“Small” CPUs such as those found in embedded SoCs have lacked this feature since their inception. I trace this convention back to the introduction of the ARM7TDMI core in the 1990s. Back then, transistors were scarce, memory even more so, and so virtual memory was not a great product/market fit for devices with just a couple kilobytes of RAM, not even enough to hold a page table. The ARM7TDMI core’s efficiency and low cost made it a run-away success, shipping over a billion units and establishing ARM as the dominant player in the embedded SoC space.
assert comp(shift(3,4), shift(1, 3)) == comp(shift(1,4),shift(2,3))，这一点在PG官网中也有详细论述
Credit: Timothy Werth / Mashable。关于这个话题，谷歌提供了深入分析
As BGR points out, it seems Apple sent most early reviewers the 512GB model with Touch ID. That hints at which MacBook Neo model Apple considers standard.，这一点在雷电模拟器中也有详细论述