HP 48GII Manual page 3

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HP 48GII The User Keyboard
Assignments to shifted and alpha keys
The code .3 used above allowed you to make an assignment to a right-shifted key. You can use the following codes like this: .0 or .1
is the unshifted key, .2 is the left-shifted key, .3 is the right-shifted key, .4 is the unshifted alpha key, .5 is the left-shifted alpha key,
and .6 is the right-shifted alpha key.
This means that if you run out of keys, you can assign objects, commands and functions to unshifted and shifted keys on the Alpha
keyboard too.
To check what key assignments have been made, use the RCLKEYS command. You will see the display showing the result as in
Figure 1.
Figure 1
The result at the bottom of the display is a list made up of { S LENGTH 63.1 FACT 63.3 }. This shows that LENGTH is assigned to
the unshifted X key, and FACT is assigned to the same key, right-shifted. The letter S is a special assignment, meaning that all
keys without a different assignment are assigned to their normal operation. It is possible to remove this assignment. If this is done, all
keys without an assignment become inactive. This can be dangerous, as it can make it difficult to get out of User mode. If that
happens, the RESET button at the back of the calculator can be used to return the calculator to its normal mode.
Add hyperbolic functions to the keyboard
Many calculators have a "hyp" key to make the trig function keys calculate hyperbolic functions. The same can be done on the
HP48GII with the User Keyboard. It would be possible to assign each key separately, but, in this case, it is quicker to make all the
assignments at one time with STOKEYS.
As before, select RPN mode, then type { SINH 53.0 ASINH 53.2 COSH 54.0 ACOSH 54.2 TANH 55.0 ATANH 55.2 } `
STOKEYS ` and then return to Algebraic mode if you wish.
Now press !Ì!Ì and you have the calculator locked in user mode so that the unshifted and shifted S T and
U keys work as hyperbolic functions instead of the normal trig functions. To use them as trig functions again, just press
!Ì to quit out of the User Keyboard.
Deleting Key Assignments
To remove all the assignments made so far, use the DELKEYS command.
In Algebraic mode, type the command DELKEYS(63), or select the DELKEYS() command from the catalog provided when you press
...N and then type 63. Then press `. Alternatively, in RPN mode, type the number 63 first and press `, then type
DELKEYS and press `, or select the command from the catalog and press `. Repeat this for the second assignment, 63.3.
You can delete many keys at the same time by giving DELKEYS a list containing the keys to delete, for example in Algebraic mode
use the list {53.0, 53.2, 54.0, 54.2, 55.0, 55.2} with DELKEYS to delete all the remaining assignments. In RPN mode, the numbers in
the list should be separated by spaces and not commas.
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