQ
needs fncell, xcell, ycell and a x-value for the calculated y-value of the
function that solves the differential equation.
____________________
MATRIX
____________________
In edit mode you can enter matrix functions using MATRIX or the math menu (XEQ).
A reference to a matrix references to the first matrix cell (1|1).
Please note that RACK42 deals with 3x3 matrices only - smaller matrices can be a
subset.
Matrix functions that create a new matrix write 3x3 (hard coded) values to the
spreadsheet at the target cell (to) if there is sufficient room on the
spreadsheet. Please be careful using these commands without a target cell to not
overwrite existing contents of the spreadsheet.
DET Determinant (from)
TRANS Transpose (from, to)
INV Inverse (from, to)
MULT Multiply (from1, from2, to)
SUB Substract (from1, from2, to)
ADD Add (from1, from2, to)
____________________
BAR GRAPHIC
____________________
RACK42 can display a simple bar graphic. Enter the desired text (optional) and
the related data in two colums. Define in another cell the range of the data
column (references to first and last data cell). Navigate to this "reference
cell" and press PRINT to view a simple bar chart. As the bars are scaled the
maximum value will be printed in the first line. Please note that bars with
negative values are not printed.
Please note that RACK42 supports function plots (see chapter CALCULUS).
____________________
SPECIFICATIONS
____________________
Spreadsheet, Calculator:
6 15 Number of columns and rows
3 5 Number of columns and rows to be displayed
8 Size of calculation stack
5 Size of stack for reference addresses
40 Number of commands per cell
9 Cell width; max. number of letters of text cell
30 50 Pixel size of function plot
100 Maximal number of iterations (solver)
1E-8 Differential step (slope, solver)
100 Number of stripes (integration, differential equation)
TED:
8192 Maximal size of text files
7 Number of displayed text lines
DRAW:
7 28 Size of character drawing board
30 Maximal number of drawing objects
25 Maximal length of text objects
____________________
PHYSICAL CONSTANTS
____________________
To enter a physical constant (2018 CODATA) press FLAGS in edit mode and the
the appropriate F-key.
c 299792458 Speed of light
g 9.80665 Acceleration of gravity
G 6.67430e-11 Newton constant of gravity
Vm 0.02271095464 Molar volume of ideal gas
NA 6.02214076e23 Avogadro constant
Rinf 10973731.568160 Rydberg constant
h 6.62607015e-34 Planck constant
Phi0 2.067833848e-15 Magnetic flux quantum
a0 5.29177210903e-11 Bohr radius
k 1.380649e-23 Boltzmann constant
R 8.314462618 Molar gas constant
F 96485.33212 Faraday constant
t 273.15 Celsius temperature
atm 101325 Standard atmosphere
e 1.602176634e-19 Elementary charge
eps0 8.8541878128e-12 Vacuum electric permittivity
mu0 1.25663706212e-6 Vacuum magnetic permeability
Z0 376.730313668 Impedance of vacuum
mU 1.6605390666e-27 Atomic mass constant
re 2.8179403262e-15 Electron radius
me 9.1093837015e-31 Electron mass
mp 1.67262192369e-27 Proton mass
mn 1.67492749804e-27 Neutron mass
mmu 1.883531627e-28 Muon mass
muB 9.2740100783e-24 Bohr magneton
muN 5.0507837461e-27 Nuclear magneton
mue -9.2847647043e-24 Electron magnetic moment
mup 1.41060679736e-26 Proton magnetic moment
mun -9.6623651e-27 Neutron magnetic moment
mumu -4.4904483e-26 Muon magnetic moment
alph 7.2973525693e-3 Fine structure constant
sigm 5.670374419e-8 Stefan-Boltzmann constant
G0 7.748091729 Conductance quantum
gamp 2.6752218744e8 Proton gyromagnetic ratio
C1 3.741771852e-16 First radiation constant
C2 1.438776877e-2 Second radiation constant
____________________
ASCII TABLE
____________________
DEC | 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
HEX | 0 1 2 3 4 5 6 7 8 9 a b c d e f
------------------------------------------
032 20 | ! " # $ % & ' ( ) * + , - . /
048 30 | 0 1 2 3 4 5 6 7 8 9 : ; < = > ?
064 40 | @ A B C D E F G H I J K L M N O
080 50 | P Q R S T U V W X Y Z [ \ ] ^ _
096 60 | ` a b c d e f g h i j k l m n o
112 70 | p q r s t u v w x y z { | } ~
128 80 | D M S I G S T P Q L L G N E D R
| I U Q N R I A I M E F E E N O I
| V L R T E G B T W G
| T T Y M E N H
| 1 A R T
144 90 | L M P G A N A A E A 3 E O U G S
| E U O R O T U N E D S U U R Q
| F U A I M G O C M M E A
| T N D L L L T L L Y R
| D D E S 2 E
160 A0 | T T
| R R
| I I
| D U