default or selected kernelversion does not have config value CONFIG_MSNDCLAS_IO.
Result is shown for kernelversion 6.7-rc3
MSND Classic I/O 210, 220, 230, 240, 250, 260, 290, 3E0
configname: CONFIG_MSNDCLAS_IO
Linux Kernel Configuration
└─>Device Drivers
└─>Sound card support
└─>Open Sound System (DEPRECATED)
└─>MSND Classic I/O 210, 220, 230, 240, 250, 260, 290, 3E0
In linux kernel since version 2.6.20 (release Date: 2007-02-04)
I/O port address for the MultiSound Classic and related cards.