diff --git a/iceOS.iso b/iceOS.iso
new file mode 100644
index 0000000..4311141
Binary files /dev/null and b/iceOS.iso differ
diff --git a/isodir/boot/grub/grub.cfg b/isodir/boot/grub/grub.cfg
new file mode 100644
index 0000000..11f924c
--- /dev/null
+++ b/isodir/boot/grub/grub.cfg
@@ -0,0 +1,7 @@
+set timeout = 0
+set default = 0
+
+menuentry "iceOS" {
+    multiboot2 /boot/iceOS.bin
+    boot
+}
diff --git a/isodir/boot/iceOS.bin b/isodir/boot/iceOS.bin
new file mode 100755
index 0000000..bec8ff8
Binary files /dev/null and b/isodir/boot/iceOS.bin differ
diff --git a/kernel/cpu/ports.asm b/kernel/cpu/ports.asm
index 271c44a..0d9a86e 100644
--- a/kernel/cpu/ports.asm
+++ b/kernel/cpu/ports.asm
@@ -16,6 +16,6 @@ outb:
     ret
 
 inb:
-    mov dx, [esp]
+    mov dx, [esp + 4]
     in al, dx
     ret
\ No newline at end of file
diff --git a/kernel/drivers/timer.c b/kernel/drivers/timer.c
index 78746b3..5375cac 100644
--- a/kernel/drivers/timer.c
+++ b/kernel/drivers/timer.c
@@ -12,6 +12,7 @@ static void timer_callback(registers_t regs) {
     uint8_t buf[8];
     itoa(tick, buf, 10);
     kprint((uint8_t*)"Time: ");
+    uitoa(tick, buf, 10);
     kprint((uint8_t*)buf);
     kprint((uint8_t*)"\n");
 
diff --git a/kernel/libc/string.c b/kernel/libc/string.c
index 1670b35..7cb8c57 100644
--- a/kernel/libc/string.c
+++ b/kernel/libc/string.c
@@ -52,7 +52,7 @@ uint8_t *uitoa(uint32_t val, uint8_t *buf, uint32_t radix) {
     uint32_t start = i;
     uint32_t x = val;
 
-    if(radix == 10) {
+    if(radix == 16) {
         buf[i++] = '0';
         buf[i++] = 'x';
         start = i;
@@ -67,7 +67,7 @@ uint8_t *uitoa(uint32_t val, uint8_t *buf, uint32_t radix) {
     } while(x /= radix);
 
     uint8_t *s = buf+start;
-    uint8_t *e = buf+(i+1);
+    uint8_t *e = buf+(i-1);
 
     while(s < e) {
         uint8_t t = *s;