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apt-get install libnss3:i386 libgtk2.0-0:i386 libcurl3:i386
Award 430VX PCI Pentium 150 256 MB RAM S3 ViRGE/DX Sound Blaster PCI 128 C1800 H16 S32 hard disk (450 MiB) Microsoft 2-button serial mouse Realtek RTL8029AS network card
The description for the alsa-config.tcz extension says that it may be necessary for legacy hardware, but I still get that error message during boot after installing it. Older cards, such as AdLib and Sound Blaster 16, don't seem to be detected at all. To check if something may be wrong with the ALSA installation, I converted the hard disk image to VMDK format using this program called qemu-img.exe. Then I made a VMware VM and used that file as the hard disk. It was able to detect my computer's sound card without problems, and sound worked after I created the .asoundrc file as described here. Note that the default volume might be 0, which I fixed with the command
snd_ens1371 0000:00:13.0: AC'97 0 access is not valid [0x0], removing mixer.
So I suspect that the sound cards emulated by PCem are too old to use with TinyCore v9.0. An older version that doesn't have missing dependencies for OSS might work. EDIT: OK, so I've confirmed that sound works via OSS. Had to go back to TinyCore 7.0. The 8.x versions ran into some kernel panic when booting from the ISO, so I didn't even get them installed. Unfortunately, abobo crashes at the title screen with an "illegal instruction" error. EDIT2: Additional testing suggests that the illegal instruction is a FP problem. You can get past it by mashing A at the title screen.
amixer set Master 100