These are some custom kernel configurations that I put together for FreeBSD.
First, make sure to back up the working kernel.
Build the kernel using the make buildkernel command with KERNCONF=<ident>:
# cd /usr/src
# make KERNCOF=ASUS_CHROMEBOX_CN62 buildkernel
...
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>>> Kernel build for ASUS_CHROMEBOX_CN62 completed on Sun Feb 26 21:04:14 EST 2023
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Install the kernel using the make installkernel command with KERNCONF=<ident>:
# cd /usr/src
# make KERNCONF=ASUS_CHROMEBOX_CN62 KODIR=/boot/kernel.ASUS_CHROMEBOX_CN62 installkernel
...
--------------------------------------------------------------
>>> Installing kernel ASUS_CHROMEBOX_CN62 completed on Sun Feb 26 21:36:25 EST 2023
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Reboot. If there are problems, boot FreeBSD with your backup kernel, and troubleshoot.