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Annotation of researchv10dc/man/man10/minterm.10.5, revision 1.1.1.1

1.1       root        1: .TH MINTERM 10.5 UCDS
                      2: .SH NAME
                      3: minterm \- minterm file format
                      4: .SH DESCRIPTION
                      5: The
                      6: .I minterm
                      7: file format consists of at least one binary valued function
                      8: definition.
                      9: A function definition begins
                     10: .B .o
                     11: .I n ...
                     12: followed by line(s) that have the form
                     13: .IR term : mask
                     14: \&...
                     15: The first
                     16: .I n
                     17: following
                     18: .B .o
                     19: is a numeric symbol of the function
                     20: (usually an output pin number of a rom or pal integrated circuit).
                     21: Any other
                     22: .IR n 's
                     23: are numeric symbols of input binary variables.
                     24: .I Term
                     25: and
                     26: .I mask
                     27: are decimal numbers.
                     28: .PP
                     29: There is a correspondence between the bits of the numbers in binary
                     30: representation and the input symbols, the first input symbol
                     31: is associated with the least significant bit.
                     32: The meaning of a bit with value 1 in
                     33: .I mask
                     34: is `do care',
                     35: and the meaning of a bit with value 1 in
                     36: .I term
                     37: is `input must be 1'.
                     38: Thus the
                     39: .IR term : mask
                     40: is a implicant, and a set of them when
                     41: .IR or 'ed
                     42: together
                     43: describes the input conditions for which the output symbol will have
                     44: a value of 1.
                     45: .PP
                     46: For example:
                     47: .IP
                     48: .ft 8
                     49:  .o 3 1 2
                     50:  3:3
                     51:  .o 4 1 2
                     52:  1:3 2:3 3:3
                     53:  .o 5 2 3
                     54:  1:3 2:3
                     55:  .o 11
                     56:  .o 9
                     57:  0:0
                     58: .ft
                     59: .PP
                     60: Output 3 is the
                     61: .I and
                     62: function of inputs 1 and 2;
                     63: output 4 is the
                     64: .I or
                     65: function of inputs 1 and 2
                     66: .RI ( quine (10.1)
                     67: would change this to 1:1 2:2);
                     68: output 5 is the
                     69: .I exclusive-or
                     70: function of inputs 2 and 3;
                     71: output 11 is a constant 0 and output 9 is
                     72: a constant 1.
                     73: .SH SEE ALSO
                     74: .IR lde (10.1),
                     75: .IR quine (10.1),
                     76: .IR cover (10.1),
                     77: .IR hazard (10.1),
                     78: .IR pal (10.1)

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