what is wrong with my code ORIG x 3 0 0 0 DisplayPrompt LD R 0 , promptMessagePtr PUTS InitializeRegisters AND R 4 , R 4 , 0 AND R 7 , R 7 , 0 AND R 2 , R 2 , 0 LD R 5 , digitCounter GetInitialChar GETC OUT LD R 2 , newlineValidator ADD R 2 , R 2 , R 0 BRz EndProgram LD R 2 , plusValidator ADD R 2 , R 2 , R 0 BRz ReadDigits LD R 2 , minusValidator ADD R 2 , R 2 , R 0 BRz ApplyNegativeFlag BR DisplayErrorMessage ApplyNegativeFlag ADD R 7 , R 7 , 1 BRz ReadDigits ReadDigits GETC OUT LD R 2 , newlineValidator ADD R 2 , R 2 , R 0 BRz EndProgram LD R 2 , zeroValidator ADD R 2 , R 2 , R 0 BRn DisplayErrorMessage LD R 2 , nineValidator ADD R 2 , R 2 , R 0 BRp DisplayErrorMessage LD R 2 , zeroValidator ASCII TO DECIMAL NOT R 2 , R 2 ADD R 2 , R 2 , 1 ADD R 0 , R 0 , R 2 LD R 3 , baseMultiplier ADD R 4 , R 4 , R 0 Add the current digit to the accumulated result ADD R 4 , R 4 , R 4 Multiply the accumulated result by 2 ADD R 4 , R 4 , R 4 Multiply the accumulated result by 4 ADD R 4 , R 4 , R 4 Multiply the accumulated result by 8 ADD R 4 , R 4 , R 0 Add the current digit ADD R 5 , R 5 , 1 BRz EndProgram BRp ReadDigits DisplayErrorMessage LD R 0 , errorMessagePtr PUTS BR DisplayPrompt EndProgram IF FLAG IS SET TO NEGATIVE, CONVERT TO NEGATIVE BRn ApplyNegativeSign OUTPUT NEWLINE LD R 0 , newlineValidator OUT HALT ApplyNegativeSign NOT R 4 , R 4 ADD R 4 , R 4 , 1 BR EndProgram Program Data promptMessagePtr FILL xB 0 0 0 errorMessagePtr FILL xB 2 0 0 DATA digitCounter FILL 5 newlineValidator FILL 1 0 plusValidator FILL 4 3 minusValidator FILL 4 5 zeroValidator FILL 4 8 nineValidator FILL 5 7 baseMultiplier FILL 1 0 END Remote data ORIG xB 0 0 0 prompt message STRINGZ Input a positive or negative decimal number ( max 5 digits ) , followed by ENTER END ORIG xB 2 0 0 error message STRINGZ ERROR invalid input END

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Question: what is wrong with my code: . ORIG x 3 0 0 0 DisplayPrompt: LD R 0 , promptMessagePtr PUTS InitializeRegisters: AND R 4 ,

what is wrong with my code:

.

ORIG x

3000

DisplayPrompt:

LD R

0,

promptMessagePtr

PUTS

InitializeRegisters:

AND R

4,

4,

0

AND R

7,

7,

0

AND R

2,

2,

0

LD R

5,

digitCounter

GetInitialChar:

GETC

OUT

LD R

2,

newlineValidator

ADD R

2,

2,

0

BRz EndProgram

LD R

2,

plusValidator

ADD R

2,

2,

0

BRz ReadDigits

LD R

2,

minusValidator

ADD R

2,

2,

0

BRz ApplyNegativeFlag

BR DisplayErrorMessage

ApplyNegativeFlag:

ADD R

7,

7,

- 1

BRz ReadDigits

ReadDigits:

GETC

OUT

LD R

2,

newlineValidator

ADD R

2,

2,

0

BRz EndProgram

LD R

2,

zeroValidator

ADD R

2,

2,

0

BRn DisplayErrorMessage

LD R

2,

nineValidator

ADD R

2,

2,

0

BRp DisplayErrorMessage

LD R

2,

zeroValidator ; ASCII TO DECIMAL

NOT R

2,

2

ADD R

2,

2,

1

ADD R

0,

0,

2

LD R

3,

baseMultiplier

ADD R

4,

4,

0

; Add the current digit to the accumulated result

ADD R

4,

4,

4

; Multiply the accumulated result by

2

ADD R

4,

4,

4

; Multiply the accumulated result by

4

ADD R

4,

4,

4

; Multiply the accumulated result by

8

ADD R

4,

4,

0

; Add the current digit

ADD R

5,

5,

- 1

BRz EndProgram

BRp ReadDigits

DisplayErrorMessage:

LD R

0,

errorMessagePtr

PUTS

BR DisplayPrompt

EndProgram:

; IF FLAG IS SET TO NEGATIVE, CONVERT TO NEGATIVE

BRn ApplyNegativeSign

; OUTPUT NEWLINE

LD R

0,

newlineValidator

OUT

HALT

ApplyNegativeSign:

NOT R

4,

4

ADD R

4,

4,

1

BR EndProgram

; Program Data

promptMessagePtr

.

FILL xB

000

errorMessagePtr

.

FILL xB

200

; DATA

digitCounter

.

FILL #

5

newlineValidator

.

FILL #

- 10

plusValidator

.

FILL #

- 43

minusValidator

.

FILL #

- 45

zeroValidator

.

FILL #

- 48

nineValidator

.

FILL #

- 57

baseMultiplier

.

FILL #

10

.

END

; Remote data

.

ORIG xB

000

; prompt message

.

STRINGZ "Input a positive or negative decimal number

(

max

5

digits

),

followed by ENTER

"

.

END

.

ORIG xB

200

; error message

.

STRINGZ "ERROR: invalid input

"

.

END

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