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A basic test environment. Run `make test`, `make test_sp` and/or `make test_axi` to run
the test firmware in different hardware configurations.
+*Note: The test bench is using Icarus Verilog. However, Icarus Verilog 0.9.7
+(the latest release at the time of writing) has a few bugs that prevent the
+test bench from running. Upgrade to the latest github master of Icarus Verilog
+to run the test bench.*
+
#### firmware/
A simple test firmware. This runs the basic tests from `tests/`, some C code, tests IRQ