On Wed, 2006-02-08 at 10:53 -0800, Daniel Gimpelevich wrote: > On Wed, 08 Feb 2006 17:32:48 +0100, Tobias Netzel wrote: > > > As far as I know there is not yet a way the Crescendo can be made to > > work in Linux. > > Also, knowing the right L2CR won't help since the kernel does not use > > the G3 CPU and so cannot set it's L2 cache. > > In order to solve this problem the bootloader is the point that has to > > be patched as the kernel obviously is started with the 601 CPU active. > > The bootloader seems to reactivate the 601 (or somehow deactivate the > > G3) before jumping into the kernel code. > > One needs to find out at which point that happens and then find a > > workaround. > > > > @Daniel: > > As you are the expert in terms of miboot - what's your opinion? > > These facts are not limited to NuBus machines. The same problem occurs in > any Mac with a stock CPU that cannot be removed, where the upgrade > involves adding a card rather than replacing the existing CPU, and AFAIK, > the problem occurs with any bootloader. Choosing a CPU from among more > than one available is the Linux kernel's job, and evidently the support is > not there for such upgrades as Level 2 Cache Card-based ones for PCI > machines (e.g., the Crescendo/L2), PCI Card-based ones (e.g. the > Crescendo/7200), PDS Card-based ones (e.g. the Crescendo/NuBus), nor > PDS/Cache card-based ones (e.g. the Turbo601). > > The MaxPowr G3 PDS cards from NewerTech work just fine with the current kernel in the 6100, 7100 and 8100. I have one in each. However you are correct that the Crescendo/Nubus I have doesn't get recognized in any of the boxes when running Linux.
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