基于单片机的密码锁的设计下载

code_seg segment code
data_seg segment data
stack_seg segment idata
spk bit p1.3
rseg data_seg
frq:ds 1
tmp:ds 1
rseg stack_seg
stack:ds 20
cseg at 00000h
ljmp main
cseg at 0003h
ljmp zd
rseg code_seg
jmp main
PORTA EQU 8FFFH ;8255A口地址
PORTB EQU 9FFFH ;8255B口地址
PORTC EQU 0AFFFH ;
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