Texas Instruments BA II Plus User Manual page 4

The BGN function lets you activate the beginning-of-period or the end-of-period payment.
To understand the configuration of this function, simply press the 2ND and BGN keys. To
the left of your screen, you will then see the END or BGN letters.
To activate the beginning-of-period payment calculation, simply press the 2ND, BGN,
2ND and SET keys. The BGN indicator then appears in the upper-right area of the
display screen. To return to END, simply repeat the 2ND, BGN, 2ND and SET sequence:
the BGN indicator will disappear.
The CE/C key clears the on-screen data without deleting any numerical values that have
been entered.
The CLR TVM function cancels the numeric values and calculation commands and
resets the calculator's default financial values. Before performing each calculation, users
are advised to cancel all previously used numerical values by pressing the 2ND and CLR
TVM keys.
These keys, however, do not affect the beginning-of-year payment (BGN) mode or end-
of-period payment (END) mode or the values attributed to P/Y and C/Y. Therefore, it is
important to make sure that these values have been programmed before performing a
calculation.
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