>Hi,
>
>    This may be a little off topic, but has anybody heard of potential
>problems with some G4 upgrades and the six-slot macs (aka 9500/9600)?
>Something to do with illegal bus states and cpu cache snoop getting
>interrupted resulting in cache coherency problems?
>
>                    kevin

Many moons ago, when the G3 upgrades came out, there were problems
with MacOS because the out-of-order memory refs from the G3 could
touch the HW space.  The MacOS/ROMs that were pre-G3
 knew nothing about this and did not
set the "guard bit" on this address space, so things got flaky.

This should not be a problem with NetBSD.

-dgl-