Try the following:

knoppix acpi=off pnpbios=off -b noapic noagp noapm nodma nomce nofirewire nopcmcia noscsi noswap nousb nosmp noaudio nodhcp vga=normal 1

[I'd be nice if the above were a boot alias.]

Does the above work? If so, start removing options from left to right, until it no longer works.

If the above doesn't work, it could be that Knoppix is not correctly detecting the amount of ram you have. Try adding the argument like "mem=128M" if you have 128 MB of RAM. Adjust for your amount of RAM.

Regards,
- Robert