Hello,
finally i get it!
you have to make the approcriate l2cr entry in the "more kernel arguments" field of
the BootX controlfield under MacOS9 like:
lcr=0xb9080000
(ATTENTION: it's the value of MY card, you have to make the appropriate l2cr entry of your card in this field: to find out the value for your card, take e.g the Powerlogix CPU Director 1.5f6 Programm (under Macos9) and take the appropriate value out of the l2 field!! ... then entry the value in the textfield "more kernel arguments" field of BootX)
To check if your l2-cache is enabled under linux open a shell from the Terminal and do
the following command:
cat /proc/sys/kernel/l2cr
the message must be something like this:
0xb9080000: L2 enabled, no parity, 1MB, +2 clock, pipelined burst SRAM, write-through, 0.5ns hold
if you have no sucess the message is something like this
:0x00000000: L2 disabled, no parity, 2MB, c
lock disabled, flow-through burst SRA M, copy-back, 0.5ns hold
... sorry for my english