Squeak/linux/iPaq display speed
Joern.Eyrich at brokat.com
Wed Feb 21 13:42:41 UTC 2001
Tim Rowledge wrote:
> John.Maloney at disney.com is widely believed to have written:
> > What's the "mini cache"? Is it built into the SA1110 chip? How
> > does one enable it?
> It's a small extra memory cache (I think for data only) that was
> provided exactly for situations like updating displays. If your software
> can use it (and I have no idea whatsoever how one would do that - offer
> me enough money and I'll work it out :-) )
I happen to have an SA-1110 manual on my disk, and it says the regular d-cache is 8KB, the mini-cache is 512byte.
You toggle the "bufferable" bit in the MMU's page table to choose which of the two to use for a given address.
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