HP -67 Owner's Handbook Manual page 235

Using the I-Register for Indirect Control 231
Ensure that the W/PRGM-RUN switch werem [J[JRUN is set to
RUN.
Press
[cLxJosP Iy
0 =
0=
0 =
50 (s1y
1.23 &8 @
240 (s17
85083 @
120 (s17
77 G323 43
Display
Clears all storage
registers, including the
I-register, to zero.
Stores the number5 in the
I-register.
1.23 Stores the number 1.23 in
the storage register
addressed by the number
in I—that is, storage
register Rs.
24.00 This numberstored in the
the I-register.
85083.00 This numberstored in the
storage register (Rg)
addressed by the current
number (24) in 1.
12.00 Stores the number 12 in
the I-register.
77. 43
7.700000000 44| Stores the number 7.7 X
10**in the storage register
addressed by the number
in I—thatis, in secondary
storage register Rg,.
Notice that the number was stored directly in secondary storage
register Rg,. You do not have to use the function to access the
secondary storage registers when using the [@ function.