Hi,
the manual way of enabling/disabling overlays is checking their availability in /boot/dtb/<family>/overlay and edit /boot/armbianEnv.txt.
In your case it seems that a new overlays needs to be written. You can decompile an existing one that is similar using the
code {
font-family: Consolas,"courier new";
color: crimson;
background-color: rgba(0, 0, 0, 0.2);
padding: 2px;
font-size: 105%;
}
dtc utility.
Once you created a new dts file you can use
code {
font-family: Consolas,"courier new";
color: crimson;
background-color: rgba(0, 0, 0, 0.2);
padding: 2px;
font-size: 105%;
}
armbian-add-overlay <filename>.dts to compile and enable it.
What exact values are necessary to achieve your particular case I don't know. I guess for that you have to dig through the datasheets of both your board and the SoC it is built around.