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readme.txt
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Truth Table Generator Version 1.0
Operation:
There are three modes of operation for the program. Truth table generation, K-map
generation and step through logic. Truth table generation can synthesise truth
tables for one or more named or un-named functions. K-map generation will generate
the K-map for a single named or un-named (it makes no difference to the output)
function however it must be a 2, 3 or 4 variable function. The step through function
will display an easy to read text representation of a function as it is solved for
a particular variable state.
Function Specification:
A function can be named or un-named, an un-named function will have a default name
generated for it and so the operation is exactly the same. The general form of a
function specification is "[<name> = ]<function>". The actual function is a regular
mathematical expression using brackets, variables, constants and logical operators.
If multiple functions are required, they are defined as a comma separated list of
functions.
Operators:
Unary
~ : NOT
Binary
+ : OR
. : AND
^ : XOR
~+ : NOR
~. : NAND
~^ : XNOR
Precedence:
Functions are evaluated in the following order:
BRACKETS, NOT, XOR, XNOR, AND, NAND, OR, NOR
Order:
The order variables are listed in tables are, by default, the same as they are
found in the function specification. However this can be modified by appending
the function with a space separated list of the variable names in square brackets.
Examples:
Truth Table Generation: "C.A.~B"
C A B | Output0
---------------
0 0 0 | 0
0 0 1 | 0
0 1 0 | 0
0 1 1 | 0
1 0 0 | 0
1 0 1 | 0
1 1 0 | 1
1 1 1 | 0
Truth Table Generation: "Y = C.A.B [A B C]"
A B C | Y
---------
0 0 0 | 0
0 0 1 | 0
0 1 0 | 0
0 1 1 | 0
1 0 0 | 0
1 0 1 | 1
1 1 0 | 0
1 1 1 | 0
Truth Table Generation: "Y1 = A^B, Y2 = A.~B + ~A.B"
A B | Y1 Y2
-----------
0 0 | 0 0
0 1 | 1 1
1 0 | 1 1
1 1 | 0 0
Truth Table Generation: "Y1 = A~^B, Y2 = ~A.~B + A.B"
A B | Y1 Y2
-----------
0 0 | 1 1
0 1 | 0 0
1 0 | 0 0
1 1 | 1 1
K-map Generation: "Y = A^C.B^D + B.D.(A^C) [A B C D]"
A B | 00 01 11 10
C D |
----------------------
0 0 | 0 0 1 0
0 1 | 0 0 1 1
1 1 | 1 1 0 0
1 0 | 0 1 0 0
Step-Through: "A^B + C~^D", Variable="10"
(A XOR B OR C XNOR D)
(1 XOR B OR C XNOR D)
(1 XOR 0 OR C XNOR D)
(1 XOR 0 OR 1 XNOR D)
(1 XOR 0 OR 1 XNOR 0)
( 1 OR 1 XNOR 0)
( 1 OR 0 )
( 1 )
Step-Through: "(((A^B) + C)~^D)", Variable="10"
((((A XOR B) OR C) XNOR D))
((((1 XOR B) OR C) XNOR D))
((((1 XOR 0) OR C) XNOR D))
(((( 1 ) OR C) XNOR D))
((( 1 OR C) XNOR D))
((( 1 OR 1) XNOR D))
((( 1 ) XNOR D))
(( 1 XNOR D))
(( 1 XNOR 0))
(( 0 ))
( 0 )
License:
This software is licensed under the terms of the GPL v3.0 license, a copy of which is given below.
GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.
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Later license versions may give you additional or different permissions. However, no additional obligations are imposed on any author or copyright holder as a result of your choosing to follow a later version.
15. Disclaimer of Warranty.
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
16. Limitation of Liability.
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided above cannot be given local legal effect according to their terms, reviewing courts shall apply local law that most closely approximates an absolute waiver of all civil liability in connection with the Program, unless a warranty or assumption of liability accompanies a copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS