HP HP-67 - Storage Register Overflow

Storing and Recalling Numbers 83
(You could also work this problem using the stack alone, but doing
it as shown here illustrates how storage register arithmetic can be
used to maintain and update different running totals.)
Storage Register Overflow
If you attempt a storage register arithmetic operation that would cause
the magnitude of a number in any of the storage registers to exceed
9.999999999 X 10%, the operation is not performed and the HP-67
display immediately indicates )
When you then press any key, the error condition is cleared and the
last value in the X-register before the error is again displayed. The
storage registers all contain the values they held before the error-
causing operation was attempted.
For example, if you store 7.33 X 10°% in primary register R; and
attempt to use storage register arithmetic to multiply that value by
10%, the HP-67 display will show :
Press Display
7.33
G 52 7.33 52
1
(=3 50
81
To clear the error and display the contents of the X-register, press
any key. The original contents of storage register R, are still present
there.
Press Display
1.000000000 50] Contents of X-register.
1 7.330000000 52] Contents of storage
register R;.