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wave.do.bak
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# Set the working dir, where all compiled Verilog goes.
vlib work
# Compile all Verilog modules in mux.v to working dir;
# could also have multiple Verilog files.
# The timescale argument defines default time unit
# (used when no unit is specified), while the second number
# defines precision (all times are rounded to this value)
vlog -timescale 1ns/1ns ALU.v four_bit_adder.v segment7encoder.v
# Load simulation using mux as the top level simulation module.
vsim ALU
# Log all signals and add some signals to waveform window.
log {/*}
# add wave {/*} would add all items in top level simulation module.
add wave {/*}
# test fcn 1111 + 1 = 10000
force {KEY[0]} 0
force {SW[0]} 0
force {SW[1]} 0
force {SW[2]} 0
force {SW[3]} 0
force {SW[4]} 0
force {SW[5]} 0
force {SW[6]} 0
force {SW[7]} 0
force {SW[9]} 0
run 10ns
# test fcn 0 - 1111 + 1 = 10000
force {KEY[0]} 1
force {SW[0]} 0
force {SW[1]} 0
force {SW[2]} 0
force {SW[3]} 0
force {SW[4]} 0
force {SW[5]} 0
force {SW[6]} 0
force {SW[7]} 0
force {SW[9]} 0
run 10ns
# test fcn 0 - 1111 + 1 = 10000
force {KEY[0]} 0
force {SW[0]} 0
force {SW[1]} 0
force {SW[2]} 0
force {SW[3]} 0
force {SW[4]} 0
force {SW[5]} 0
force {SW[6]} 0
force {SW[7]} 0
force {SW[9]} 1
run 10ns
# add a + b
force {KEY[0]} 1
force {SW[0]} 1
force {SW[1]} 1
force {SW[2]} 0
force {SW[3]} 0
force {SW[4]} 0
force {SW[5]} 1
force {SW[6]} 0
force {SW[7]} 0
force {SW[9]} 1
run 10ns
# add a + b
force {KEY[0]} 0
force {SW[0]} 1
force {SW[1]} 1
force {SW[2]} 0
force {SW[3]} 0
force {SW[4]} 0
force {SW[5]} 1
force {SW[6]} 0
force {SW[7]} 0
force {SW[9]} 1
run 10ns
# mutiply by 2
force {KEY[0]} 1
force {SW[0]} 1
force {SW[1]} 1
force {SW[2]} 1
force {SW[3]} 1
force {SW[4]} 0
force {SW[5]} 1
force {SW[6]} 1
force {SW[7]} 1
force {SW[9]} 1
run 10ns
# mutiply by 2
force {KEY[0]} 0
force {SW[0]} 1
force {SW[1]} 1
force {SW[2]} 1
force {SW[3]} 1
force {SW[4]} 0
force {SW[5]} 1
force {SW[6]} 1
force {SW[7]} 1
force {SW[9]} 1
run 10ns
# mutiply by 2
force {KEY[0]} 1
force {SW[0]} 1
force {SW[1]} 1
force {SW[2]} 1
force {SW[3]} 1
force {SW[4]} 0
force {SW[5]} 1
force {SW[6]} 1
force {SW[7]} 1
force {SW[9]} 1
run 10ns
# mutiply by 2
force {KEY[0]} 0
force {SW[0]} 1
force {SW[1]} 1
force {SW[2]} 1
force {SW[3]} 1
force {SW[4]} 0
force {SW[5]} 1
force {SW[6]} 1
force {SW[7]} 1
force {SW[9]} 1
run 10ns
# mutiply by 2
force {KEY[0]} 1
force {SW[0]} 1
force {SW[1]} 1
force {SW[2]} 1
force {SW[3]} 1
force {SW[4]} 0
force {SW[5]} 1
force {SW[6]} 1
force {SW[7]} 1
force {SW[9]} 1
run 10ns
# mutiply by 2
force {KEY[0]} 0
force {SW[0]} 1
force {SW[1]} 1
force {SW[2]} 1
force {SW[3]} 1
force {SW[4]} 0
force {SW[5]} 1
force {SW[6]} 1
force {SW[7]} 1
force {SW[9]} 1
run 10ns
# lshift by 2
force {KEY[0]} 1
force {SW[0]} 1
force {SW[1]} 0
force {SW[2]} 0
force {SW[3]} 0
force {SW[4]} 0
force {SW[5]} 1
force {SW[6]} 0
force {SW[7]} 1
force {SW[9]} 1
run 10ns
# lshift by 2
force {KEY[0]} 0
force {SW[0]} 1
force {SW[1]} 0
force {SW[2]} 0
force {SW[3]} 0
force {SW[4]} 0
force {SW[5]} 1
force {SW[6]} 0
force {SW[7]} 1
force {SW[9]} 1
run 10ns
# rshift by 2
force {KEY[0]} 1
force {SW[0]} 0
force {SW[1]} 1
force {SW[2]} 0
force {SW[3]} 1
force {SW[4]} 0
force {SW[5]} 0
force {SW[6]} 1
force {SW[7]} 1
force {SW[9]} 1
run 10ns
# rshift by 2
force {KEY[0]} 0
force {SW[0]} 0
force {SW[1]} 0
force {SW[2]} 1
force {SW[3]} 1
force {SW[4]} 0
force {SW[5]} 0
force {SW[6]} 1
force {SW[7]} 1
force {SW[9]} 1
run 10ns