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This is a basic opcode test bench which tries all supported opcodes. See the

source comments. This code has been lifted whole from the Plasma project.

Build the program with:

make opcodes

or

make opcodes_sim

Read ../readme.txt for some warnings on the makefile configuration.

It will build a vhdl test bench at /vhdl/tb/mips_tb2.vhdl (overwriting) that you

can try on your VHDL simulator with script sim_tb2.do. The provided script and

the VHDL code have some dependence on Modelsim, see project readme file.

The makefile will too bouild some bionaries that you can run in the software

simulator:

    slite --bram=opcodes.bin --xram=opcodes.data

This code can't be used on real hardware (i/o is far too simple).

WARNING: the gnu assembler expands DIV* instructions, inserting code that

handles division by zero. Bear that in mind when reading the listing file.