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- ProCalc - programmable calculator
-
-
-
- Overview
-
- The program ProCalc simulates a programmable
- calculator based on the HP11C from Hewlett-Packard.
- This document describes only the differences bet-
- ween the simulation and the original. For special
- informations about the functions, please read the
- Owner's Handbook for the HP11C (Hewlett-Packard
- Part Number 00011-9001) or the german describtion
- for this program. (Sorry, my english is not good
- enough to translate that. Perhabs someone else will
- do that for me.)
-
-
- Differences simulation - original
-
- - Not the same rounding characteristics: If the
- digit to round is five, and there are no
- digits following or only zeros: if the digit
- in front of the digit to round is even,
- ProCalc rounds up instead of round off; if the
- digit in front of the digit to round is odd,
- ProCalc rounds off instead of round up. These
- are the correct rules to round a number. The
- HP11C rounds up the digit five always.
-
- - inaccuracies of trigonometric functions when
- the correct result is zero. (This happens also
- on the original.)
-
- - x! : Gamma-function is not implemented at the
- moment
- (in fact: I don't know how to do it with a
- simple and short algorithm). If you try it
- with a real number, an ERROR 0 occurs.
-
- - The program-memory takes always 249 lines.
- There are always 20 data-registers (+ I-regis-
- ter). There is no conversion between program-
- memory and data-registers.
-
- - The function STO RAN# don't exist. The calcu-
- lation of a random-number don't need a star-
- ting value.
-
- - There are no check-function and (in this ver-
- sion) no adjustment for the decimal-character.
- But there are two different versions: a eng-
- lish and a german one.
-
- - ProCalc uses only short-cut key-sequences. The
- f- and g-key always starts a new key-sequence.
- A not-ended key-sequence will be erased.
-
- - The MEM-function shows you only the number of
- free program-lines.
-
- - After an ERROR, the ON-key is also locked.
- That means, it won't turn off the calculator.
- It deletes only the error-message like all
- other keys.
-
- - Every function is started (or inserted in a
- program) after you have released the specified
- key (the last key in a sequence). Therefore
- you cannot extend the message of the CLEAR-
- PREF-, MEM- and in RUN-mode of the SST- and
- BST-function by holding down the specified key
- (as you can do it with the HP11C).
-