On Mar 9, 2006, at 12:28 PM, Yang Huang wrote:
Hi list,
In previous mail discussing how to disable the CPU cache, I got
another question, which I guess it would be better to make a new
thread.
I search for a while, but without satisfied answer. As for CR0, the
Machine State Word Register, almost all documents give the following
info:
|31|30-5|4|3|2|1|0| Machine Status Word
| | | | | | +---- Protection Enable (PE)
| | | | | +----- Math Present (MP)
| | | | +------ Emulation (EM)
| | | +------- Task Switched (TS)
| | +-------- Extension Type (ET)
| +---------- Reserved
+------------- Paging (PG)
Read your processor datasheet for more info.
On Pentium IV there are 5 bits you can set: 30 (CD-cache disable)
29(NW-Not Write Through) 18(AM-Align-Mask) 16(WP) (Write-Protected)
5(NP-Numeric Error)
Other bits between 5 and 30 are reserved.
-----------
Oldani (sgrakkyu) Massimiliano
Antifork Research, Inc.
Metro Olografix
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