LC3 Assembly

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• LC3 Assembly: a. Using the .FILL & .BLKW pseudo-ops, store the value x4000 in one location, and

  .ORIG    x3000                ; Starting program from address x3000; LD R2,ONLY                ; Using Direct mode to store the value of ON...

• LC3 Assembly: use the stack to build a single-digit RPN (Reverse Polish Notation) multiplier: this

      .ORIG x3000     LD R2 StackSize     LEA R3 Stack     ADD R3 R3 #2     LD R1 Minus48     AND R4 R4 #0    ; will contain ans Input     TR...

• LC3 Assembly: Now write a routine that takes a sequence of 10 characters from the keyboard (echoing

      .ORIG x3000 ; take 10 character input from user     LEA R3,Label    ; load array base addr in R3     LD R2,Ten    ; load 10 in R2 (coun...

• LC3 Assembly: Input any positive decimal number less than 32,000 at the keyboard and convert it to

      .ORIG x3000     AND R2 R2 #0        ; counter     AND R5 R5 #0 Input     TRAP x20     ADD R1 R0 #-10     BRz InDone     TRAP x21     AD...

• LC3 Assembly: Implement a simple 4-word stack as a subroutine with two entry points, PUSH and POP

      .ORIG x3000     LEA R2 Stack        ; R2 will be Top     LD R3 Size     ADD R2 R2 R3  Start     JSR PrintNL     JSR PrintNL     LEA R0 ...

• LC3 Assembly: Write a "bit pattern" output routine that prints to the console the value stored in a

      .ORIG x3000     LD R2 Number     LD R3 Max Start     NOT R0 R3     ADD R0 R0 #1     ADD R0 R2 R0     ADD R6 R0 #0     BRn Zero     ADD ...