Newsgroups: comp.arch Path: utzoo!henry From: henry@zoo.toronto.edu (Henry Spencer) Subject: Re: more cache/uncached ld/st Message-ID: <1991Apr24.173843.13659@zoo.toronto.edu> Date: Wed, 24 Apr 1991 17:38:43 GMT References: <1991Apr15.193425.3436@waikato.ac.nz> <1991Apr23.053619.13474@kithrup.COM> <1991Apr23.152155.2298@zoo.toronto.edu> <51903@apple.Apple.COM> Organization: U of Toronto Zoology In article <51903@apple.Apple.COM> baum@apple.com (Allen Baum) writes: >> Anybody who caches a frame buffer is crazy... > >Not so. If you can use the burst transfer into the cache, and throw away the >line (i.e. burst dump it) when finished, its a very large win... If you can't use burst transfers except by trampling on your cache, your processor-memory interface is defective. (More precisely, it has been optimized for the typical case without due consideration of important atypical cases.) Of course, if you're using your cache as a substitute for having an adequate number of registers in your CPU, then you may not have a choice... -- And the bean-counter replied, | Henry Spencer @ U of Toronto Zoology "beans are more important". | henry@zoo.toronto.edu utzoo!henry