!!!!    6    0    1  989956401  V3743                                         

! Device           : 74s474
! Function         : PROM, 3-state 512 x 8
! 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 on high-impedance outputs."

assign  VCC         to pins 24
assign  GND         to pins 12

assign  Data_output to pins 17,16,15,14,13,11,10,9
assign  Data_D0     to pins 9    !AT Added for minimum pin test.
assign  Data_D1     to pins 10   !AT Added for minimum pin test.
assign  Data_D2     to pins 11   !AT Added for minimum pin test.
assign  Data_D3     to pins 13   !AT Added for minimum pin test.
assign  Data_D4     to pins 14   !AT Added for minimum pin test.
assign  Data_D5     to pins 15   !AT Added for minimum pin test.
assign  Data_D6     to pins 16   !AT Added for minimum pin test.
assign  Data_D7     to pins 17   !AT Added for minimum pin test.

assign  Address     to pins 23,1,2,3,4,5,6,7,8
assign  No_connection to pins 22
assign  Chip_select to pins 18,19,20,21

family  TTL

power   VCC, GND

inputs  Address, Chip_select
nondigital No_connection
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   to "0ZZZ"
disable Data_output  with Chip_select   to "Z0ZZ"
disable Data_output  with Chip_select   to "ZZ1Z"
disable Data_output  with Chip_select   to "ZZZ1"

when Chip_select is "0XXX" inactive Data_output
when Chip_select is "X0XX" inactive Data_output
when Chip_select is "XX1X" inactive Data_output
when Chip_select is "XXX1" inactive Data_output

trace Data_output to Address, Chip_select

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

vector    Count_vector
set  Chip_select         to "1100"
set  Data_output         to "00000000"
set  Address             to "000000000"
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         to "1100"
set  Data_D0             to "0"
set  Address             to "000000000"
graycounter              Address
end vector

vector    Count_vector_D1
set  Chip_select         to "1100"
set  Data_D1             to "0"
set  Address             to "000000000"
graycounter              Address
end vector

vector    Count_vector_D2
set  Chip_select         to "1100"
set  Data_D2             to "0"
set  Address             to "000000000"
graycounter              Address
end vector

vector    Count_vector_D3
set  Chip_select         to "1100"
set  Data_D3             to "0"
set  Address             to "000000000"
graycounter              Address
end vector

vector    Count_vector_D4
set  Chip_select         to "1100"
set  Data_D4             to "0"
set  Address             to "000000000"
graycounter              Address
end vector

vector    Count_vector_D5
set  Chip_select         to "1100"
set  Data_D5             to "0"
set  Address             to "000000000"
graycounter              Address
end vector

vector    Count_vector_D6
set  Chip_select         to "1100"
set  Data_D6             to "0"
set  Address             to "000000000"
graycounter              Address
end vector

vector    Count_vector_D7
set  Chip_select         to "1100"
set  Data_D7             to "0"
set  Address             to "000000000"
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    511 times
count     Count_vector    compress
end repeat
end unit

!    End of test