;Program to copy an array of data from one block of memory to another .
;Add decimal 14 to the value of each word before storing in the destination array.
;Keep copying until the program reaches a zero value in the source array.
.ORIG x3000 ;Program starts at address hex 3000
LD R0, SRC ;(Changed) from LEA to LD Load address of SRC into Register 0
LD R1, DEST ;Load contents of memory address DEST into Register 1
LOOP LDR R2, R0, #0 ;Load contents of memory location whose address is in R0 into R2
BRZ DONE ;(Changed) from SRC to DONE If last operation was zero, branch to end
ADD R2, R2, #14 ;Add decimal 14 to value in R2
STR R2, R1, #0 ;Store contents of R2 into memory whose address is in R1
ADD R0, R0, #1 ;Add 1 to R0
ADD R1, R1, #1 ;Add 1 to R1
BR LOOP ;(Changed) from BRN to BR regardless of the condition it branches to LOOP
DONE TRAP x25 ;Trap to HALT the program.
SRC .FILL x4000 ;Address of start of source data array
DEST .FILL x5000 ;Address of start of destination array.
.END
Question
Can somebody help me with this program it is supposed to add 14 to the numbers starting at x4000 and store the new numbers starting in x5000. I just started using the LC-3 but we haven't learned to actually code in it yet. This code only has 3 errors but I'm not sure what I should be fixing.
;Program to copy an array of data from one block of memory to another .
;Add decimal 14 to the value of each word before storing in the destination array.
;Keep copying until the program reaches a zero value in the source array.
.ORIG x3000 ;Program starts at address hex 3000
LEA R0, SRC ;Load address of SRC into Register 0
LD R1, DEST ;Load contents of memory address DEST into Register 1
LOOP LDR R2, R0, #0 ;Load contents of memory location whose address is in R0 into R2
BRZ SRC ;If last operation was zero, branch to end
ADD R2, R2, #14 ;Add decimal 14 to value in R2
STR R2, R1, #0 ;Store contents of R2 into memory whose address is in R1
ADD R0, R0, #1 ;Add 1 to R0
ADD R1, R1, #1 ;Add 1 to R1
BRN LOOP ;If last operation was negative, branch to LOOP
DONE TRAP x25 ;Trap to HALT the program.
SRC .FILL x4000 ;Address of start of source data array
DEST .FILL x5000 ;Address of start of destination array.
.END
Solution
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