这是一个9999位数倒计时，为了方便延时，定时时间稍长。 LD1 BIT P2.7 LD2 BIT P2.6 LD3 BIT P2.5 LD4 BIT P2.4 LED1 BIT P2.3 LED2 BIT P2.2 LED3 BIT P2.1 LED4 BIT P2.0 BEEP BIT P3.6 SUB BIT 01H 减位标志位 BUF_LED1 EQU 24H

倒计时演示1.ASM
倒计时演示1.BIN
倒计时演示1.HEX
UNTITLED.DSK

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