b) An 8051 subroutine is shown below: MOV RO, #20OH MOV @RO, #0 LOOP: INC RO CJNE RO, #80H,LOOP RET i. What does the subroutine do? In how many machine cycles does each instruction execute? How many bytes long is each instruction? Convert the subroutine to machine language (Hexcode). How long does this subroutine take to execute? (Assume 12 MHz operation) ii. iii. iv. v.

Database System Concepts
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ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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b) An 8051 subroutine is shown below:
MOV
RO, #20H
LOOP:
MOV
@RO, #0
INC
RO
CJNE RO, #80H,LOOP
RET
i.
What does the subroutine do?
ii.
In how many machine cycles does each instruction execute?
ii.
How many bytes long is each instruction?
Convert the subroutine to machine language (Hexcode).
How long does this subroutine take to execute? (Assume 12 MHz operation)
iv.
V.
Transcribed Image Text:b) An 8051 subroutine is shown below: MOV RO, #20H LOOP: MOV @RO, #0 INC RO CJNE RO, #80H,LOOP RET i. What does the subroutine do? ii. In how many machine cycles does each instruction execute? ii. How many bytes long is each instruction? Convert the subroutine to machine language (Hexcode). How long does this subroutine take to execute? (Assume 12 MHz operation) iv. V.
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