http://www.cck.uni-kl.de/misc/tecra710

Toshiba Tecra 750CDT
CPU: Pentium 233MMX "Tillamook" 1.8V Core
Graphics: S3 ViRGE/MX 3D
Sound: Yamaha 3D "The Crystal Semiconductor CS4232 chipset also includes a Yamaha OPL-3 (YMF262) and a Yamaha D/A converter (YAC512), full duplex"
PCMCIA: Intel 82365 compatible type II with CardBus and ZV support
InfraRed: IrDA 1.1

Tecra 750CDT: Yamaha chipset
After changing the sound IRQ in the BIOS from 5 to 7, the following list of settings is reported to work. (Thanks to Carlos Puchol.)
Setting 	BIOS setting
CONFIG_SOUND=y
CONFIG_ADLIB=y
CONFIG_MPU401=y
CONFIG_MSS=y
CONFIG_YM3812=y
MPU_BASE=330 	Please report which BIOS settings change these values
MPU_IRQ=9
MSS_BASE=530
MSS_IRQ=7
MSS_DMA=1
MSS_DMA2=0
Harald Koenig suggests defining the CONFIG_AUDIO, CONFIG_MIDI, CONFIG_AD1848, and CONFIG_SEQUENCER options as well. SELECTED_SOUND_OPTIONS should be 0x00a80214. Double-check the IRQ and DMA settings with your BIOS.

Jeffrey R. Lewis and Richard Breitner report that the OSS Linux drivers (version 3.1.9d required) support the OPL3-SAx chipset in the 750DVD