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BL2 on a Toshiba Satellite 420CDT, 100MHz, 24MB RAM.
Custom 2.2.16 kernel with sound support as modules.

Chips and Technology video works at 800x600 with X_SVGA.
svgalib works with the default drive (with libvga.config set to chipset 
VGA - it works in full color, otherwise won't display jpegs).

Audio chip is said to be ESS688, which is fully sb compatible.
It appears to be ISA not PCI, since after I
insmod soundcore
insmod soundlow (2.2.16 kernel)
insmod sound
insmod uart401
insmod opl3 io=0x388 [for FM synthesis of midi sounds]
insmod sb

I am told io irq and dma are obligatory  (ISA not PCI sound chip)
Web research suggests irq 10.

insmod sb io=0x220 irq=10 dma=1

sb:  dsp reset failed
sb: init_module:  sb: Device or resource busy.

This suggests I have the wrong module (not an sb-compatible).
(One BL newbie reported these same error messages to linuxquestions and 
turned out to have a non-sb sound chip onboard).

What else might I try?  I could make a Smart Boot Manager floppy boot disk 
and try to boot DSL from CD (non-graphical, type DSL 2 at Boot: 
prompt) and see if it will identify the chip, but someone else reported 
that DSL does not work with a similar Toshiba model.  Several websites 
say this model has ESS688 which is sb.

I could try a Slackware bare.i kernel (or is there a specific sound 
kernel?).

I also have a DELL with ESS1688 sound that supposedly is also sb.

Sindi Keesan