HP 12C Financial calculator - Manual (Page 172)

172 Appendix A: The Automatic Memory Stack
File name: hp 12c_user's guide_English_HDPMBF12E44 Page: 172 of 209
Printered Date: 2005/7/29 Dimension: 14.8 cm x 21 cm
Termination of Digit Entry
The first digit keyed in after digit entry has been terminated replaces the number
already in the displayed X-register. Digit entry is automatically terminated when
any key is pressed (except for digit entry keys — digit keys,., Þ, and É —
and prefix keys — f, g,?, :, and i).
Stack Lift
When the stack lifts, the number in each stack register is copied into the register
above, and the number formerly in the T-register is lost. The number formerly in the
X-register is then contained in both the X-register and the Y-register.
When a number is entered into the displayed X-register — either from the
keyboard, from a storage register (using :), or from the LAST X register (using
F) — the stack usually lifts first. The stack does not lift if the last key pressed
before a number is entered was one of the following: \, O, _, ^, A or
C.
* If one of these keys was the last key pressed, the number in the displayed
X-register is replaced when a new number is entered.
Rearranging Numbers in the Stack
The key
Pressing ~ exchanges the numbers in the X- and
Y-registers.
Certain functions (Т, П, !, E, V, Э, #, Ц, v, R, and Q)
return answers to the Y-register as well as to the displayed X-register. The ~ key,
since it exchanges the number in the Y-register with that in the displayed X-register,
is used to display the second number calculated.
The Key
When d (roll down) is pressed the number in each
stack register is copied into the register below, and the
number formerly in the X-register is copied into the
T-register.
* In addition, the stack does not lift when a number is entered if the last operation performed
was storing a number into a financial register. For example, the stack will not lift when a
number is entered following the sequence 100000$, but will lift when a number is entered
following the sequence 100000$M. Note also that although the stack lifts when \ is
pressed, it does not lift when a number is entered after \ is pressed.