TM5-6675-326-14
6-4 DESCRIPTION AND USE OF OPERATOR’S CONTROLS AND INDICATORS - Continued
Key
C o n t r o l o r I n d i c a t o r
Function
S u b t r a c t a r i t h m e t i c/
~: S u b t r a c t s n u m b e r in
X<O? k ey
X-memory from number in
Y-memory.
X<ol:
Used in programs
to compare number in
X - r e g i s t e r t o 0 .
I f x i s
l e s s t h a n 0 , c a l c u l a t or
performs next program
s t e p.
I f X i s n o t l e s s
t h a n 0 , c a l c u l a t o r s k i ps
next program step.
A d d a r i t h m e t i c / h o u r s ,
minutes, seconds key
Rt/R4
roll
stack
key
X~Y/X~I m a n i p u l a t i on
key
+:
Adds number in X-
register to number in
Y - r e g i s t e r .
H.MS+:
Adds hours,
minutes, and seconds, or
degrees, minutes, and
seconds in the Y-register
to those displayed in the
X - r e g i s t e r .
D1
: I n s t r u c t s c a l c u l a t or
to roll down contents of
automatic memory stack (X,
Y, Z, and T) into
X - r e g i s t e r.
Each time new
number is displayed, old
one moves to top of stack.
First value moved is in
Y - r e g i s t e r .
R4:
I n s t r u c t s c a l c u l a t or
t o r o l l u p c o n t e n t s of
automatic memory stack (X,
Y, Z, and T) into
X - r e g i s t e r , s t a r t i n g w i th
number In T-register .
El’
Interchanges numbers
in X- and Y-memory registers.
X ~1:
Interchanges
numbers in X- and I-memory
r e g i s t e r s .
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