HP 39gs Master Guide

34
C
C
O
O
P
P
Y
Y
I
I
N
N
G
G
&
&
C
C
R
R
E
E
A
A
T
T
I
I
N
N
G
G
A
A
P
P
L
L
E
E
T
T
S
S
O
O
N
N
T
T
H
H
E
E
C
C
A
A
L
L
C
C
U
U
L
L
A
A
T
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O
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R
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This chapter assumes a reasonable degree of familiarity with the majority of the built-in aplets.
As has been discussed before, the designers of this calculator provided a set of standard aplets for you to
use, changing the capabilities of the calculator as you change aplet. These standard aplets will cover most, if
not all, of your requirements but to a certain extent you can also modify them to suit your needs and copy
them for your friends. No programming is necessarily required at the lowest level and so, unless you want to
learn about the programming language of the hp 39gs & hp 40gs, there is no reason to worry about it unless
you want to produce highly enhanced aplets.
In this chapter we will cover the creation of aplets and, to a lesser extent, programs and notes on the
calculator together with the ability to transfer them to another calculator via cable (hp 40gs) or infra-red (hp
39gs). Generally this will involve making small modifications to the standard aplets and saving them under a
new name. In a chapter which follows we will cover the use of software on a PC to do this.
As well as this you can download additional aplets and programs written by people who do enjoy
programming. These aplets come via the Internet, but you may be able to obtain them from your teacher,
from other users, or from a PC onto which they have been copied. Once aplets have been copied from the
Internet the USB cable provided with your calculator can be used to download the aplets to the calculator.
This will also be covered in a subsequent
chapter on page 245.
We will begin by discussing how to send and receive aplets and programs from one calculator to another
and then proceed on to how to create them. This may sound backwards but my experience has been that
most users arrive at this topic by deciding that they want to know how to send/receive and only afterwards
start asking themselves what to send/receive!
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HP 39gs Specifications

General

Type	Scientific
Form factor	Pocket
Product color	Gray
Internal memory	0.256 MB

Weight and Dimensions

Weight	249 g
Dimensions (WxDxH)	187 x 94 x 31 mm