A verilog implementation of variants of the SN76489 programmable sound generator. It aims to provide a parameterized module which can closely replicate the behaviour of all the variants by providing options for things like: tapped bits, shift register size, etc...

Copyright: René Richard 2018

OPSG is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

OPSG is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with OPSG. If not, see https://www.gnu.org/licenses/.

Join the development talk on our discord server at https://t.co/b1SaVcVk48.

Run the test benches with iverilog using the following commands:

iverilog [testbench.v] [design.v] -o wave.out

Then, use vvp to convert the 'test.out' file into a format .bcd which gtkwave can view:

vvp wave.out

You could obviously run the above in one line if you're fancy:

iverilog [testbench.v] [design.v] -o wave.out & vvp wave.out

Finally, open the waveform using gtkwave:

gtkwave dump.bcd