1. Microprocessor Lab CSL1543 0:0:2
Week 10 : DAC Interfacing

2. 1. WRITE AND EXECUTE AN ASSEMBLY LANGUAGE PROGRAM TO GENERATE THE SQUARE WAVEFORM USING A DAC INTERFACE.
Department of CSE, MSRIT

3. SQUARE WAVE .MODEL SMALL .STACK 100 .DATA .CODE DELAY PROC NEAR
MOV BX, 0FFFH
L1: MOV SI, 02FFFH
L2: DEC SI
JNZ L2
DEC DX
JNZ L1
RET
DELAY ENDP
Department of CSE, MSRIT

4. .MODEL SMALL .STACK 100 .DATA .CODE DELAY PROC NEAR DELAY ENDP
START: MOV MOV DS, AX MOV AL, 80H MOV DX, 24A3H OUT DX, AL SQUARE: MOV AL, 00H MOV DX, 24A0H CALL DELAY MOV AL, 0FFH MOV AH, 06h MOV DL, 0FFh INT 21h JNZ LAST JMP SQUARE ;INT 03H LAST: MOV AH,04Ch END START
.MODEL SMALL
.STACK 100
.DATA
.CODE
DELAY PROC NEAR
MOV BX, 0FFFH
L1: MOV SI, 02FFFH
L2: DEC SI
JNZ L2
DEC DX
JNZ L1
RET
DELAY ENDP
Department of CSE, MSRIT

5. 2. WRITE AND EXECUTE AN ASSEMBLY LANGUAGE PROGRAM TO GENERATE THE TRIANGULAR WAVEFORM USING A DAC INTERFACE.
Department of CSE, MSRIT

6. MOV AH, 06h MOV DL, 0FFh INT 21h JNZ LAST JMP L1 INT 03H
.MODEL SMALL .STACK 100 .DATA .CODE START: MOV MOV DS, AX MOV AL, 80H MOV DX, 24A3H OUT DX, AL L1: MOV AL, 00H UP: MOV DX, 24A0H INC AL CMP AL, 0FFH JNE UP MOV AL, 0FFH DOWN: MOV DX, 24A0H DEC AL CMP AL, 00H JNE DOWN
MOV AH, 06h
MOV DL, 0FFh
INT 21h
JNZ LAST
JMP L1
INT 03H
LAST: MOV AH,04Ch
END START
Department of CSE, MSRIT

7. 3. WRITE AND EXECUTE AN ASSEMBLY LANGUAGE PROGRAM TO GENERATE THE RAMP WAVE (UP) USING THE DAC INTERFACE.
Department of CSE, MSRIT

8. MODEL SMALL .STACK 20 .DATA .CODE START: MOV MOV DS, AX MOV AL, 80H MOV DX, 24A3H OUT DX, AL L1: MOV AL, 00H UP: MOV DX, 24A0H INC AL CMP AL, 0FFH JNE UP MOV AH, 06h MOV DL, 0FFh INT 21h JNZ LAST JMP L1 LAST: MOV AH, 04ch ; INT 03H END START
Department of CSE, MSRIT

9. 4. WRITE A PROGRAM TO INTERFACE A DAC TO GENERATE A RAMP WAVE FORM (DOWN).
Department of CSE, MSRIT

10. .MODEL SMALL .STACK 100 .DATA .CODE START: MOV MOV DS, AX MOV AL, 80H MOV DX, 24A3H OUT DX, AL L1: MOV AL, 0FFH UP: MOV DX, 24A0H DEC AL CMP AL, 00H JNE UP MOV AH, 06h MOV DL, 0FFh INT 21h JNZ LAST JMP L1 INT 03H LAST: MOV AH, 04ch END START
Department of CSE, MSRIT