HP HP-28S - Exceptions; Manual Selection of Entry Modes

If the cursor is positioned at the end of the command line, or if Insert
mode is active, spaces are included as needed to keep successive com-
mands separate.
Exceptions
To enable you to select a mode while using the command line in Im-
mediate or Algebraic entry mode, the following command keys
execute
their command without disturbing the command line.
• STO , OEG ,and RAD in the MODE menu.
• DEC , HEX , OCT ,and BIN in the BINARY menu.
Since the following commands make sense only in a program, press-
ing one of these keys always writes the command's name in the
command line.
• HALT in the PROGRAM CONTROL menu.
• All keys in the PROGRAM BRANCH menu.
To help prevent the accidental loss of variables, pressing CLUSR (in
the MEMORY menu) always writes CLUSR in the command line. You
must then press I ENTER I to execute the command.
Manual Selection of Entry Modes
The calculator automatically switches between Immediate and Alge-
braic
entry modes each time you press ~ to begin or end a name or
algebraic.
It also switches to Alpha entry mode when you press .~
or 8]. You can manually select the entry mode by pressing the ~
key. Doing so switches the entry mode in the cycle illustrated below.
I Immediate I
------ I Alpha
----....,.~ I Algebraic
1
j
..
Manual Selection of Entry Modes
18: The Command Line 171