gg502.asm

福州大学接口课程全部实验代码。包括inter的芯片8253-5、芯片8255A、芯片DAC0832、芯片ADC0809等。详细批注

;gg.asm
;for template<8086>
;2005-05
;p_Sa
data	SEGMENT
        BUF	DB	0C0H,0F9H,0A4H,0B0H,99H,92H,82H,0F8H,80H,90H,88h,83h,0c6h,0a1h,86h,09h;
        DAT DB	100h DUP(0)
        PA	EQU	280h
        PB	EQU	281h
        PC	EQU	282h
        PCTL	EQU	283h
        oOOo	EQU	2A0h
data	ENDS
stack0 SEGMENT para stack
        DW	20h	DUP(0)
stack0 ENDS
        
coseg	SEGMENT
        ASSUME CS:coseg,DS:data,SS:stack0
start:  MOV AX, data
        MOV DS, AX
;================MOV-DS-AX==============
        MOV AL, 10000000b
        MOV DX, PCTL
        OUT DX, AL
        
        MOV CX, 100h
        LEA BX, DAT
     l0:MOV DX, oOOo
        MOV AL, 0
        OUT DX, AL
        CALL delay
        IN  AL, DX
        MOV [BX], AL
        INC BX
        LOOP l0
        
        
        
        MOV DX, PA
        MOV AL, 0feh	;pc0,low
        OUT DX, AL
        
        MOV DX, PB
        MOV AL,[BX]
        AND AL, 0fh	;low
        
        LEA SI, BUF
        MOV AH, 0
        ADD SI, AX
        MOV AL, [SI]
        OUT DX, AL
        CALL delay
        
        
        
        MOV DX, PC
        MOV AL, 0fdh	;pc1,high
        OUT DX, AL
        
        MOV DX, PB
        MOV AL, [BX]
        AND AL, 0f0h	;high
        PUSH CX
        MOV CL, 4
        ROL AL, CL
        POP CX
        
        LEA SI, BUF
        MOV AH, 0
        ADD SI, AX
        MOV AL, [SI]
        OUT DX, AL
        CALL delay
        
        
        
        MOV CX, 100h
        LEA SI, DAT
     l1:MOV BL, [SI]
        CALL show
        MOV DL, ' '
        MOV AH, 2
        INT 21h
        INC SI
        LOOP l1
;================INT-21H================
        MOV AH, 4ch
        INT 21h
delay PROC
        PUSH CX
        MOV CX, 0f000h
     ys:NOP
        LOOP ys
        POP CX 
        RET     
delay ENDP
        
show PROC
        PUSH CX
        MOV CH, 2
 rotate:MOV CL, 4
        ROL BL, CL
        MOV AL, BL
        AND AL, 0fh
        ADD AL, 30h
        CMP AL, 3ah
        JB  princh
        ADD AL, 7h
 princh:MOV DL, AL
        MOV AH, 02h
        INT 21h
        DEC CH
        JNZ rotate
        POP CX 
        RET     
show ENDP
coseg	ENDS
        END	start