sijyisjyijsya 發問時間: 科學工程學 · 9 年前

請說明六個常用的Flag Register之意義?

請說明六個常用的Flag Register之意義?

請說明六個常用的Flag Register之意義?

請說明六個常用的Flag Register之意義?

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釋大懺 大大

請問可以翻成中文嗎?

我看不太懂英文!!!

常用的六個是哪六個= =?

1 個解答

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  • 9 年前
    最佳解答

    http://tw.knowledge.yahoo.com/question/question?qi...

    The Program status word (PSW)

    Symbol Function CYCarry flagACAuxiliary Carry flag (For BCD Operations)F0Flag 0 (Available to the user for General Purpose)RS1,

    RS0Register bank select:

    RS1 RS0 Working Register Bank and Address

    0 0 Bank0 (D:0x00 - D:0x07)

    0 1 Bank1 (D:0x08 - D:0x0F)

    1 0 Bank2 (D:0x10 - D:0x17)

    1 1 Bank3 (D:0x18H - D:0x1F)0VOverflow flagUDUser definable flagPParity flag—Reserved for future use (251 Only)ZZero flag (251 Only)NNegative flag (251 Only)http://www.keil.com/support/man/docs/is51/is51_ov_...

    2012-03-27 11:59:30 補充:

    0V Overflow flag 溢位

    P Parity flag 奇偶數

    AC Auxiliary Carry flag (For BCD Operations) 輔助溢位旗標

    Z Zero flag (251 Only) 零旗標

    N Negative flag (251 Only) 負旗標

    UD User definable flag 自訂旗標

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