8259中断程序代码

1、程序1 IO8259_0 EQU 0F000H IO8259_1 EQU 0F001H _STACK SEGMENT STACK DW 100 DUP(?) _STACK ENDS _DATA SEGMENT WORD PUBLICDATA _DATA ENDS CODE SEGMENT ASSUME CS:CODE,DS:_DATA,SS:_STACK START: MOV AX,_DATA MOV DS,AX MOV ES,AX NOP CALL Init8259 CALL WriIntver MOV CX,0000H A1: CMP CX,000AH JNZ A2 CLI A3:JMP

2、$ A2:STI JMP A1 Init8259 PROC NEAR MOV DX,IO8259_0 MOV AL,13H OUT DX,AL MOV DX,IO8259_1 MOV AL,08H OUT DX,AL MOV AL,09H OUT DX,AL MOV AL,0FEH OUT DX,AL RET Init8259 ENDP WriIntver PROC NEAR PUSH ES MOV AX,0 MOV ES,AX MOV DI,02H LEA AX,INT_0 MOV ES:DI,AX ADD DI,2 MOV ES:DI,AX POP ES RET WriIntver END

3、P INT_0: INC CX MOV DX,IO8259_0 MOV AL,20H OUT DX,AL IRET CODE ENDS END START 程序2 IO8259_0 EQU 0F000H IO8259_1 EQU 0F001H _STACK SEGMENT STACK DW 100 (?) _STACK ENDS _DATA SEGMENT WORD PUBLICDATA _DATA ENDS CODE SEGMENT ASSUME CS:CODE,DS:_DATA,SS:_STACK START: MOV AX,_DATA MOV DS,AX MOV ES,AX NOP CA

4、LL Init8259 CALL WriIntver MOV SI,3000H MOV DI,6000H A1: STI JMP A1 Init8259 PROC NEAR MOV DX,IO8259_0 MOV AL,13H OUT DX,AL MOV DX,IO8259_1 MOV AL,08H OUT DX,AL MOV AL,09H OUT DX,AL MOV AL,7EH OUT DX,AL RET Init8259 ENDP WriIntver PROC NEAR PUSH ES MOV AX,0 MOV ES,AX MOV DI,20H LEA AX,INT_0 MOV ES:DI,AX ADD DI,2 MOV AX,CS MOV ES:DI,AX MOV DI,3CH LEA AX,INT_7 MOV ES:DI,AX ADD DI,2 MOV AX,CS MOV ES:DI,AX POP ES RET WriIntver ENDP INT_0: MOV AX,02H MOV SI,AX STI MOV AX,01H MOV SI,AX MOV DX,IO8259_0 MOV AL,20H OUT DX,AL IRET INT_7: MOV AX,02H MOV DI,AX STI MOV A