1.FIFO_ RD復(fù)制表的頂部存儲(chǔ)單元的值到輸出參數(shù)Q中。然后必須有另外的邏輯程序輸入數(shù)據(jù)到輸入存儲(chǔ)單元中。2.表中剩余的項(xiàng)復(fù)制到表中更低的位置。3.FIFO_ _RD將指針減1.4.FIFO_ RD執(zhí)行時(shí)，步驟1，2和3重復(fù)執(zhí)行，直到表為空(PTR=0)。當(dāng)表滿時(shí)指針首尾不重合。

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