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# A very simple modelsim do file #
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# 1) Create a library for working in
vlib work

# 2) Compile the half adder
vcom -93 -explicit -work work HalfAdder.vhd

# 3) Load it for simulation
vsim HalfAdder

# 4) Open some selected windows for viewing
view structure
view signals
view wave

# 5) Show some of the signals in the wave window
add wave -noupdate -divider -height 32 Inputs
add wave -noupdate a
add wave -noupdate b
add wave -noupdate -divider -height 32 Outputs
add wave -noupdate s
add wave -noupdate c

# 6) Set some test patterns

# a = 0, b = 0 at 0 ns
force a 0 0
force b 0 0

# a = 1, b = 0 at 10 ns
force a 1 10

# a = 0, b = 1 at 20 ns
force a 0 20
force b 1 20

# a = 1, b = 1 at 30 ns
force a 1 30

# 7) Run the simulation for 40 ns
run 40