What surprised me was that this entire walk is fully hardware-driven -- no microcode involvement at all. The state machine reads the page directory entry, reads the page table entry, checks permissions, and writes back the Accessed and Dirty bits, all autonomously. Since it's hardware-driven, it runs in parallel with the microcode and needs its own memory bus arbitration -- the paging unit must share the bus with both data accesses from the microcode and prefetch requests from the instruction queue.
Continue reading...。业内人士推荐同城约会作为进阶阅读
专麦、专储、专加工，已成为小麦食用领域的一大趋势。国家小麦产业技术体系加工研究室主任、河南工业大学粮油食品学院教授郑学玲说，由于面包、面条、馒头、饼干等不同种类面制品对小麦粉的品质需求不同，小麦粉产品的分类越来越精细。市场上，专用粉比例已经占据小麦粉总量的三成，且呈现出增长态势。，更多细节参见雷电模拟器官方版本下载
• “Archaeologists Say They’ve Identified Traces of a 2,000-Year-Old Love Note Still Etched Into a Wall in Ancient Pompeii.” (Smithsonian).