diff --git a/arch/main.c b/arch/main.c
index ae3f8b1..ed777f1 100644
--- a/arch/main.c
+++ b/arch/main.c
@@ -15,12 +15,8 @@ void main(struct KernelMQ_Multiboot_Info multiboot_info)
     gdt_initialize();
     idt_initialize();
 
-    asm volatile ("int $0x0");
     asm volatile ("int $0x3");
     asm volatile ("int $0x4");
-    asm volatile ("int $0xF");
-    asm volatile ("int $0x10");
-    asm volatile ("int $0x1F");
 
     logger_warn("Nothing to do.");
     logger_fail("Halt.");
diff --git a/arch/multiboot.c b/arch/multiboot.c
index f76e560..06990c7 100644
--- a/arch/multiboot.c
+++ b/arch/multiboot.c
@@ -5,9 +5,27 @@
 #define MULTIBOOT_1_MAGIC 0x2BADB002
 #define MULTIBOOT_2_MAGIC 0x36d76289
 
-#define MULTIBOOT_TAG_TYPE_END     0
-#define MULTIBOOT_TAG_TYPE_CMDLINE 1
-#define MULTIBOOT_TAG_TYPE_MODULE  3
+#define MULTIBOOT_TAG_TYPE_END           0
+#define MULTIBOOT_TAG_TYPE_CMDLINE       1
+#define MULTIBOOT_TAG_TYPE_MODULE        3
+#define MULTIBOOT_TAG_TYPE_BASIC_MEMINFO 4
+#define MULTIBOOT_TAG_TYPE_MMAP          6
+
+#define MULTIBOOT_MEMORY_AVAILABLE        1
+#define MULTIBOOT_MEMORY_RESERVED         2
+#define MULTIBOOT_MEMORY_ACPI_RECLAIMABLE 3
+#define MULTIBOOT_MEMORY_NVS              4
+
+struct multiboot_mmap_entry
+{
+    unsigned long long addr;
+    unsigned long long len;
+    unsigned int type;
+    unsigned int zero;
+}
+__attribute__((packed));
+
+typedef struct multiboot_mmap_entry multiboot_memory_map_t;
 
 struct multiboot_tag
 {
@@ -31,6 +49,23 @@ struct multiboot_tag_module
     char cmdline[0];
 };
 
+struct multiboot_tag_basic_meminfo
+{
+    unsigned int type;
+    unsigned int size;
+    unsigned int mem_lower;
+    unsigned int mem_upper;
+};
+
+struct multiboot_tag_mmap
+{
+    unsigned int type;
+    unsigned int size;
+    unsigned int entry_size;
+    unsigned int entry_version;
+    struct multiboot_mmap_entry entries[0];
+};
+
 static void itoa(char *buf, int base, int d);
 static void printf(const char *format, ...);
 
@@ -73,6 +108,35 @@ void print_multiboot_info(struct KernelMQ_Multiboot_Info info)
                     ((struct multiboot_tag_module *) tag)->cmdline
                 );
                 break;
+
+            case MULTIBOOT_TAG_TYPE_BASIC_MEMINFO:
+                printf(
+                    "mem_lower = %uKB, mem_upper = %uKB\n",
+                    ((struct multiboot_tag_basic_meminfo *) tag)->mem_lower,
+                    ((struct multiboot_tag_basic_meminfo *) tag)->mem_upper
+                );
+                break;
+
+            case MULTIBOOT_TAG_TYPE_MMAP:
+            {
+                printf("mmap\n");
+
+                for (
+                    multiboot_memory_map_t *mmap = ((struct multiboot_tag_mmap *) tag)->entries;
+                    (unsigned char *) mmap < (unsigned char *) tag + tag->size;
+                    mmap = (multiboot_memory_map_t *)((unsigned long) mmap + ((struct multiboot_tag_mmap *) tag)->entry_size)
+                ) {
+                    printf(
+                        " base_addr = 0x%x%x, length = 0x%x%x, type = 0x%x\n",
+                        (unsigned) (mmap->addr >> 32),
+                        (unsigned) (mmap->addr & 0xffffffff),
+                        (unsigned) (mmap->len >> 32),
+                        (unsigned) (mmap->len & 0xffffffff),
+                        (unsigned) mmap->type
+                    );
+                }
+            }
+                break;
         }
     }
 }