rjds.asm

汇编语言开发的各种实用程序

                 ORG   0000H
				 LJMP  START
				 ORG   000BH
				 LJMP  INT0X
				 ORG   0030H
START:           
T1S              EQU   30H
T2S              EQU   31H
                 MOV   TMOD,#01H
				 MOV   TH0,#(65536-50000)/256
				 MOV   TL0,#(65536-50000) MOD 256
				 MOV   T1S,#00H
				 MOV   T2S,#00H
				 SETB  EA
				 SETB  ET0
				 SETB  TR0
				 SJMP  $
INT0X:           PUSH  ACC
                 PUSH  PSW
				 INC   T1S
				 MOV   A,T1S
				 CJNE  A,#20,NEXT
				 CPL   P1.0
				 MOV   T1S,#00H
NEXT:			 INC   T2S
				 MOV   A,T2S
    			 CJNE  A,#40H,NEXT1
				 CPL   P1.1
				 MOV   T2S,#00H
NEXT1:           MOV   TH0,#(65536-50000)/256
				 MOV   TL0,#(65536-50000) MOD 256
				 POP   PSW
				 POP   ACC
				 RETI
				 
				 
				 END