AMD64 vs i386 for FreeBSD

Doug White dwhite at
Wed Jun 30 18:43:18 PDT 2004

Don't crosspost -questions and other lists. Stripping questions cc:.

On Tue, 29 Jun 2004, Remi wrote:

> Just to clarify exactly what you mean. I can the x86 version of BSD with no
> changes to the BIOS, jumpers or anything on an AMD64?

No hardware changes necessary. The OS has to write to a CPU register to
enable AMD64 native ("Long") mode; without the write, it acts just like
any other i386 CPU.

Doug White                    |  FreeBSD: The Power to Serve
dwhite at          |

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