50g



--- In 50g@yahoogroups.com, "John Dearing" <JSDearing@...> wrote:

>
> 50g TIPS
>
> Please submit yours to share! --John
>
>
> -------------------------------------------------------------------

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* The User Keyboard is your friend. Third-party libraries freely
available from www.hpcalc.org further enhance the custom keyboard's
mode. For example, I have the UTOOL library configured on the long-
hold units key and USIMP (from the lib) on the long-hold convert
key. With USIMP (or similar) on the LH Convert, an unfamiliar SI
unit explosion gets reduced to standard units.

* Similarly, better object viewers are available, as well as slick
editors and full command references available at your fingertips!

* For dynamic verb completion (useful if you program on your
calculator), install emacs 2.11g and store the extable2 library on
an SD card. You will have a complete SysRPL development tool
available that mostly resides on the SD card, thus sparing your
memory.

* To enter complex numbers in a different angle mode while in the
editline (e.g., DEG instead of RAD), begin entry of the complex
number "(RE," and then press the angle key (Alpha-RS 6, rc.p=84.6)
to key in an angle. While here, you can either assign a user key
assignment (with a TakeOver command--see SysRPL programming guides)
to change the angle format immediately; OR, press MODE and change
the angle mode from the dialog box.

* Use compression for large files. The OT49 library includes a BZ
compressor (the BZ compressor is also available elsewhere) and other
useful utilities. The files can be made to automatically
decompress, thereby saving memory.

* Get the free programming environment Debug4x from
www.debug4x.com. It includes a copy of EMU48 that has a functional
HP50g emulator for Windows. Yes, that's right--you can have a 50g
running on your Windows box. No more Windows Scientific
Calculator :)

* Connect your HP50g to your USB port on your computer to save
battery power when doing your homework :)

* Read the extended manual. It has a lot of useful information.

* Use your calculator often and practice, practice, practice.

--Scott

Add these to the wiki site on the links page!

--- In 50g@yahoogroups.com, "John Dearing" <JSDearing@...> wrote:
>
> 50g TIPS
>
> Please submit yours to share! --John
>
>
>
--------------------------------------------------------------------------------
>
>
> ABBREVIATIONS USED: PLUS: The “+” symbol, when shown between two
keys without spaces or commas, means press and hold the first key,
press and release the second key, then release the first key. LS =
Left Shift key. RS = Right Shift key. ◄ ► ▲ ▼ = the cursor
control keys. STO = STO► [the STORE key].
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>
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> TO GET THE “UPDATE CODE” PROMPT TO UPDATE ROM WITHOUT USING
PAPERCLIP: Press ON+F6 [press and hold ON, press and release F6,
release ON]; wait about 3 seconds for a menu of options; press and
release ON, then immediately press and hold both the + and the â€"
keys for 2-3 seconds; release both keys, see “1. UPDATE CODE 2.
SELFTEST”; press 1 to update ROM without having to use a paperclip
in the reset hole. To cancel, press 2 to start the selftest, then
cancel that with ON+F3.
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>
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> "HOLDED" KEY COMBINATIONS: On the 50g, if you press Left Shift [or
Right Shift] and release, then press another key, that key press
combination is different than if you press Left Shift [or Right Shift]
and hold it while you press the next key. The rc.p keycode (row column
. plane) for the held keys is now rc.ph (where h is 1 for held key and
0 for non-held key).
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> EXACT & APPROXIMATE MODE TOGGLE: RS+ENTER.
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> REAL & COMPLEX MODE TOGGLE: LS+TOOL.
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> PUT BACK TICKS ON THE STACK: If you right-shift (hold) the EQW key
('), you will put back ticks on the stack which will use the Algebraic
compiler to parse your command while in RPN mode.
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> TO LIST CONTENTS OF ALL VARIABLES IN SCREEN: Press RS, ▼ [Right
Shift, Cursor Down]. Press ON to cancel.
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> UNIT CONVERSIONS MADE EASY: Unit conversions like yd^3â†'m^3 can be
keystroke-intensive. To make it easy, have flag 117 (Soft MENU)
checked, and RPN mode selected. Example: convert 100 yd^3 to m^3:
press RS, UNITS, VOL, type ‘100’, yd^3 [see “100_yd^3”], LS,
m^3. See “76.4554857984_m3”. You only have to use CONVERT if you
have some units that aren’t on the menus, like ‘qt/hr’. Even
then, you can store that unit in a variable, and make a custom menu
with it (along with the units you regularly use). Then this method
(with LS, the left-shift key) works the same way.
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>
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> FRACTIONAL EXPONENTS: Why do I get a complex number when I evaluate
'(-1)^(2/3)'? Because the machine returns a complex principal solution
for expressions with fractional exponents. To get a real-valued result
to the above, use the x√y key: 'XROOT(3,(-1)^2)' or 'XROOT(3,SQ(-1))'.
>
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> STORE VARIABLES: Example: Store 'π*r2' in variable A1:
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> ALG: 'π*r^2 ► STO A1 ENTER
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> RPN Method 1: π r ENTER 2 yx * A1 STO
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> RPN Method 2a: 'π*r^2 ► A1 STO
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> RPN Method 2b: 'π*r^2 ENTER A1 STO
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> PURGE VARIABLES:
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> ALG: TOOL PURGE VAR [press variable softkey] ENTER
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> RPN Method 1: VAR ' [press variable softkey] ENTER TOOL PURGE
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> RPN Method 2: VAR { [press one or more variable softkeys] ENTER
TOOL PURGE
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