diff --git a/2ano/1semestre/ac1/aula02/AC1-P-Aula2-Intro.pdf b/2ano/1semestre/ac1/aula02/AC1-P-Aula2-Intro.pdf
new file mode 100644
index 0000000..3592e80
Binary files /dev/null and b/2ano/1semestre/ac1/aula02/AC1-P-Aula2-Intro.pdf differ
diff --git a/2ano/1semestre/ac1/aula02/AC1-P-Aula2.pdf b/2ano/1semestre/ac1/aula02/AC1-P-Aula2.pdf
new file mode 100644
index 0000000..ebe27ef
Binary files /dev/null and b/2ano/1semestre/ac1/aula02/AC1-P-Aula2.pdf differ
diff --git a/2ano/1semestre/ac1/aula02/ex01.asm b/2ano/1semestre/ac1/aula02/ex01.asm
new file mode 100644
index 0000000..9b1dd7b
--- /dev/null
+++ b/2ano/1semestre/ac1/aula02/ex01.asm
@@ -0,0 +1,22 @@
+	.data
+	.text
+	.globl	main
+
+	.eqv	val_1, 0x5C1B
+	.eqv	val_2, 0xA3E4
+
+	.eqv	val_3, 0xE543
+	
+main:	# a), b)
+	ori	$t0, $0, val_1
+	ori	$t1, $0, val_2
+	and	$t2, $t0, $t1
+	or	$t3, $t0, $t1
+	nor	$t4, $t0, $t1
+	xor	$t5, $t0, $t1
+	
+	# c)
+	ori	$t6, $0, val_3
+	nor	$t7, $t6, $0
+	
+	jr	$ra
diff --git a/2ano/1semestre/ac1/aula02/ex02_a.asm b/2ano/1semestre/ac1/aula02/ex02_a.asm
new file mode 100644
index 0000000..54733d6
--- /dev/null
+++ b/2ano/1semestre/ac1/aula02/ex02_a.asm
@@ -0,0 +1,11 @@
+        .data
+        .text
+        .globl main
+        .eqv Imm, 0x00000001
+main:   li $t0, 0x12345678
+        
+        sll $t2,$t0,Imm
+        srl $t3,$t0,Imm
+        sra $t4,$t0,Imm
+
+        jr $ra
diff --git a/2ano/1semestre/ac1/aula02/ex02_d-e.asm b/2ano/1semestre/ac1/aula02/ex02_d-e.asm
new file mode 100644
index 0000000..0050cf7
--- /dev/null
+++ b/2ano/1semestre/ac1/aula02/ex02_d-e.asm
@@ -0,0 +1,8 @@
+	.data
+	.text
+	.globl main
+main:   li	$a0,0x1010
+	li	$v0,1
+	syscall
+	
+	jr 	$ra
\ No newline at end of file
diff --git a/2ano/1semestre/ac1/aula02/ex03_c.asm b/2ano/1semestre/ac1/aula02/ex03_c.asm
new file mode 100644
index 0000000..2ae30cb
--- /dev/null
+++ b/2ano/1semestre/ac1/aula02/ex03_c.asm
@@ -0,0 +1,12 @@
+	.data
+str1:	.asciiz "Hello world"
+	.eqv print_string,4
+	
+	.text
+	.globl main
+	
+main:	la $a0,str1
+	li $v0,print_string
+	syscall
+	
+	jr $ra
\ No newline at end of file
diff --git a/2ano/1semestre/ac1/aula02/ex03_d.asm b/2ano/1semestre/ac1/aula02/ex03_d.asm
new file mode 100644
index 0000000..1ad2827
--- /dev/null
+++ b/2ano/1semestre/ac1/aula02/ex03_d.asm
@@ -0,0 +1,31 @@
+	.data
+prompt:	.asciiz "Introduza 2 numeros\n"
+result:	.asciiz "A soma dos dois numeros e: "
+	.eqv print_string,4
+	.eqv read_int,5
+	.eqv print_int10,1
+	
+	.text
+	.globl main
+	
+main:	li 	$v0,print_string
+	la 	$a0,prompt
+	syscall
+	
+	li	$v0,read_int
+	syscall
+	move	$t0,$v0
+	li	$v0,read_int
+	syscall
+	move	$t1,$v0
+	add	$t2,$t1,$t0
+	
+	li	$v0,print_string
+	la	$a0,result
+	syscall
+
+	li	$v0,print_int10
+	move	$a0,$t2
+	syscall
+	
+	jr $ra