HP HP-28S - Page 190

If you're attempting to edit an existing object, using EDIT or VISIT,
and a copy of the unsuccessful command line is saved in the com-
mand stack, purge the original copy of the object, press .1 COMMAND I
to recover the command line containing the edited object, and press
1 ENTER I to enter the edited version.
Low Memory!
If fewer than 128 bytes of free memory remain,
Lo •...• ~leroot- '"II flashes once in the top line of the display. This mes-
sage will flash
at every keystroke until additional memory is available.
Clear unneeded objects from memory before continuing your
calculations.
No Room
To Show Stack. It is sometimes possible for the HP-28S
to complete all pending operations, and not have enough free mem-
ory left for the normal stack display. In this case, the calculator
displays
t·lc, F.:oom t c, ::;;hO'A' Stack in the top line of the display.
Those lines of the display that would normally display stack objects,
now show those objects only by type, for example, Re.:! 1 Numbet-,
Algebr.:!ic, and so on.
The amount of memory required to display a stack object varies with
the object type-algebraics usually require the most memory. Clear
one or more objects from memory, or store a stack object as a variable
so
that it does not have to be displayed.
Out of Memory. In
the extreme case of low memory, there is insuffi-
cient
memory for the calculator to do anything-display the stack,
show menu labels, build a command line, and so on. In this situation,
you
must clear some memory before continuing. A special
Otl t 0 f t'lemc,r '"I procedure is activated, which will create a display:
Out of Memory
Purge?
Command Stack
EDlEDI ___ _
20: Memory 189
I