The sound card, which is called ESS ES1868, is compatible with SoundBlaster.
I configured the kernel for sound as follows:
Sound card support: modular
Sound Blaster support
/dev/dsp and /dev/audio support
I/O base = 220
Sound Blaster IRQ = 5
Sound Blaster DMA = 1
Sound Blaster 16 bit DMA = 5
MPU 401 I/O base = 0
SB MPU401 IRQ = -1
Audio DMA buffer size = 65536
Your mileage may vary if you don't have the exact same model as mine, but
these worked for me.
Thanks to Timothy Lotz
of University of Maryland Baltimore County for helpful suggestions.