diff --git a/code.asm b/code.asm
index 820546d..da44241 100644
--- a/code.asm
+++ b/code.asm
@@ -6,7 +6,7 @@
 ; ==============================================================================
 
 %ifdef DEBUG
-%include "debug_macros.mac"
+%include "debug_macros.asm"
 %endif
 
 ; ==============================================================================
diff --git a/debug_macros.asm b/debug_macros.asm
new file mode 100644
index 0000000..e04fba4
--- /dev/null
+++ b/debug_macros.asm
@@ -0,0 +1,24 @@
+%macro print_reg 1
+	mov dx, %1
+	mov cx, 16
+print_reg_loop:
+	push cx
+	mov al, '0'
+	test dh, 10000000b
+	jz print_reg_do
+	mov al, '1'
+print_reg_do:
+	mov bx, 0x0006             ; page = 0 (BH), color = gray on black (BL)
+	mov ah, 0x09               ; write character stored in AL
+	mov cx, 1
+	int 0x10
+	mov ah, 3                  ; move cursor one column forward
+	int 0x10
+	inc dx
+	mov ah, 2                  ; set cursor
+	int 0x10
+	pop cx
+	shl dx, 1
+	loop print_reg_loop
+	jmp $
+%endmacro