为每个分区引入了 RMO 寄存器，以便引用分区的内存空间中的逻辑零。
The RMO register is introduced for every partition to reference logical zero in the partitioned memory space.
RMO 寄存器设计用于每个分区，并且可以帮助每个分区引用地址零、以及内存中有效的且唯一的地址。
The RMO register is designed for each partition and is intended to facilitate each partition to reference address zero and yet a valid and unique address in the memory.
在这种情况下，有效地址总是分为两个32位的寄存器；高位寄存器是可选的，如果没有指定，就会被当作零进行处理。
The effective address is, under the hood, always split into a pair of 32-bit registers; the high-order register is optional and if it's not specified, it is treated as zero.
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