diff --git a/bootloader/bios/memory.asm b/bootloader/bios/memory.asm
index e0f9a2d..c045054 100644
--- a/bootloader/bios/memory.asm
+++ b/bootloader/bios/memory.asm
@@ -1,20 +1,23 @@
 ; SRs to find memory size and leave it as a "note" for the kernel
+[org 0x0000]
+
+sig_0x15: db "SMAP"
 
 ; Descriptor Table for address ranges
-;addr_rng_dt_start:	
-;	addr_rng_low: dd 0
-;	addr_rng_high: dd 0
-;	addr_rng_len_low: dd 0
-;	addr_rng_len_high: dd 0
-;	addr_rng_type: dd 0
-;addr_eng_dt_end:
+addr_rng_dt_start:	
+	addr_rng_low: dd 0
+	addr_rng_high: dd 0
+	addr_rng_len_low: dd 0
+	addr_rng_len_high: dd 0
+	addr_rng_type: dd 0
+addr_eng_dt_end:
 
-;map_phys_mem_init:
-;	mov ebx, 0
-;map_phys_mem:
-;	mov eax, 0xe820 ; Function code
-;	mov es, 
-;	mov edx, "SMAP" ; Signature
-;	int BIOS_PMEM_INT
+map_phys_mem_init:
+	mov ebx, 0
+map_phys_mem:
+	mov eax, 0xe820 ; Function code
+	mov es, addr_rng_dt_start
+	mov edx, sig_0x15 ; Signature
+	int BIOS_PMEM_INT