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Accessing Stack Register Contents - HP 35s User Manual

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Accessing Stack Register Contents

The values held in the four stack registers, X, Y, Z and T, are accessible in RPN
mode in an equation or program using the REGX, REGY, REGZ and REGT
To use these instructions, press
first. Then, pressing
produces a menu in
the display showing the X–, Y–, Z–, T–registers. Pressing
will move the
underline symbol, indicating which register is presently selected. Pressing
will place an instruction into a program or equation that recalls the value of the
chosen stack register for further use. These are displayed as REGX, REGY, REGZ,
and REGT.
For example, a program line entered by first pressing
and then entering the
instructions REGX x REGY x REGZ x REGT will compute the product of the values in
the 4 stack registers and place the result into the X-register. It will leave the previous
values of X, Y, and Z in the stack registers Y, Z, and T.
Many such efficient uses of values in the stack are possible in this manner that
would not otherwise be available on the HP35s.
User Memory and the Stack


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