HP49G Calculator Easter Egg - Game Tetris HP49G Calculator

First turn on the calculator.
Then use the blue button (shift) to select F4 (2D/3D). In the dialog box choose "Type -> Fast3D"
Then in "EQ" select "the red shift button" and x(by) to put the quotes.
Finally, write "HpMad". With the quotes written before (not additional, just one pair of quotes).
To write this use double "ALPHA" button and to write not capital letters use "the blue shift button".
Then press "ENTER" button.

Play with buttons 2 (left), 5 (rotate) and 8 (right).