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Section 3: Functions 43
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Conversions
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The conversions are listed in Figure 3-2. The conversions all expect an input value in
the X-register and leave the result there. Note that angle conversions are
given in Figure 3-1.
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Sample Case: Octal/Decimal Conversions. Many computers are designed to work with octal
(base 8) numbers instead of decimal (base 10) numbers. The OCT function on your HP-65
allows you to make octal/decimal conversions with ease. For example, find the octal equivalent
of the decimal number 512.
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Press
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See Displayed
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Comment
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512 f OCT
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Octal representation of 51210.
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Convert the octal number 2000 to its decimal equivalent:
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2000 f-1 OCT
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Decimal equivalent of 20008.
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Sample Case: Truncating at Decimal Point. The Personal Investment Program
(presented in the Introduction) expects you to key in the dates using the format mm.yyyy.
The program separates mm from yyyy using the truncation functions. Do the same for
the date 12.1980.
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Press
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See Displayed
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Comment
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DSP 4
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12.1980
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fINT
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Answer: integer part.
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gLSTX
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Recall original value.
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f-1INT
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Answer: fractional part.
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DSP 2
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Reset display to two places.
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Sample Case: Absolute Value. Some Calculations require the magnitude of a number.
To get this from the keyboard, you could observe the number and change the sign if negative
(using CHS).
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