Maximizing Performance - HP -28S Manual

The calculator will sequentially prompt you to clear:
1. The COMMAND stack (if enabled).
2. The UNDO stack (if enabled).
3. LAST Arguments (if enabled).
4. The custom menu (if any).
5. The stack.
6. Each variable in the HOME directory.
For each item that you want to purge, press the
YES
menu key; for
those that you want to keep, press
NO
After pressing
YES
at least once, you can try to terminate the
I] II t
0
f
Me
I' I ' t 0
r
':;I
procedure by pressing 1
ON
I. If sufficient memory is
available, the calculator returns to the normal display; otherwise, the
calculator beeps and continues through the purge sequence. After cy-
cling once through the choices, the
I]
l"l
t
0
f t' 1
e
I' I ' t 0
t-
Y
procedure
attempts to return to normal operation. If there still is not enough free
memory, the procedure starts over with the sequence of choices to
purge.
If you press
YES
for an empty directory, it is purged. If you press
YES
for a directory that contains variables, the variables in that di-
rectory are displayed.
Maximizing Performance
From time to time the calculator does HhousekeepingH to make better
use of memory. Generally this process is noticeable only as short
pauses during plotting, for example; however, when memory is al-
most full and the stack contains hundreds of objects, the calculator
may respond slowly to even simple operations such as selecting a
menu.
This section contains tips for maximizing speed (by reducing the
amount of housekeeping required) and maximizing available memory
(by increasing the effectiveness of housekeeping).
190 20: Memory
I