TM5-6675-326-14
8-3.1 Power Supply .
Power is provided to the calculator from either the
battery pack or ac adapter/recharger.
The battery pack consists of two
rechargeable nickel-cadmium batteries which give the calculator full
p o r t a b i l i t y .
The ac adapter/recharger also provides power to the
calculator when plugged into a power outlet.
When battery pack is in need
of recharging, a raised decimal is turned on at the far left of the
display. When raised decimal is displayed, there are between 1 and 25
m i n u t e s o f o p e r a t i n g t i m e l e f t .
8 - 3 . 2 K e y b o a r d .
The keyboard is used to select functions and input
numbers into the calculator.
A l l k e y s , e x c e p t q a n d q k e y s , p e r f o r m
t h r e e f u n c t i o n s .
One function is indicated by the symbol on the flat
surface of the key, a second by the symbol on the slanted key face, and a
third by the symbol written above the key on the calculator case.
Function printed on the flat face of the key is selected by pressing the
key. The function printed on the slanted face of the key is selected by
f i r s t p r e s s i n g p r e f i x k e y q a n d t h e n t h e f u n c t i o n k e y . F u n c t i o n p r i n t ed
above the key is selected by first pressing prefix key q and then the
function key.
8 - 3 . 3 D i s p l a y.
The display is the X-register of the automatic memory
stack and provides a visual readout of latest numeric entry, operation
result, or error message.
8-3.4 Memory.
Memory is divided into two parts; storage registers and
automatic memory stack.
8 - 3 . 4 . 1 S t o r a g e r e g i s t e r s.
Storage registers are used to set aside
n u m b e r s f o r r e c a l l i n l a t e r c a l c u l a t i o n s .
Numbers are stored by first
p r e s s i n g l=] followed by a number through~or a decimal point and a
number through q .
The number in displayed X-register is then copied
i n t o t h e s e l e c t e d r e g i s t e r.
Recalling a number is accomplished by first
p r e s s i n g [~ followed by a number~through~or a decimal point and a
number~through~.
The number that is in the selected register will be
copied into the displayed X-register without any change to contents of
t h a t r e g i s t e r.
Storage registers R.0 t h r o u g h R.5 are used for accumula-
t i o n o f s t a t i s t i c a l d a t a . T u r n i n g c a l c u l a t o r O F F w i l l c l e a r ( p l a c e z e r o s
i n ) a l l s t o r a g e r e g i s t e r s .
8-3.4.2 Automatic Memory Stack.
The automatic memory stack is used to
s t o r e i n t e r m e d i a t e r e s u l t s d u r i n g c a l c u l a t i o n s.
The stack consists of
four registers designated X, Y, Z, and T.
The contents of X-register are
constantly shown on the calculator display.
Numbers are manually entered
into memory stack by pressing -1.
During chain calculations (long
equations), intermediate answers are automatically entered in the memory
s t a c k.
Each new entry into the stack is first entered in the X-register
and, with each additional entry, the stack rolls up one and the contents
t h a t w e r e i n t h e T - r e g i s t e r b e f o r e r o l l - u p , a r e l o s t.
The contents of the
8-3
