diff --git a/.gitignore b/.gitignore
index b66d3d3..8f52a2e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,4 +2,7 @@ exec/*
 !exec/executable.txt
 *.log.txt
 *.out.txt
-mips_cpu_harvard.vcd
\ No newline at end of file
+mips_cpu_harvard.vcd
+.DS_Store
+.DS_Store
+inputs/.DS_Store
diff --git a/inputs/.DS_Store b/inputs/.DS_Store
deleted file mode 100644
index 2fef42f..0000000
Binary files a/inputs/.DS_Store and /dev/null differ
diff --git a/inputs/divquotient.txt b/inputs/divquotient.txt
deleted file mode 100644
index e8a53e9..0000000
--- a/inputs/divquotient.txt
+++ /dev/null
@@ -1,5 +0,0 @@
-34040004
-34050003
-0085001A
-00001012
-00000008
\ No newline at end of file
diff --git a/inputs/divremainder.txt b/inputs/divremainder.txt
deleted file mode 100644
index 66e5dba..0000000
--- a/inputs/divremainder.txt
+++ /dev/null
@@ -1,5 +0,0 @@
-34040004
-34050003
-0085001A
-00001010
-00000008
\ No newline at end of file
diff --git a/inputs/divuquotient b/inputs/divuquotient
deleted file mode 100644
index e19a2cf..0000000
--- a/inputs/divuquotient
+++ /dev/null
@@ -1,5 +0,0 @@
-34040004
-34050003
-0085001B
-00001012
-00000008
\ No newline at end of file
diff --git a/inputs/divuremainder.txt b/inputs/divuremainder.txt
deleted file mode 100644
index 5384638..0000000
--- a/inputs/divuremainder.txt
+++ /dev/null
@@ -1,5 +0,0 @@
-34040004
-34050003
-0085001B
-00001010
-00000008
\ No newline at end of file
diff --git a/inputs/j.ref.txt b/inputs/j.ref.txt
deleted file mode 100644
index 56a6051..0000000
--- a/inputs/j.ref.txt
+++ /dev/null
@@ -1 +0,0 @@
-1
\ No newline at end of file
diff --git a/inputs/jal.ref.txt b/inputs/jal.ref.txt
deleted file mode 100644
index d8263ee..0000000
--- a/inputs/jal.ref.txt
+++ /dev/null
@@ -1 +0,0 @@
-2
\ No newline at end of file
diff --git a/inputs/jalr.ref.txt b/inputs/jalr.ref.txt
deleted file mode 100644
index d8263ee..0000000
--- a/inputs/jalr.ref.txt
+++ /dev/null
@@ -1 +0,0 @@
-2
\ No newline at end of file
diff --git a/inputs/jr.ref.txt b/inputs/jr.ref.txt
deleted file mode 100644
index 56a6051..0000000
--- a/inputs/jr.ref.txt
+++ /dev/null
@@ -1 +0,0 @@
-1
\ No newline at end of file
diff --git a/inputs/lb.data.txt b/inputs/lb.data.txt
deleted file mode 100644
index 47c26d6..0000000
--- a/inputs/lb.data.txt
+++ /dev/null
@@ -1,4 +0,0 @@
-00000000
-008A0000
-00000000
-00000000
\ No newline at end of file
diff --git a/inputs/lb.ref.txt b/inputs/lb.ref.txt
deleted file mode 100644
index f8ff60d..0000000
--- a/inputs/lb.ref.txt
+++ /dev/null
@@ -1 +0,0 @@
-4294967178
\ No newline at end of file
diff --git a/inputs/lb.txt b/inputs/lb.txt
deleted file mode 100644
index 83898a5..0000000
--- a/inputs/lb.txt
+++ /dev/null
@@ -1,3 +0,0 @@
-34041003
-80820003
-00000008
\ No newline at end of file
diff --git a/inputs/lbu.data.txt b/inputs/lbu.data.txt
deleted file mode 100644
index 47c26d6..0000000
--- a/inputs/lbu.data.txt
+++ /dev/null
@@ -1,4 +0,0 @@
-00000000
-008A0000
-00000000
-00000000
\ No newline at end of file
diff --git a/inputs/lbu.ref.txt b/inputs/lbu.ref.txt
deleted file mode 100644
index eafdfb0..0000000
--- a/inputs/lbu.ref.txt
+++ /dev/null
@@ -1 +0,0 @@
-138
\ No newline at end of file
diff --git a/inputs/lbu.txt b/inputs/lbu.txt
deleted file mode 100644
index 06c0f06..0000000
--- a/inputs/lbu.txt
+++ /dev/null
@@ -1,3 +0,0 @@
-34041003
-90820003
-00000008
\ No newline at end of file
diff --git a/inputs/lh.data.txt b/inputs/lh.data.txt
deleted file mode 100644
index f3b4cfd..0000000
--- a/inputs/lh.data.txt
+++ /dev/null
@@ -1,4 +0,0 @@
-00000000
-00008123
-00000000
-00000000
\ No newline at end of file
diff --git a/inputs/lh.ref.txt b/inputs/lh.ref.txt
deleted file mode 100644
index 9e489ac..0000000
--- a/inputs/lh.ref.txt
+++ /dev/null
@@ -1 +0,0 @@
-4294934819
\ No newline at end of file
diff --git a/inputs/lh.txt b/inputs/lh.txt
deleted file mode 100644
index 3a583e1..0000000
--- a/inputs/lh.txt
+++ /dev/null
@@ -1,3 +0,0 @@
-34041003
-84820004
-00000008
\ No newline at end of file
diff --git a/inputs/lhu.data.txt b/inputs/lhu.data.txt
deleted file mode 100644
index f3b4cfd..0000000
--- a/inputs/lhu.data.txt
+++ /dev/null
@@ -1,4 +0,0 @@
-00000000
-00008123
-00000000
-00000000
\ No newline at end of file
diff --git a/inputs/lhu.ref.txt b/inputs/lhu.ref.txt
deleted file mode 100644
index db277c1..0000000
--- a/inputs/lhu.ref.txt
+++ /dev/null
@@ -1 +0,0 @@
-33059
\ No newline at end of file
diff --git a/inputs/lhu.txt b/inputs/lhu.txt
deleted file mode 100644
index 54a3692..0000000
--- a/inputs/lhu.txt
+++ /dev/null
@@ -1,3 +0,0 @@
-34041003
-94820004
-00000008
\ No newline at end of file
diff --git a/inputs/lui.ref.txt b/inputs/lui.ref.txt
deleted file mode 100644
index 7751570..0000000
--- a/inputs/lui.ref.txt
+++ /dev/null
@@ -1 +0,0 @@
-305419896
\ No newline at end of file
diff --git a/inputs/lui.txt b/inputs/lui.txt
deleted file mode 100644
index 6c9915e..0000000
--- a/inputs/lui.txt
+++ /dev/null
@@ -1,3 +0,0 @@
-34045678
-3C021234
-00000008
\ No newline at end of file
diff --git a/inputs/lw.data.txt b/inputs/lw.data.txt
deleted file mode 100644
index 50de8d2..0000000
--- a/inputs/lw.data.txt
+++ /dev/null
@@ -1,4 +0,0 @@
-00000000
-12345678
-00000000
-00000000
\ No newline at end of file
diff --git a/inputs/lw.ref.txt b/inputs/lw.ref.txt
deleted file mode 100644
index 7751570..0000000
--- a/inputs/lw.ref.txt
+++ /dev/null
@@ -1 +0,0 @@
-305419896
\ No newline at end of file
diff --git a/inputs/lw.txt b/inputs/lw.txt
deleted file mode 100644
index 7c6a2ee..0000000
--- a/inputs/lw.txt
+++ /dev/null
@@ -1,3 +0,0 @@
-34041002
-8C820002
-00000008
\ No newline at end of file
diff --git a/inputs/lwl.data.txt b/inputs/lwl.data.txt
deleted file mode 100644
index 325d898..0000000
--- a/inputs/lwl.data.txt
+++ /dev/null
@@ -1,4 +0,0 @@
-00000000
-AAAA1234
-00000000
-00000000
\ No newline at end of file
diff --git a/inputs/lwl.ref.txt b/inputs/lwl.ref.txt
deleted file mode 100644
index 7751570..0000000
--- a/inputs/lwl.ref.txt
+++ /dev/null
@@ -1 +0,0 @@
-305419896
\ No newline at end of file
diff --git a/inputs/lwl.txt b/inputs/lwl.txt
deleted file mode 100644
index a62ec0b..0000000
--- a/inputs/lwl.txt
+++ /dev/null
@@ -1,4 +0,0 @@
-34041003
-34025678
-88820003
-00000008
\ No newline at end of file
diff --git a/inputs/lwr.data.txt b/inputs/lwr.data.txt
deleted file mode 100644
index ca679b8..0000000
--- a/inputs/lwr.data.txt
+++ /dev/null
@@ -1,4 +0,0 @@
-00000000
-5678AAAA
-00000000
-00000000
\ No newline at end of file
diff --git a/inputs/lwr.ref.txt b/inputs/lwr.ref.txt
deleted file mode 100644
index 7751570..0000000
--- a/inputs/lwr.ref.txt
+++ /dev/null
@@ -1 +0,0 @@
-305419896
\ No newline at end of file
diff --git a/inputs/lwr.txt b/inputs/lwr.txt
deleted file mode 100644
index 22f33f9..0000000
--- a/inputs/lwr.txt
+++ /dev/null
@@ -1,4 +0,0 @@
-34041003
-3C021234
-98820002
-00000008
\ No newline at end of file
diff --git a/inputs/slt/.DS_Store b/inputs/slt/.DS_Store
deleted file mode 100644
index a6c4cc6..0000000
Binary files a/inputs/slt/.DS_Store and /dev/null differ
diff --git a/reference/reference.txt b/reference/reference.txt
new file mode 100644
index 0000000..8583183
--- /dev/null
+++ b/reference/reference.txt
@@ -0,0 +1,564 @@
+== Instruction ==
+C code
+Assembly code
+Hex code
+Reference Output
+================
+
+ADDIU Add immediate unsigned (no overflow) 
+
+== ADDU Add unsigned (no overflow) ==
+
+int main(void) {
+    int a = 3 + 5;
+}
+
+ORI $4,$0,3
+ORI $5,$0,5
+ADDU $2,$4,$5
+JR $0
+
+34040003
+34050005
+00851021
+00000008
+
+register_v0 = 8
+
+==AND Bitwise and==
+
+ORI $5,$0,0xCCCC
+LUI $5,0xCCCC 
+ORI $4,$0,0xAAAA
+LUI $4,0xAAAA  
+AND  $2,$4,$5
+JR $0
+
+3405cccc
+3c05cccc
+3404aaaa
+3c04aaaa
+00851024
+00000008
+
+register_v0 = 0x88888888
+
+==ANDI Bitwise and immediate==
+
+ORI $4,$0,0xAAAA
+LUI $4,0xAAAA  
+ANDI $2,$4,0xCCCC
+JR $0
+
+3404aaaa
+3c04aaaa
+3082cccc
+00000008
+
+register_v0 = 0x00008888
+
+==BEQ	Branch on equal==
+
+ORI $4,$0,5
+ORI $5,$0,5
+BEQ $4,$5,3
+NOP 
+JR $0
+NOP
+ORI $2,$0,1
+JR $0
+
+34040005
+34050005
+10850003
+00000000
+00000008
+00000000
+34020001
+00000008
+
+register_v0 = 1
+
+==BGEZ Branch on greater than or equal to zero==
+
+ORI $4,$0,3
+BGEZ $4,3
+NOP
+JR $0
+NOP
+ORI $2,$0,1
+JR $0
+
+34040003
+04810003
+00000000
+00000008
+00000000
+34020001
+00000008
+
+register_v0 = 1
+
+==BGEZAL Branch on non-negative (>=0) and link==
+
+ORI $4,$0,3
+BGEZAL $4,4
+NOP
+ADDIU $2,$2,1
+JR $0
+NOP
+ORI $2,$0,1
+JR $31
+
+34040003
+04910004
+00000000
+24420001
+00000008
+00000000
+34020001
+03E00008
+
+register_v0 = 2
+
+==BGTZ Branch on greater than zero==
+
+ORI $4,$0,3
+BGTZ $4,3
+NOP
+JR $0
+NOP
+ORI $2,$0,1
+JR $0
+
+34040003
+1C800003
+00000000
+00000008
+00000000
+34020001
+00000008
+
+register_v0 = 1
+
+==BLEZ Branch on less than or equal to zero==
+
+LUI $4,0xFFFF
+BLEZ $4,3
+NOP
+JR $0
+NOP
+ORI $2,$0,1
+JR $0
+
+3C05FFFF
+18800003
+00000000
+00000008
+00000000
+34020001
+00000008
+
+register_v0 = 1
+
+==BLTZ Branch on less than zero==
+
+LUI $4,0xFFFF 
+BLTZ $4,3
+NOP
+JR $0
+NOP
+ORI $2,$0,1
+JR $0
+
+3C05FFFF
+04800003
+00000000
+00000008
+00000000
+34020001
+00000008
+
+register_v0 = 1
+
+==BLTZAL	Branch on less than zero and link==
+
+LUI $4,0xFFFF 
+BLTZAL $4,4
+NOP
+ADDIU $2,$2,1
+JR $0
+NOP
+ORI $2,$0,1
+JR $31
+
+3C05FFFF
+04900004
+00000000
+24420001
+00000008
+00000000
+34020001
+03E00008
+
+register_v0 = 2
+
+==BNE	Branch on not equal==
+
+ORI $4,$0,3
+ORI $5,$0,5
+BNE $4,$5,3
+NOP
+JR $0
+NOP
+ORI $2,$0,1
+JR $0
+
+34040003
+34040005
+14850003
+00000000
+00000008
+00000000
+34020001
+00000008
+
+register_v0 = 1
+
+==DIV	Divide== //May need other testcases for -ve/+ve, -ve/-ve
+
+ORI $4,$0,3
+ORI $5,$0,9
+DIV  $5,$4
+MFHI $4
+MFLO $5
+ADDU $2,$4,$5
+JR $0
+
+34040003
+34050009
+00A4001A
+00002010
+00002812
+00851021
+00000008
+
+register_v0 = 3
+
+==DIVU	Divide unsigned== //May need other testcases for -ve/+ve, -ve/-ve
+
+LUI $4,0x8000 
+ORI $5,$0,2
+DIVU  $4,$5
+MFHI $4
+MFLO $5
+ADDU $2,$4,$5
+JR $0
+
+34048000
+34050002
+0085001B
+00002010
+00002812
+00851021
+00000008
+
+register_v0 = 0x40000000
+
+==J	Jump==
+
+J 4
+NOP
+JR $0
+NOP
+ORI $2,$0,1
+JR $0
+
+08000004
+00000000
+00000008
+00000000
+34020001
+00000008
+
+register_v0 = 1
+
+==JALR	Jump and link register==
+
+ORI $5,$0,0x001C
+LUI $5,0xBFC0
+JALR $4,$5
+NOP
+ADDIU $2,$2,1
+JR $0
+NOP
+ORI $2,$0,1
+JR $4
+
+3405001C
+3C05BCF0
+00A02009
+00000000
+24420001
+00000008
+00000000
+34020001
+00800008
+
+register_v0 = 2
+
+==JAL	Jump and link==
+
+JAL 5
+NOP
+ADDIU $2,$2,1
+JR $0
+NOP
+ORI $2,$0,1
+JR $31
+
+0C000005
+00000000
+24420001
+00000008
+00000000
+34020001
+03E00008
+
+register_v0 = 2
+
+==JR	Jump register==
+
+ORI $5,$0,0x0014
+LUI $5,0xBFC0  
+JR $5  
+NOP
+JR $0
+NOP
+ORI $2,$0,1
+JR $0
+
+34050014
+3C05BCF0
+00A00008
+00000000
+00000008
+34020001
+00000008
+
+register_v0 = 1
+
+==LB	Load byte==
+
+ORI $4,$0,0x1003
+LB  $2,3($4)
+JR $0
+
+-Instruction Hex
+
+34041003
+80820003
+00000008
+
+-Memory Hex
+
+00000000
+008A0000
+00000000
+00000000
+
+register_v0 = 0xFFFFFF8A
+
+==LBU	Load byte unsigned==
+
+ORI $4,$0,0x1003
+LBU  $2,3($4)
+JR $0
+
+-Instruction Hex
+
+34041003
+90820003
+00000008
+
+-Memory Hex
+
+00000000
+008A0000
+00000000
+00000000
+
+register_v0 = 0x0000008A
+
+==LH	Load half-word==
+
+ORI $4,$0,0x1003
+LH  $2,4($4)
+JR $0
+
+-Instruction Hex
+
+34041003
+84820004
+00000008
+
+-Memory Hex
+
+00000000
+00008123
+00000000
+00000000
+
+register_v0 = 0xFFFF8123
+
+==LHU	Load half-word unsigned==
+
+ORI $4,$0,0x1003
+LHU $2,4($4)
+JR $0
+
+-Instruction Hex
+
+34041003
+94820004
+00000008
+
+-Memory Hex
+
+00000000
+00008123
+00000000
+00000000
+
+register_v0 = 0x00008123
+
+==LUI	Load upper immediate==
+
+ORI $2,$0,0x5678
+LUI $2,0x1234
+JR $0
+
+34045678
+3C021234
+00000008
+
+register_v0 = 0x12345678
+
+==LW	Load word==
+
+ORI $4,$0,0x1002
+LW  $2, 2($4)
+JR $0
+
+-Instruction Hex
+
+34041002
+8C820002
+00000008
+
+-Memory Hex
+
+00000000
+12345678
+00000000
+00000000
+
+register_v0 = 0x12345678
+
+==LWL	Load word left==
+
+ORI $4,$0,0x1003
+ORI $2,$0,0x5678
+LWL  $2,3($4)
+JR $0
+
+-Instruction Hex
+
+34041003
+34025678
+88820003
+00000008
+
+-Memory Hex
+
+00000000
+AAAA1234
+00000000
+00000000
+
+register_v0 = 0x12345678
+
+==LWR	Load word right==
+
+ORI $4,$0,0x1003
+LUI $2,0x1234
+LWR $2,2($4)
+JR $0
+
+-Instruction Hex
+
+34041003
+3C021234
+98820002
+00000008
+
+-Memory Hex
+
+00000000
+5678AAAA
+00000000
+00000000
+
+register_v0 = 0x12345678
+
+// DIVU Divide unsigned
+
+// DIV Divide
+
+//MFHI Move from Hi 
+
+//MFLO Move from lo 
+
+//MTHI	Move to HI
+
+//MTLO	Move to LO
+
+//MULT	Multiply**
+
+//MULTU	Multiply unsigned**
+
+//OR	Bitwise or
+
+//ORI	Bitwise or immediate
+
+//SB	Store byte
+
+//SH	Store half-word**
+
+//SLL	Shift left logical
+
+//SLLV	Shift left logical variable 
+
+//SLT	Set on less than (signed)
+
+//SLTI	Set on less than immediate (signed)
+
+//SLTIU	Set on less than immediate unsigned
+
+//SLTU	Set on less than unsigned
+
+//SRA	Shift right arithmetic
+
+//SRAV	Shift right arithmetic
+
+//SRL	Shift right logical
+
+//SRLV	Shift right logical variable
+
+//SUBU	Subtract unsigned
+
+//SW	Store word
+
+//XOR	Bitwise exclusive or
+
+//XORI	Bitwise exclusive or immediate