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Section 7
Advanced Programming
Controlling the I-Register
The I-register is one of the most powerful programming tools available
on your HP-34C. In addition to serving as a register for the simple storage
and recall of data, the I-register can also be used in conjunction with other
instructions to perform the following:
=
Increment or decrement a specified value from the current value
in I for loop control or other functions.
=
Indirectly control the storage register address of (sT0], (RCL],
and storage register arithmetic.
=
Indirectly control the label address of
and (GsB].
=
Indirectly control the number of digits displayed by the [Fix),
(sci], and [Enc] modes.
=
Transfer execution to any line of occupied program memory.
Storing a Number in the I-Register
To store a numberin the I-register, you use the key sequence
0
(1]. For example, to store the number 7 in the I-register:
Ensure that the PRGM-RUN switch is set to [lMru~ .
Keystrokes
Display
7
0o
7.0000
To recall a number from the I-register into the displayed X-register, you
use the key sequence
™ -
Keystrokes
Display
0.0000
0O
7.0000
A copy of the number stored
in I is recalled.
140
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