diff --git a/README.md b/README.md
index e81f54cf..ec4fa468 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# Computer Architecture
+# Computer Architecture -
 
 ## Project
 
@@ -7,22 +7,24 @@
 ## Task List: add this to the first comment of your Pull Request
 
 ### Day 1: Get `print8.ls8` running
-- [ ] Inventory what is here
-- [ ] Implement `struct cpu` in `cpu.h`
-- [ ] Add RAM functions `cpu_ram_read` and `cpu_ram_write`
-- [ ] Implement `cpu_init()`
-- [ ] Implement the core of `cpu_run()`
-- [ ] Implement the `HLT` instruction handler
-- [ ] Add the `LDI` instruction
-- [ ] Add the `PRN` instruction
+- [x] Inventory what is here
+- [x] Implement `struct cpu` in `cpu.h`
+- [x] Add RAM functions `cpu_ram_read` and `cpu_ram_write`
+- [x] Implement `cpu_init()`
+- [x] Implement the core of `cpu_run()`
+- [x] Implement the `HLT` instruction handler
+- [x] Add the `LDI` instruction
+- [x] Add the `PRN` instruction
 
 ### Day 2: Add the ability to load files dynamically, get `mult.ls8` and `stack.ls8` running
-- [ ] Un-hardcode the machine code
-- [ ] Implement the `cpu_load` function to load an `.ls8` file given the filename passed in as an argument
-- [ ] Implement a Multiply instruction and Print the result (run `mult8.ls8`)
+- [x] Un-hardcode the machine code
+- [x] Implement the `cpu_load` function to load an `.ls8` file given the filename passed in as an argument
+- [x] Implement a Multiply instruction and Print the result (run `mult8.ls8`)
+
+### Day 3:
 - [ ] Implement the System Stack and be able to run the `stack.ls8` program
 
-### Day 3: Get `call.ls8` running
+### Day 4: Get `call.ls8` running
 - [ ] Implement the CALL and RET instructions
 - [ ] Implement Subroutine Calls and be able to run the `call.ls8` program
 
diff --git a/ls8/README.1.md b/ls8/README.1.md
new file mode 100644
index 00000000..c0e12237
--- /dev/null
+++ b/ls8/README.1.md
@@ -0,0 +1,174 @@
+# Sprint Challenge: Computer Architecture - Conditional Jumps
+
+This challenge allows you to practice the concepts and techniques learned over
+the past week and apply them in a concrete project. This Sprint explored TOPIC.
+During this Sprint, you studied CPU components, number bases, bitwise
+operations, CPU stack, interrupts, and subroutines.
+
+In your challenge this week, you will demonstrate proficiency by adding _conditional jumps_ to your LS-8 emulator as well as answering a few questions during a one-on-one session with a PM.
+
+## Instructions
+
+**Read these instructions carefully. Understand exactly what is expected
+_before_ starting this Sprint Challenge.**
+
+This is an individual assessment. All work must be your own. Your challenge
+score is a measure of your ability to work independently using the material
+covered through this sprint. You need to demonstrate proficiency in the concepts
+and objectives introduced and practiced in preceding days.
+
+You are not allowed to collaborate during the Sprint Challenge. However, you are
+encouraged to follow the twenty-minute rule and seek support from your PM and
+Instructor in your cohort help channel on Slack. Your work reflects your
+proficiency with Computer Architecture and your command of the related concepts
+and techniques.
+
+You have three hours to complete this challenge. Plan your time accordingly.
+
+## Commits
+
+Commit your code regularly and meaningfully. This helps both you (in case you
+ever need to return to old code for any number of reasons and your project manager.
+
+## Description
+
+In this code challenge, you will add _conditional jumps_ (AKA _conditional branching_) to your LS-8 emulator.
+
+## Project Set Up
+
+Options for submission, whichever is easier for you:
+
+* Copy your source into this repo, or...
+
+* Submit a PR for the Sprint Challenge from the `Computer-Architecture` repo
+  you've been using all along (in addition to the PR for `ANSWERS.md`)
+
+## Minimum Viable Product
+
+Your finished project must include all of the following requirements:
+
+- [ ] Add the `CMP` instruction and `equal` flag to your LS-8.
+
+- [ ] Add the `JMP` instruction.
+
+- [ ] Add the `JEQ` and `JNE` instructions.
+
+[See the LS-8 spec for details](https://github.com/LambdaSchool/Computer-Architecture/blob/master/LS8-spec.md)
+
+In your solution, it is essential that you follow best practices and produce
+clean and professional results. Schedule time to review, refine, and assess your
+work and perform basic professional polishing including spell-checking and
+grammar-checking on your work. It is better to submit a challenge that meets MVP
+than one that attempts too much and does not.
+
+Validate your work through testing and ensure that your code operates as designed.
+
+[Here is some code](sctest.ls8) that exercises the above instructions. It should
+print:
+
+```
+1
+4
+5
+```
+
+```
+# Code to test the Sprint Challenge
+#
+# Expected output:
+# 1
+# 4
+# 5
+
+10000010 # LDI R0,10
+00000000
+00001010
+10000010 # LDI R1,20
+00000001
+00010100
+10000010 # LDI R2,TEST1
+00000010
+00010011
+10100111 # CMP R0,R1
+00000000
+00000001
+01010101 # JEQ R2
+00000010
+10000010 # LDI R3,1
+00000011
+00000001
+01000111 # PRN R3
+00000011
+# TEST1 (address 19):
+10000010 # LDI R2,TEST2
+00000010
+00100000
+10100111 # CMP R0,R1
+00000000
+00000001
+01010110 # JNE R2
+00000010
+10000010 # LDI R3,2
+00000011
+00000010
+01000111 # PRN R3
+00000011
+# TEST2 (address 32):
+10000010 # LDI R1,10
+00000001
+00001010
+10000010 # LDI R2,TEST3
+00000010
+00110000
+10100111 # CMP R0,R1
+00000000
+00000001
+01010101 # JEQ R2
+00000010
+10000010 # LDI R3,3
+00000011
+00000011
+01000111 # PRN R3
+00000011
+# TEST3 (address 48):
+10000010 # LDI R2,TEST4
+00000010
+00111101
+10100111 # CMP R0,R1
+00000000
+00000001
+01010110 # JNE R2
+00000010
+10000010 # LDI R3,4
+00000011
+00000100
+01000111 # PRN R3
+00000011
+# TEST4 (address 61):
+10000010 # LDI R3,5
+00000011
+00000101
+01000111 # PRN R3
+00000011
+10000010 # LDI R2,TEST5
+00000010
+01001001
+01010100 # JMP R2
+00000010
+01000111 # PRN R3
+00000011
+# TEST5 (address 73):
+00000001 # HLT
+```
+
+## Stretch Problems
+
+After finishing your required elements, you can push your work further. These
+goals may or may not be things you have learned in this module but they build on
+the material you just studied. Time allowing, stretch your limits and see if you
+can deliver on the following optional goals:
+
+- [ ] Add the ALU operations: `AND` `OR` `XOR` `NOT` `SHL` `SHR` `MOD`
+- [ ] Add an `ADDI` extension instruction to add an immediate value to a register
+- [ ] Add timer interrupts
+- [ ] Add keyboard interrupts
diff --git a/ls8/cpu.c b/ls8/cpu.c
index bdb1f506..76398eb7 100644
--- a/ls8/cpu.c
+++ b/ls8/cpu.c
@@ -1,29 +1,52 @@
 #include "cpu.h"
+#include "string.h"
+#include "stdio.h"
+#include <stdlib.h>
 
-#define DATA_LEN 6
+#define DATA_LEN 12
 
 /**
  * Load the binary bytes from a .ls8 source file into a RAM array
  */
-void cpu_load(struct cpu *cpu)
+void cpu_load(struct cpu *cpu, char *program)
 {
-  char data[DATA_LEN] = {
-    // From print8.ls8
-    0b10000010, // LDI R0,8
-    0b00000000,
-    0b00001000,
-    0b01000111, // PRN R0
-    0b00000000,
-    0b00000001  // HLT
-  };
-
-  int address = 0;
-
-  for (int i = 0; i < DATA_LEN; i++) {
-    cpu->ram[address++] = data[i];
+
+  FILE *fp;
+
+  char line[1024];
+
+  fp = fopen(program, "r");
+
+  if( fp == NULL) {
+    fprintf(stderr, "Error opening file.\n");
+    exit(1);
   }
 
-  // TODO: Replace this with something less hard-coded
+  int i = 0x00;
+  while( fgets(line, sizeof(line), fp) != NULL ) {
+    char *endPtr;
+    unsigned char byte = strtol(line, &endPtr, 2);
+
+    if(endPtr == line) {
+      continue;
+    }
+
+    cpu_ram_write(cpu, i++, byte);
+  
+  }
+
+  fclose(fp);
+
+}
+
+unsigned char cpu_ram_read(struct cpu *cpu, unsigned char address)
+{
+  return cpu->ram[address];
+}
+
+void cpu_ram_write(struct cpu *cpu, int address, unsigned char value)
+{
+  cpu->ram[address] = value;
 }
 
 /**
@@ -47,14 +70,119 @@ void cpu_run(struct cpu *cpu)
 {
   int running = 1; // True until we get a HLT instruction
 
+  //int stack[256];
+  //int sp = cpu->registers[7];
+
+  //int PC = cpu->PC;
+  //unsigned char value;
+
   while (running) {
     // TODO
     // 1. Get the value of the current instruction (in address PC).
+    unsigned char instruction = cpu_ram_read(cpu, cpu->PC);
     // 2. Figure out how many operands this next instruction requires
     // 3. Get the appropriate value(s) of the operands following this instruction
+    unsigned char operandA = cpu_ram_read(cpu, cpu->PC + 1);
+    unsigned char operandB = cpu_ram_read(cpu, cpu->PC + 2);
+
     // 4. switch() over it to decide on a course of action.
     // 5. Do whatever the instruction should do according to the spec.
     // 6. Move the PC to the next instruction.
+    switch(instruction) {
+
+      case HLT:
+        running = 0;
+        break;
+
+      case LDI:
+        cpu->registers[operandA] = operandB;
+        cpu->PC += 3;
+        break;
+
+      case PRN:
+        printf("%d\n", cpu->registers[operandA]);
+        cpu->PC += 2;
+        break;
+
+      case MUL:
+        cpu->registers[operandA] = (cpu->registers[operandA] * cpu->registers[operandB]);
+        //test that MUL completed successfully
+        printf("%d\n", cpu->registers[operandA]);
+        cpu->PC += 2;
+        break;
+/*
+      case PUSH:
+        sp--;
+        //cpu->registers[sp] = cpu->registers[operandA];
+        cpu_ram_write(cpu, sp, cpu->registers[operandA]);
+        cpu->PC += 2;
+        break;
+
+      case POP:
+        cpu->registers[operandA] = cpu_ram_read(cpu, sp);
+        sp++;
+        cpu->PC += 2;
+        break;
+
+      case CALL:
+        sp--;
+        cpu->registers[sp] = cpu->registers[operandA];
+        cpu_ram_write(cpu, cpu->PC, operandA);
+        cpu->PC = cpu->registers[sp];
+        break;
+
+      case RET:
+        cpu->registers[operandA] = cpu_ram_read(cpu, sp);
+        cpu->PC = cpu->registers[operandA];
+        sp++;
+        break;
+        */
+        
+      case JMP:
+        //printf("jumping to instruction\n");
+        cpu->PC = cpu->registers[operandA];
+        break;
+
+      case CMP:
+        if(cpu->registers[operandA] == cpu->registers[operandB]) {
+          //printf("setting FL to 1\n");
+          cpu->FL = 1;
+          cpu->PC += 3;
+          break;
+
+        } else {
+          //printf("setting FL to 0\n");
+          cpu->FL = 0;
+          cpu->PC += 3;
+          break;
+        }
+        //break;
+      
+      case JEQ:
+        if(cpu->FL == 1) {
+          cpu->PC = cpu->registers[operandA];
+          break;
+        } else {
+          cpu->PC += 2;
+          break;
+        }
+        //break;
+
+      case JNE:
+        if(cpu->FL == 0) {
+          cpu->PC = cpu->registers[operandA];
+          break;
+        } else {
+          cpu->PC += 2;
+          break;
+        }
+        //break;
+
+      default:
+       fprintf(stderr, "PC %02x: unknown instruction %02x\n", cpu->PC, instruction);
+       exit(3);
+
+    }
   }
 }
 
@@ -63,5 +191,13 @@ void cpu_run(struct cpu *cpu)
  */
 void cpu_init(struct cpu *cpu)
 {
-  // TODO: Initialize the PC and other special registers
+  cpu->PC = 0;
+  cpu->FL = 0;
+
+  memset(cpu->registers, 0, 8*sizeof(unsigned char));
+
+  memset(cpu->ram, 0, 8*sizeof(unsigned char));
+
+  //cpu->registers[7] = 0xF4;
+
 }
diff --git a/ls8/cpu.h b/ls8/cpu.h
index 46e49c44..5365b92d 100644
--- a/ls8/cpu.h
+++ b/ls8/cpu.h
@@ -5,8 +5,12 @@
 struct cpu {
   // TODO
   // PC
+  int PC;
+  int FL;
   // registers (array)
+  unsigned char registers[8];
   // ram (array)
+  unsigned char ram[8];
 };
 
 // ALU operations
@@ -23,11 +27,22 @@ enum alu_op {
 #define LDI  0b10000010
 #define HLT  0b00000001
 #define PRN  0b01000111
+#define MUL  0b10100010
+#define PUSH 0b01000101
+#define POP  0b01000110
+#define CALL 0b01010000
+#define RET  0b00010001
+
+#define CMP  0b10100111
+#define JMP  0b01010100
+#define JEQ  0b01010101
+#define JNE  0b01010110
+
 // TODO: more instructions here. These can be used in cpu_run().
 
 // Function declarations
 
-extern void cpu_load(struct cpu *cpu);
+extern void cpu_load(struct cpu *cpu, char *program);
 extern void cpu_init(struct cpu *cpu);
 extern void cpu_run(struct cpu *cpu);
 
diff --git a/ls8/examples/sctest.ls8 b/ls8/examples/sctest.ls8
new file mode 100644
index 00000000..8f86bba7
--- /dev/null
+++ b/ls8/examples/sctest.ls8
@@ -0,0 +1,86 @@
+# Code to test the Sprint Challenge
+#
+# Expected output:
+# 1
+# 4
+# 5
+
+10000010 # LDI R0,10
+00000000
+00001010
+10000010 # LDI R1,20
+00000001
+00010100
+10000010 # LDI R2,TEST1
+00000010
+00010011
+10100111 # CMP R0,R1
+00000000
+00000001
+01010101 # JEQ R2
+00000010
+10000010 # LDI R3,1
+00000011
+00000001
+01000111 # PRN R3
+00000011
+# TEST1 (address 19):
+10000010 # LDI R2,TEST2
+00000010
+00100000
+10100111 # CMP R0,R1
+00000000
+00000001
+01010110 # JNE R2
+00000010
+10000010 # LDI R3,2
+00000011
+00000010
+01000111 # PRN R3
+00000011
+# TEST2 (address 32):
+10000010 # LDI R1,10
+00000001
+00001010
+10000010 # LDI R2,TEST3
+00000010
+00110000
+10100111 # CMP R0,R1
+00000000
+00000001
+01010101 # JEQ R2
+00000010
+10000010 # LDI R3,3
+00000011
+00000011
+01000111 # PRN R3
+00000011
+# TEST3 (address 48):
+10000010 # LDI R2,TEST4
+00000010
+00111101
+10100111 # CMP R0,R1
+00000000
+00000001
+01010110 # JNE R2
+00000010
+10000010 # LDI R3,4
+00000011
+00000100
+01000111 # PRN R3
+00000011
+# TEST4 (address 61):
+10000010 # LDI R3,5
+00000011
+00000101
+01000111 # PRN R3
+00000011
+10000010 # LDI R2,TEST5
+00000010
+01001001
+01010100 # JMP R2
+00000010
+01000111 # PRN R3
+00000011
+# TEST5 (address 73):
+00000001 # HLT
diff --git a/ls8/ls8.c b/ls8/ls8.c
index d24578ee..32c98a19 100644
--- a/ls8/ls8.c
+++ b/ls8/ls8.c
@@ -1,16 +1,28 @@
 #include <stdio.h>
 #include "cpu.h"
+#include <stdlib.h>
 
 /**
  * Main
  */
-int main(void)
+int main(int argc, char **argv)
 {
   struct cpu cpu;
+  char *program;
 
-  cpu_init(&cpu);
-  cpu_load(&cpu);
-  cpu_run(&cpu);
+  if (argc < 2) {
+    fprintf(stderr, "Please specify which program the LS8 should run.\nUsage: ls8 program\n");
+    exit(1);
+
+  } else {
+    program = argv[1];
+
+    printf("%s\n", program);
+
+    cpu_init(&cpu);
+    cpu_load(&cpu, program);
+    cpu_run(&cpu);
+  }
 
   return 0;
 }
\ No newline at end of file