HP 95LX - Page 41

The Calculator’s Registers
The basic calculator uses four sets of registers—where all the crunching goes on:
The Calcline is the main register, containing the “current value.” It is called
the #-register in RPN mode or the {B82 register in Algebraic mode.
The History Stack is comprised of four registers, including the Calcline, that
contain the current value and the three previous results (or numbers that
haven’t yet been used in a calculation). This Stack is the “workbench” of the
calculator. In the display you will see the three previous-result registers
labeled €13, (22, C3) in Algebraic mode and Y, £, T in RPN mode.
The Storage Registers are ten registers (labeled Reg to Reg9) that you can
put numbers into for later use. R&gB is also known as the [M register for use
with M+, M—, RM, and +M operations (see below).
The Data Registers are created by built-in Solver equations and other Calcu-
lator features and by your Solver equations. They are variable in number and
are usually controlled by the function key menu at the bottom of the display.
Data registers are usually labeled with descriptive names and phrases.
Using the Storage Registers
To use any of the storage registers—Reg# to Reg9—you use the and
keys ((N) and (M) keys when the Calculator is active). Some examples:
Store the Calcline value in Regt:
Recall a value from R294 into the Calcline: ®eO(@)
Add the Calcline value to what is already stored in Regz: ETOH
Subtract the Calcline value to what is already stored in Reg8: (ET0)=)(e)
Multiply what is already stored in R290 by the Calcline value: (ST0)()(5)
Divide what is already stored in R293 by the Calcline value: (ST0)7)(3)
Regl (the Mregister) has a set of shortcuts built onto the basic Calculator menu
(Arithy): +M is a shortcut for (ST0)(0)
RM is a shortcut for Rey(0)
M+ is a shortcut for (STO)(#)(0)
M- is a shortcut for (STO)(=)(0)
Calculator Basics 41