取程序微指令, 完成

assembly.py

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+import pin
+
+
+FETCH = [
+    # 把 pc(当前是0) 的值 输出到偏移地址寄存器中,
+    pin.PC_OUT | pin.MAR_IN,
+    # 内存根据上方修改后的偏移地址寄存器找到数据输出到总线上, IR 写入, 给PC 增加1
+    pin.RAM_OUT | pin.IR_IN | pin.PC_INC,
+    pin.PC_OUT | pin.MAR_IN,
+    pin.RAM_OUT | pin.DST_IN | pin.PC_INC,
+    pin.PC_OUT | pin.MAR_IN,
+    pin.RAM_OUT | pin.SRC_IN | pin.PC_INC,
+]
+
+
+if __name__ == "__main__":
+    print(FETCH)

compile.py

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+
+from assembly import FETCH
+import pin
+
+META_DATA = "v3.0 hex words addressed\n"
+
+def chunk(l, n):
+    for i in range(0, len(l), n):
+        yield l[i:i + n]
+
+def get_hex_str(codes, width):
+    width = int(width)
+    data = []
+    for _code in codes:
+        hex_str = hex(_code)[2:]
+        zero_str = ""
+        for _ in range(width - len(hex_str)):
+            zero_str += "0"
+        data.append(zero_str + hex_str)
+    return data
+
+
+def save_hex_str(hex_str_lis, chunk_count: int):
+    lines = []
+    for line in chunk(hex_str_lis, chunk_count):
+        print(line)
+
+if __name__ == "__main__":
+    data_width = 32
+    addr_width = 16
+
+    # 我们现在只支持16个指令
+    code_hex_str = get_hex_str(FETCH, data_width / 4)
+    base_bin_data = get_hex_str([pin.HLT for _ in range(1 << addr_width)], data_width / 4)
+    for addr in range(1 << addr_width):
+        ir = addr >> 8
+        psw = (addr >> 4) & 0xf
+        cyc = addr & 0xf
+        if cyc < len(code_hex_str):
+            base_bin_data[addr] = code_hex_str[cyc]
+
+    # 写入数据到 bin文件
+    addr_chunk = int(64 / (32 / 4))  # bin文件每行有多少个数据
+    lines = [META_DATA, ]
+    idx = 0
+    for slice in chunk(base_bin_data, addr_chunk):
+        hex_idx_str = hex(idx)[2:]
+        zero_str = ""
+        for _ in range(4 - len(hex_idx_str)):
+            zero_str += "0"
+        hex_idx_str = zero_str + hex_idx_str
+        line = f"{hex_idx_str}:"
+
+        for _ in slice:
+            line += f" {_}"
+        line += "\n"
+        lines.append(line)
+
+        idx += addr_chunk  # 下一行的地址
+    with open("./ROM.bin", "w") as f:
+        f.writelines(lines)
+
+
+

pin.py

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+
+
+
+MSR = 1
+MAR = 2
+MDR = 3
+RAM = 4
+IR = 5
+DST = 6
+SRC = 7
+A = 8
+B = 9
+C = 10
+D = 11
+DI = 12
+SI = 13
+SP = 14
+BP = 15
+CS = 16
+DS = 17
+SS = 18
+ES = 19
+VEC = 20
+T1 = 21
+T2 = 22
+
+MSR_OUT = MSR
+MAR_OUT = MAR
+MDR_OUT = MDR
+RAM_OUT = RAM
+IR_OUT = IR
+DST_OUT = DST
+SRC_OUT = SRC
+A_OUT = A
+B_OUT = B
+C_OUT = C
+D_OUT = D
+DI_OUT = DI
+SI_OUT = SI
+SP_OUT = SP
+BP_OUT = BP
+CS_OUT = CS
+DS_OUT = DS
+SS_OUT = SS
+ES_OUT = ES
+VEC_OUT = VEC
+T1_OUT = T1
+T2_OUT = T2
+
+
+_DST_SHIFT = 5
+
+
+MSR_IN = MSR << _DST_SHIFT
+MAR_IN = MAR << _DST_SHIFT
+MDR_IN = MDR << _DST_SHIFT
+RAM_IN = RAM << _DST_SHIFT
+IR_IN = IR << _DST_SHIFT
+DST_IN = DST << _DST_SHIFT
+SRC_IN = SRC << _DST_SHIFT
+A_IN = A << _DST_SHIFT
+B_IN = B << _DST_SHIFT
+C_IN = C << _DST_SHIFT
+D_IN = D << _DST_SHIFT
+DI_IN = DI << _DST_SHIFT
+SI_IN = SI << _DST_SHIFT
+SP_IN = SP << _DST_SHIFT
+BP_IN = BP << _DST_SHIFT
+CS_IN = CS << _DST_SHIFT
+DS_IN = DS << _DST_SHIFT
+SS_IN = SS << _DST_SHIFT
+ES_IN = ES << _DST_SHIFT
+VEC_IN = VEC << _DST_SHIFT
+T1_IN = T1 << _DST_SHIFT
+T2_IN = T2 << _DST_SHIFT
+
+
+SRC_R = 2 ** 10
+SRC_W = 2 ** 11
+DST_R = 2 ** 12
+DST_W = 2 ** 13
+
+PC_WE = 2 ** 14
+PC_CS = 2 ** 15
+PC_EN = 2 ** 16
+
+
+PC_OUT = PC_CS
+PC_IN = PC_CS | PC_WE
+PC_INC = PC_CS | PC_WE | PC_EN
+
+HLT = 2 ** 31