Specifying ramdisk/ size on startup

[fergus]

I have a Intel PC with 2G RAM. When I start Knoppix 5.1.1 from the boot DVD (started with the command
knoppix 1
to have a non-X environment) I find that almost all 2G is dedicated to ramdisk/. This leaves me almost no brainpower for actual *work*. I do not need that much /ramdisk, but I do need a lot of thinking room. Please can you tell me how to specify a startup environment (eg, I dunno,
knoppix 1 ramdisk=4M
or similar) which would allow me to configure a much smaller ramdisk/, leaving much more RAM available to work with?
Specifically, I'm comparing two filesystems
diff -rq /mnt/1 /mnt/2
and at the moment even an overnight session os not long enough. Using Fedora this command completes in about 60 minutes.
Thank you for any help.
Fergus

[SiKing]

Have you tried the mem cheatcode? How about the tohd cheatcode? One of these might get you what you're looking for.