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来自「RM51单片机实验板配套实验例程库」· 代码 · 共 20 行

;-------------------------------------
;延时100机器周期*参数（1~65535）
;-------------------------------------
                    NAME     DELAY
?PR?_DELAY?DELAY    SEGMENT  CODE
                    PUBLIC   _DELAY
                    RSEG     ?PR?_DELAY?DELAY
_DELAY:             PUSH     ACC               ;2
		    MOV      A,     R7         ;1
                    JZ       DELA1             ;2
	            INC      R6                ;1
DELA1:              MOV      R5,    #50D       ;2
                    DJNZ     R5,    $          ;2
                    DJNZ     R7,    DELA1      ;2
                    DJNZ     R6,    DELA1      ;2
                    POP      ACC               ;2
                    RET                        ;2
;
                    END