This sandbox is the virtualaddress space, which in 32-bit mode is always a 4gb block of memory addresses.
此沙箱是在32位模式下的虚拟地址空间，这始终是一个4gb的内存地址块。
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The problem is that this works when the CPU is in 32-bit VPAM (Virtual Protected AddressMode), which is what an i386 OS USES, but not when the CPU is in the so-called "Long Mode" that AMD introduced.