用51单片机编写程序实现数码管的时钟数字显示

KEYVAL EQU 30HKEYTM EQU 31HKEYSCAN EQU 32HDAT EQU 33HSCANLED EQU 39HCLK EQU 77HSEC EQU 78HMIN EQU 79HHOUR EQU 7AHPAUSE BIT 00HDOT BIT 01HORG 0000HLJMP MAINORG 000BHLJMP T0ISR ;50ms定时ORG 001BHLJMP T1ISR ;扫描显示ORG 0030HMAIN: MOV SP,#5FH MOV TMOD,#11H