HP 48G - Page 11

the current directory is “visible” (usable) from the
currentdirectory; allothernames are “invisible.” Thus,
inthe example, all names in K1 are also visible from
DIEA, DIRE and HOEE, but notfrom OIR2, DIR3, MIAC,
orHOME. And, as with the built-in (command) names,
all names in HOME are visible from all directories.
To erase an empty directory, you can use the key-
board command (&[PURG) ( just as for other named ob-
jects). But to avoid grievous errors, for a non-empty
directory, you need the non-keyboard FGOIFE com-
mand. Thus, to erase the example structure, first go
HOME (o)HOME) then put{ DIR1 DIRZ DIR3 Xon
the stack and use PGOIE. (You could use (&)PurG)on
'0IRE" alone, but it's easier to do it all at once.)
(©]MEMORY
The application offers a self-contained in-
put screen that allows you to move, copy, edit, create
or purge any named object in memory. As with most
such application screens, you use the arrow keys ((a),
(v), («Jand (»)) to move the highlight bar around, then
(EnTeR) or LT to accept your selections. You can
select more than one object by using the tool.
(70)
MEM [EYTESINEWDO] | DIE [ARITH
PATH CEDIR [PGDIR VARS |TVARS|ORDER]
I NA N eT
(72)
[sINY [SMEG[sCON] [ [HMEM]
The menu has 2 commands for measur-
ing memory storage and data accuracy: [MEM mea-
sures the free memory (in bytes) left in your machine;
EYTES measures the size (in bytes) and accuracy (a
binary-integer checksum) of a given object.
(71)
This menu also has two main sub-groups: I is
a collection of directory commands. Along withPHTH,
CRDIR andFGOIR, you get commands that are useful
for working with the VAR menu display (JROER re-
orders that menu; YARS and TWARS put the menu—or
a subset—onto the stack as a list of names). Com-
mands in the other sub-group, EIAEL], allow you to
perform arithmetic directly with on object stored in a
name—no need to return the object to the stack first.
(MEMORY), Directories and Paths 9