说明: 计算机组成原理9 VHDL实现 头文件cpu_defs.vhd如下: LIBRARY IEEE; USE IEEE.STD_LOGIC_1164.ALL; PACKAGE cpu_defs IS TYPE opcode IS (sta, add, sub, and1, jmp, nop); CONSTANT word_w: NATURAL :=8;--常量 CONSTANT op_w: NATURAL :=3; CONSTANT rfill: STD_LOGIC_VECTOR(op_w-1 d
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