Thanks for all replies! Ron, I also flunked :-). I think i should read Intel manual again and again,
On 10/27/06, ron minnich rminnich@gmail.com wrote:
On 10/26/06, Tom Sylla tsylla@gmail.com wrote:
Please refer to Chapter 10 "Memory Cache Control" in the Intel manual you mentioned. Find the Table called "Cache Operating Modes" (Table 10-5 in current version). The way it works is described well in that table. For CD=1, "Read hits access the cache; read misses do not cause replacement." and "Write hits update the cache". So that means anything that is a "hit" acts just like RAM. Nothing too fancy. You just have to make sure that the area you want to "hit" gets pre-loaded before you turn the cache back off again.
Thanks tom! this is the 'can you read carefully' test that I flunked. It is obvious once you read it, except I missed it for 5 years :-) Once Eswar pointed it out it was obvious.
ron