SAW-TOOTH WAVE GENERATION
PROGRAM:
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ADDRESS
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OPCODE
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LABEL
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MNEMONICS
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OPERAND
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COMMENT
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80C0
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MVI
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A,80H
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Load accu with
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80C1
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80h
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80C2
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OUT
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43H
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Load control reg with
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80C3
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Control word
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80C4
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UP
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MVI
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A,00H
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Clear accumulator
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80C5
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80C6
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PQR
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OUT
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40H
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Output accumulator value
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80C7
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To port A
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80C8
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MVI
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A,FFH
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Load Accumulator
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80C9
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with FFH
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80CA
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OUT
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40H
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Output Accumulator value
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80CB
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To port A
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80CC
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XYZ
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DCR
|
A
|
Decrement Accumulator
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80CD
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OUT
|
40H
|
Output accumulator value
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80CE
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To port A
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80CF
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CALL
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DELAY
|
Goto Subroutine Delay
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80D0
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80D1
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80D2
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CPI
|
00
|
Compare Accumulator
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80D3
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Value with 00H
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80D4
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JNZ
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XYZ
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If A reg is not zero,
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80D5
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Goto XYZ
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80D6
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80D7
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JMP
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PQR
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Jmp to PQR
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80D8
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JMP
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UP
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Unconditionally
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ADDRESS
|
OPCODE
|
LABEL
|
MNEMONICS
|
OPERAND
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COMMENT
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80D9
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80DA
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DELAY
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MVI
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D,05H
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Load D reg with 05h
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80DB
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80DC
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ABC
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DCR
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D
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Decrement D reg
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80DD
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JNZ
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ABC
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If D reg is not zero
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80DE
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Goto ABC
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80DF
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80E0
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RET
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Return to main program
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OBSERVATION:
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