I\'ve already completed the symbol table I just need help with the questions on

ID: 3826928 • Letter: I

Question

I've already completed the symbol table I just need help with the questions on translations the LC3 machine code to binary and hex
ORIG AND R2, R2, #0 LD Symbol Address R3, ADDR LEA R1, CIAO HERE LDR. BRZ RO, R1, 80 3004 HERE QUIT JSRR R3 300 RO, R1, STR #0 ADD R2, R2, #1 BRNZP HERE. 30 or QUIT TRAP 2x33A0 FILL ADDR .STRINGZ "Good Bye!" CIAO END bol Table program shown above. 191 Give the Lc-3 machine code translation of the following instructions from this program. Write your answers in binary and then in hexadecimal. R3, ADDR Hex BRNZP HERE HEK Modify one of the program instructions so that it will cause a Pass 1 syntax error 121 Error instruction Modify one of the program instructions so that it will cause a Pass 2 syntax error 12] Error instruction

Explanation / Answer

Solution:

Symbol table is

HERE

x3003

QUIT

x3009

ADDR

x300A

CIAO

x300B

LD R3,ADDR

PCOffset = x300A-x3002 = 8

Binary : 0010 011 000001000

Hex: x2608

BRNZP HERE

PCOffset = x3003-x3009 = -6

-6 (2’s complement)= 000000110 = 111111001 +1 = 11111010

Binary : 0000 1 1 1 111111010

Hex: x0FFA

Pass1 Syntax Error

Modify LD to LD1

LD1 R3,ADDR

Pass2 Syntax Error

Modify HERE to HERE1

BRNZP HERE1