On Apr 28, 2008, at 11:21 AM, Alan Cox wrote:
For later systems it gets even more complicated as the AMD boxes have an IOMMU so 32bit devices can hit all of memory (but as the IOMMU window in most cases is itself above 0x80000000 31bit devices cannot use the IOMMU window).
Gosh, I can't think of any OTHER systems which have had to do weird contortions to get from 24-to-31/2-to-64-bit addressing. Now, if you'll excuse me, I have to go find a TCP/IP stack for my 68030 Mac LC 550. Adam ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
