!!!!    6    0    1  989258300  Va399                                         

! Device           : 74s471
! Function         : PROM 3-state 256 x 8 Bit
! revision         : B.01.00
! safeguard        : standard_sttl
! Modifications    : Modified for AwareTest xi
!
  warning           "This library has not been verified with hardware."

sequential

! warning "Pull-ups are required to test high-impedance outputs."

assign  VCC         to pins 20
assign  GND         to pins 10

assign  Data_output to pins 14,13,12,11,9,8,7,6
assign  Data_D0     to pins 6    !AT Added for minimum pin test.
assign  Data_D1     to pins 7    !AT Added for minimum pin test.
assign  Data_D2     to pins 8    !AT Added for minimum pin test.
assign  Data_D3     to pins 9    !AT Added for minimum pin test.
assign  Data_D4     to pins 11   !AT Added for minimum pin test.
assign  Data_D5     to pins 12   !AT Added for minimum pin test.
assign  Data_D6     to pins 13   !AT Added for minimum pin test.
assign  Data_D7     to pins 14   !AT Added for minimum pin test.

assign  Address     to pins 19,18,17,5,4,3,2,1

assign  Chip_select_bar to pins 16,15

family  TTL

power   VCC, GND

inputs  Address, Chip_select_bar

outputs Data_output
outputs Data_D0, Data_D1, Data_D2, Data_D3 !AT Added for minimum pin test.
outputs Data_D4, Data_D5, Data_D6, Data_D7 !AT Added for minimum pin test.

disable Data_output with Chip_select_bar to "1X"
disable Data_output with Chip_select_bar to "X1"

when Chip_select_bar is "X1" inactive Data_output
when Chip_select_bar is "1X" inactive Data_output

trace Data_output to Address, Chip_select_bar

!*********************************************************************
!*********************************************************************

vector    Count_vector
     set  Chip_select_bar     to "00"
     set  Data_output         to "00000000"
     set  Address             to "00000000"
     graycounter              Address
end vector

!AT The following vectors have been added for a minimum pins test. Any
!AT vectors that references the data bus was copied and modified to reference
!AT only a single pin of the data bus.

vector    Count_vector_D0
     set  Chip_select_bar     to "00"
     set  Data_D0             to "0"
     set  Address             to "00000000"
     graycounter              Address
end vector

vector    Count_vector_D1
     set  Chip_select_bar     to "00"
     set  Data_D1             to "0"
     set  Address             to "00000000"
     graycounter              Address
end vector

vector    Count_vector_D2
     set  Chip_select_bar     to "00"
     set  Data_D2             to "0"
     set  Address             to "00000000"
     graycounter              Address
end vector

vector    Count_vector_D3
     set  Chip_select_bar     to "00"
     set  Data_D3             to "0"
     set  Address             to "00000000"
     graycounter              Address
end vector

vector    Count_vector_D4
     set  Chip_select_bar     to "00"
     set  Data_D4             to "0"
     set  Address             to "00000000"
     graycounter              Address
end vector

vector    Count_vector_D5
     set  Chip_select_bar     to "00"
     set  Data_D5             to "0"
     set  Address             to "00000000"
     graycounter              Address
end vector

vector    Count_vector_D6
     set  Chip_select_bar     to "00"
     set  Data_D6             to "0"
     set  Address             to "00000000"
     graycounter              Address
end vector

vector    Count_vector_D7
     set  Chip_select_bar     to "00"
     set  Data_D7             to "0"
     set  Address             to "00000000"
     graycounter              Address
end vector

!*********************************************************************
!*********************************************************************

!AT The following AwareTest units have been added for minimum pins tests. Each
!AT unit tests a separate data pin starting with D0.

unit "awaretest D0 Test"
     preset counter      Count_vector_D0    compress
     repeat    255 times
          count     Count_vector_D0    compress
     end repeat
end unit

unit "awaretest D1 Test"
     preset counter      Count_vector_D1    compress
     repeat    255 times
          count     Count_vector_D1    compress
     end repeat
end unit

unit "awaretest D2 Test"
     preset counter      Count_vector_D2    compress
     repeat    255 times
          count     Count_vector_D2    compress
     end repeat
end unit

unit "awaretest D3 Test"
     preset counter      Count_vector_D3    compress
     repeat    255 times
          count     Count_vector_D3    compress
     end repeat
end unit

unit "awaretest D4 Test"
     preset counter      Count_vector_D4    compress
     repeat    255 times
          count     Count_vector_D4    compress
     end repeat
end unit

unit "awaretest D5 Test"
     preset counter      Count_vector_D5    compress
     repeat    255 times
          count     Count_vector_D5    compress
     end repeat
end unit

unit "awaretest D6 Test"
     preset counter      Count_vector_D6    compress
     repeat    255 times
          count     Count_vector_D6    compress
     end repeat
end unit

unit "awaretest D7 Test"
     preset counter      Count_vector_D7    compress
     repeat    255 times
          count     Count_vector_D7    compress
     end repeat
end unit

unit "ROM test"
     preset counter      Count_vector    compress
     repeat    255 times
          count     Count_vector    compress
     end repeat
end unit

!    End of test