HP 49g Graphing Calculator - Manual (Page 154)

Editing a variable
1. Use File Manager
(Q(EI1D)
to select the directory that contains the
variable you want to edit. (See “Selecting a directory or variable” on
page 7-7.) A list of all the objects in that directoiy is displayed.
2. Highlight the name of the variable or directory you want to edit.
3.
Press
{NXT) (NXI)
EDITB.
The contents of the variable are now available.
The
EDITB
command enables you to edit the contents using an editor
that is appropriate to the type of object stored in the variable. For
example, if the variable is storing a matrix,
EDITB
displays the matrix in
Matrix Writer. If it is storing an equation, it displays the equation in
Equation Writer, and so on).
4. Change the contents of the variable.
5. Press '
Edit a variable when you want to change its contents.
6. Press (CANCB) to return to the default display.
Memory Management
Tire HP 49G has 512 ICb of RAM and 2 Mb of Flash ROM.
RAM is segmented into system memory, user memory, port 0 and port 1.
System memory stores system variables. You do not have access to
system memory.
User memory contains the HOME directory (and its subdirectories),
history, working memory (that is, memory available for use by
calculations and executing programs) and a number of temporary
variables created eitlrer by the system or by executing programs.
Port 0 is available for storing libraries and for backed-up objects, and port
1 can be used to store objects.
Flash ROM is segmented into system memoiy—which is an extension of
RAM system memory—and port 2. Like port 1, port 2 can be used to store
objects you create or download.
Objects stored in port memoiy can be called or executed, but they caimot
be viewed or edited imless copied to main memory.
In total, the HP 49G offers over 1 Mb of port memory.
Page 7-10 Storing objects