Further Information; Index Register Contents - HP -15C Owner's Handbook Manual

Section 10: The Index Register and Loop Control
To display fixed point notation for all possible decimal places on the
HP-15C:
Keystrokes
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´ B

Further Information

Index Register Contents

Any value stored in the Index register can be referenced in three different
ways:
 Using V like any other storage register. The value in R
manipulated as it is: stored, recalled, exchanged, added to, etc.
 Using V as a control number. The absolute value of the integer
portion in R
branching, flag control, and display format control with V, only this
portion is used. For loop control, the fractional portion is also used, but
separately from the integer portion.
 Using % as a reference to the contents of another storage register.
The % key uses the indirect addressing system shown in the tables on
pages 107 and 108. (In turn, the contents of that second register may be
used as a loop control number, in the fashion described above.)
*
This is also true for the value in any storage register used for indirect loop control.
Display
9.000000000
8.00000000
7.0000000
6.000000
5.00000
4.0000
3.000
2.00
1.0
0.
0.
is a separate entity from the fractional portion. For indirect
I
Run mode.
Display at ´©instruction.
Display when program halts.
*
115
can be
I