Modify the following program in lc-3 to get the input(numbers) from the keyboard and print the result to console
Modify the following program in lc-3 to get the input(numbers) from the keyboard and print the result to console
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Modify the following program in lc-3 to get the input(numbers) from the keyboard and print the result to console.
.ORIG x3000
Loop LD R0, number1 ; load number1 into R0
LDR R1, number2 ; load number2 into R1
ST R2, SaveR2 ; save register R2
LD R5, goSUB ; load address of SUB into R4
JSRR R5 ; go to subroutine whose address in R5
STR R3, result ; store result
LD R2, SaveR2 ; restore old value R2
HALT
number1 .FILL #10
number2 .FILL # -8
goSUB .FILL SUB ; initialize goSUB to address of SUB
SaveR2 .BLKW #1; reserve space SaveR2 and SaveR3
result .BLKW #1
SUB NOT R1, R1
ADD R2, R1, #1
ADD R3, R0, R2
RET
.END
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