> Another stupid question--why has secondary cache been overlooked in the
> MIPS world? My own Magnum is of the 4000PC variety--that is, no secondary
> cache; it seems counterintuitive to me for manufacturers to build a solid
> motherboard based on the MIPS architecture but then skip out on a
> relatively cheap component like cache which goes such a long way to
> increase overall system performance.
A good RAM interface is a much more effective mean to accelerate a system than
caches especially when you have an application that has a working set that
exceeds the cache size. The Magnum's RAM interface may be slow by today's
standards but it was very fast at it's time.