HP HP-67 - Page 114

110 Function Keys
To use only the 3x and 2y that you have accumulated in the secondary
storage registers, you can press followed by 23 . This brings 2x
into the displayed X-register and 3y into the Y-register, overwriting
the contents of those two stack registers. The stack does not lift. (This
feature is particularly useful when performing vector arithmetic, like
that illustrated on pages 118-120.)
To use any of the summations individually, simply exchange the
contents of the secondary storage registers with the primary registers
by pressing (£5); then recall the desired summation by pressing
followed by the number key of the register address.
Example: Find 2x, 2x2, 3y, 3y?, and 3xy for the paired values of
x and y listed below.
Press Display
0B Crea) @ Ensures that storage
registers Rg, through Rgg
contain all zeros initially.
(Display assumes no
results remain from
previous example.)
7
5
First
pair
is
accumulated;
5 T
3 2.00 Second pair is accumu-
. o lated; n 2.
8 Third pair is accumu-
lated; n = 3.
a 3.00 Brings contents of
secondary registers into
primary registers.