In assembly programming, assume a series of bytes is stored in memory locations

Question

In assembly programming, assume a series of bytes is stored in memory locations starting at address $1000. The number of bytes in this series is unknown. However, the last byte of the series has a value of $DD. Write a small program and a subroutine for determining the number of bytes that are present in this series. Do not count the last byte i.e., $DD. Store the total number of bytes found in the series at memory address $0000. Document the subroutine’s details using all applicable in-line and full line comments

Explanation / Answer

Mov R0,$1000

Mov R1,$DD

LOOP: MOV ax, @R0

MOV @R1, bx

end LOOP

STOP: SJMP STOP

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