(C) Copyright Ogham 1987 POCKET CALCULATOR Introduction The Pocket Calculator is listed on the Personal Secretary Menu screen. From the Potpourri Menu, press F4 key to enter the menu for Personal Secretary. Press F10 key to enter the Pocket Calculator program. The program can generate a hard copy of the adding machine tape by creating a disk file that will contain an exact copy of what appears on the screen accounting tape. This option is controlled by the user by answering the question "Do you want a file? Press Y for Yes, N for NO". The response can be either upper or lower case. If the user requires a hard copy, he can, after the calculator session, list or display the hard copy file by selecting the display or print selected file command under the DOS Commands Menu. The user will also be requested to press the Num Lock key to activate the numeric key pad located on the right side of the keyboard. Certain liberties were taken as not all of the caculator symbols are represented on the keyboard. A legend of keys to be used for these symbols will always appear on the calculator screen. Pressing alphabetic keys can be in upper or lower case. The screen accounting tape can list up to 25 entries. After the last line is used the next number will appear on the top of the tape. The user can, at any time, clear the screen tape by pressing the T key. Display, Overflow and Error Detection An error message will appear on the first line of the screen if an error condition occurs. The errors can be: more than six (6) decimal places more than 14 positions in the display window division by zero square root of a negative number Addition and Subtraction Pressing the + or - key places the calculator in the add/subtract mode. When in this mode, the last entry can be used for repeat operations. Example: 4 + 2 + 2 = 8 Key Pressed Display Window Operation Accounting Tape 4 4 0 + 4 add 4 2 2 + 6 add 2 + + 8 add 2 + = 8 equals 8 * C 0 clear 0 Example: 10 - 4 - 4 = 2 Key Pressed Display Window Operation Accounting Tape 10 10 - 10 subtract 10 4 4 - 6 subtract 4 - - 2 subtract 4 - = 2 equals 2 * C 0 clear 0 Multiplication Pressing the * key places the calculator in the multiplication mode. In this mode, the first factor is retained as a constant multiplier. Example: 4 x 6 = 24 x 2 = 8 Key Pressed Display Window Operation Accounting Tape 4 4 0 * 4 multiply 4 6 6 = 24 equals 6 x 24 24 * 2 2 = 8 equals 2 x 8 8 * C 0 clear 0 Power Raise x to the yth power Example 2 x 2 x 2 x 2 = 16 Key Pressed Display Window Operation Accounting Tape 2 2 0 * 2 multiply 2 2 4 2 x 4 * = 8 4 x 8 * = 16 8 x 16 * Division Pressing the / key places the calculator in the division mode and the second factor is retained as the constant divisor. Example: 24 / 3 = 8 / 12 = 4 Key Pressed Display Window Operation Accounting Tape 24 24 0 / 24 divide 24 3 3 = 8.00 equals 3 / 8.00 8.00 * 12 12 = 4.00 equals 3 / 4.00 4.00 * C 0 clear 0 Note: If no decimal place, the calculator will assign two decimal places to the quotient. Percentage Pressing the % places the calculator in the division mode and the quotient will be multiplied by 100. Change Sign The ] key can be pressed at amytime and the sign of the number in the display window will be reversed. Decimal Places The calculator retains the greatest number of decimal places entered (up to six places) until the C key is pressed. The exception is for squared root which will always have five (5) decimal places. Squared Root Example: squared root of 25 is 5.00000 Key Pressed Display Window Operation Accounting Tape 25 25 Q 5.00000 squared 25 5.00000 root 5.0000 Q Clear Pressing the C key will zero out the accumulator, factor (if any) and the number of decimal places. Memory Decimal Places The calculator retains the greatest number of decimal places entered (up to six places) until the Z key is pressed. Add To Memory Press the M key and the number in the display window will be added to memory. Read Memory Press the R key and memory will be displayed. This memory figure can be used for further calculations. Clear Memory Press Z key to clear memory. Example: Key Pressed Display Window Operation Accounting Tape 5 5 0 * 5 multiply 5 6 6 = 30 equals 6 x 30 30 * M 30 add to mem 5 5 + 5 add 5 + 7 7 = 12 equals 12 + M 12 R 42 read mem 42 M Z 30 clear mem C 0 clear 0 Pressing the Esc key will return you to the Personal Secretary Menu and you will be requested to press the Num Lock key so that the cursor keys will be activated. UW'^`C+tvFNFmo9> T ) + J ! i > @ B R  \ *rF"n@`8:a7Z U0?ACODFHX 68Ft+tv}Y^ae -u^`b @N