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keyboard.rst

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.. index:: keyboard layout

Application

Ladybug makes use of the application shell concept from the OS4 module to redefine the HP-41 keyboard to be somewhat different compared to normal, while still retaining essentially all behavior you are used to. The default display behavior is also changed to display integer number in the selected base.

calculator.png

The alpha mode keyboard is also slightly modified and hass the ALDI function where ARCL normally is.

.. index:: activation

Activation

Once Ladybug has been plugged into your calculator, simply execute the INTEGER instruction to enable integer mode.

.. index:: deactivation

Deactivation

Once activated, the HP-41 stays in integer mode until you execute the EXITAPP instruction. This can be done by pressing the shift key followed by the USER key. It is also possible to execute the EXITAPP instruction using the XEQ key and spell it out as usual.

Another way to disable Ladybug is to turn the calculator off and unplug the module.

The shifted USER key can also be used in alpha mode to exit integer mode.

Secondary functions

Ladybug makes use of the secondary functions feature of OS4. To access these functions you need the Boost module installed which contains replacements for the XEQ and ASN functions to allow keyboard access to the secondary functions in the same way as ordinary functions.