Generate Up Going Staircase wave form ALP

Program Name

Write a Assembly Language Program for Generate Up Going Staircase wave form .

Theory

Instruction Mnemonic	Operand	Comments
MVI	A,80	Load accumulator with 80H to configure CWR.
OUT	CWR	Configure CWR to display output with accumulator value.
MVI	A,00	Initialize accumulator with 00 to display up-going staircase from the bottom of the CRO screen.
OUT	PA	Send the value 00H through output port A.
OUT	PB	Send the value 00H through output port B.
CALL	DELAY	Call delay function to continue the wave.
ADI	33	Add 33H to the current accumulator value to print next staircase.
CPI	FF	Compare the incremented value of accumulator with FF to check whether it has reached maximum value or not.
JNZ	XX	If the accumulator value has not reached maximum jump back to send value to output port.

Delay Code

Instruction Mnemonic	Operand	Comments
MVI	B,FF	Initialize register B with FF
DCR	B	Decrement the value of B.
JNZ	BACK	If the value does not become 00H then continue decrementing value to register B.
RET		Return back to main routine.

Program Code


MVI	A,80
OUT	CWR
MVI	A,00
OUT	PA
OUT	PB
CALL	DELAY
ADI	33
CPI	FF
JNZ	XX
JMP	YY

//Delay Code
MVI	B,FF
DCR	B
JNZ	BACK
RET

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