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9、存贮指今微程序的一般化由前面章节了解了STB指令的微程序和存贮器保护。现在我们根据这种了解试(?)STB指令的微程序(图8—6)按下述方针加以一般化。为了不仅对于STB指令能用B寄存器来作存贮,而且对于STA指令也能用A寄存器来作存贮,故使用微指令CAB。为了能够使存贮的地址不仅以主存贮器为对象,而且能以0地址(A寄存器)和1地址(B寄存器)为对象,使用微指令AAB。为了能实现存贮器保护的检验,使用图8—14的分组译码器所示微指令。根据以上要求经一般化了的存贮指令的微程序示于图9—1,该图的Sk组的“UNC”是UNCONDITIONAL之略,即无条件地跳过下一条微指令。
9, storage refers to the generalization of micro-program Micro-program and memory protection STB instructions from the previous chapter. Now we are generalized according to the following guidelines based on this micro program (see Figure 8-6) that understands the trial (?) STB instruction. In order not only for the STB instruction B register can be used for storage, but also for the STA instruction can also be used A register for storage, so the use of micro-instruction CAB. The microinstruction AAB can be used for the purpose of enabling not only main memory but also 0 address (A register) and 1 address (B register) to be stored. To verify memory protection, use the microinstructions shown in the packet decoder of Figure 8-14. The microprogram of stored generalized instructions according to the above requirements is shown in Figure 9-1. The “UNC” of the Sk group in this figure is the abbreviation of UNCONDITIONAL, which unconditionally skips the next microinstruction.