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HP HP-12c Manual

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Section 8: Programming Basics 89
Identifying Instructions in Program Lines
Each key on the HP 12C Platinum keyboard – except for the digit keys 0 through
9 – is identified by a two-digit “keycode” that corresponds to the key’s position
on the keyboard. The first digit in the keycode is the number of the key row,
counting from row 1 at the top; the second digit is the number of the key in that
row, counting from 1 for the first key in the row through 9 for the ninth key in the
row and 0 for the tenth key in the row. The keycode for each digit key is simply
the digit on the key. Thus, when you keyed the instruction b into program
memory, the calculator displayed
004, 25
This indicates that the key for the instruction in program line 004 is in the second
row on the keyboard and is the fifth key in that row: the b key. When you
keyed the instruction + into program memory, the calculator displayed
007, 40
This indicates that the key for the instruction in program line 007 is in the fourth
row on the keyboard and is the tenth key in that row: the + key. When you
keyed the digit 5 into program memory, the keycode displayed was only the
digit 5.
Since keystroke sequences beginning with f, g, ?, :, and i are
stored in only one program line, the display of that line would show the keycodes
for all the keys in the keystroke sequence.
Instruction Keycode
gÒ
nnn, 43 26
?=1
nnn,44 40 1
gi000
nnn,43,33,000
2
=
hp 12c platinum
financial calculator
… 89 …


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