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The Key Board

The picture above is a reproduction of the HP48G/GX keyboard. Since it is not my desire to overwhelm, not all of the keyboard is portrayed. Only the most needed labels are included.

The key in row 9 and column 1 is used to turn the calculator on and off. To turn the HP48G/GX on push tex2html_wrap607 . Notice the word cancel below this key. If the calculator is already turned on, this key now functions as a cancel key. To turn the calculator off push 2pt tex2html_wrap609 tex2html_wrap607 . A second key we need to discuss is tex2html_wrap613 . This key enables the alpha input mode of the HP48G/GX. For example to enter the character A, push tex2html_wrap613 tex2html_wrap617 . If more than one alpha character needs to be entered, either hold down the alpha key while entering the charactors, or push the alpha key twice to place the HP48G/GX in permanent alpha mode. To leave alpha mode, push the alpha key one more time, or push tex2html_wrap619 . To enter a lower case letter push tex2html_wrap613 2pt tex2html_wrap623 , and then the desired letter. Note: Greek letters can be entered by using tex2html_wrap613 2pt tex2html_wrap609 .

Notice the four keys that have arrows on them in rows two and three. On the actual keyboard these are triangles, not arrows, and these keys are used to move the cursor. There is a fifth key, in row 5 and column 6, that also has an arrow on it. This key is used to edit our input. For example, suppose we wanted to enter the number 78 and instead pushed the key tex2html_wrap629 twice, that is we had 77 on the command line. To correct this typo, push the tex2html_wrap631 key once to delete the second 7. Then push tex2html_wrap633 tex2html_wrap619 .

Each key has more than one label associated with it. For example, the key tex2html_wrap637 can be used for three different calculations. To compute tex2html_wrap_inline585 , push the keys tex2html_wrap639 tex2html_wrap641 2pt tex2html_wrap623 \ tex2html_wrap637 . To compute log 15, push tex2html_wrap647 tex2html_wrap641 2pt tex2html_wrap609 \ tex2html_wrap637 . To compute tex2html_wrap_inline599 , push tex2html_wrap641 tex2html_wrap657 tex2html_wrap659 tex2html_wrap637 . Pushing 2pt tex2html_wrap623 followed by a key stroke activates the command whose symbol appears at the top left of the key pushed, and pushing 2pt tex2html_wrap609 will activate the command shown on the top right of the key.


next up previous
Next: Reverse Polish Notation Up: How to Use the Previous: Introduction

Mike Stecher
Thu Mar 21 09:53:31 CST 1996