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Section 5: Storing and Recalling Numbers and ALPHA Strings 74
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Remember that because of the Continuous Memory of the HP-41C, all information
in the calculator is retained, even when the calculator is turned off.
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Use CLRG now to clear all currently allocated storage
registers (R00 through
R16).
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Storage Register Arithmetic
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Arithmetic can be performed upon the contents of all storage registers by
executing STO followed by the arithmetic function followed
in turn by the register address. For example:
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Number in X-register is added to the contents of register
R01, and the sum is placed into
R01. The display execution form
of this is ST+.
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Number in X-register is subtracted from the contents of register
R02, and the difference is placed into
R02. The display execution form
of this is ST–.
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Number in X-register is multiplied by the contents of register
R03, and the product is placed into
R03. The display execution form
of this is ST×.
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Number in R04 is divided by the
number in the X-register, and the quotient is placed into
R04. The display execution form
of this is ST÷.
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When storage register arithmetic operations are performed, the HP-41C prompts
for the register address, and the answer is written into the selected storage
register. Unless specified as a register address, the stack remains unchanged.
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Storage Register Arithmetic and the Stack
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You can also specify the stack or LAST X registers for storage register
arithmetic by simply pressing
· (decimal point) and X, Y, Z, T,
or L (for LAST X) as the register address. For example, place the number 50
in the X-register and add the number to itself:
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