By talking to others about the issues i decided to create a bunch of versions of my mapper. One issue of the Everdrive menu is the volume setting that currently only allows to be set to HI or LO.
As the mixing circuit is pretty analog and there seems to be differences between the various versions of the Famicom / NES a higher range of volume settings is required.
Please load the zip file here.
You get multiple files that are named with the following scheme:
numbers represent the total output volume in percent. 100% is the
maximum the FPGA can drive and offers the best signal to noise ratio.
This way you can alternate the volume by swapping the mapper or maybe check two different ones without swapping. The mapper is now configurable and has support for HI and LO.
Replace the original 024.RBF with the one you'd like.
Here is a diagramm of possible combinations.
If you need additional volume configurations just contact me.
The mapper is based on a mod of the original mapper and was tested for hours of gameplay on a modified US NES. As I can not be aware of everything you use this software on your own risk. If you damage your NES or you Everdrive using it don't make me responsible for it.