Generate downgoing sawtooth ALP

Program Name

Write a Assembly Language Program for Generate downgoing sawtooth .

Theory

Instruction Mnemonic	Operand	Comments
MVI	A,80	Load accumulator with 80H to configure CWR of 8255.
OUT	CWR	Configure CWR to display output with accumulator value. i.e 80
MVI	A,FF	Initialize accumulator with FFH to display ongoing sawtooth from bottom of screen.
OUT	PA	Send the value FFH through output port A.(which is displayed on screen as single dot).
OUT	PB	Send the value FFH through output port B.
DCR	A	Decrement the value of accumulator to extend the downgoing sawtooth.
JMP	BK	Jump back to display decremented value as an output.

Program Code


MVI	A,80
OUT	CWR
MVI	A,FF
OUT	PA
OUT	PB
DCR	A
JMP	BK

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