working counter

boot.s

@@ -152,18 +152,31 @@ not_eol:
 	cmp $512, %si
 	jl render_loop
 
-#	xor %dx, %dx # no need to move the cursor - it's already in a good enough place
-#	mov $0x2, %ah
-#	int $0x10
 
-# print sector number
-	mov $'0', %al
-	mov $231, %bl
+	# print sector number
+	int $0x10 # wild assumption - %ah == 0xe
+	int $0x10 # printing some garbage to make this line up
+	int $0x10
+	mov %cs:_sector_num+1, %cx
+	mov $4, %dl # loop counter
+
+	mov $231, %bl # TODO can be removed if i change the loop condition higher up
+digit_loop:
+	mov %cx, %ax
+	mov $10, %dh  # base 10
+	div %dh       # %al = quotient ; %ah = remainder
+	ror $8, %ax   # swap those around
+	add $'0', %al
+	mov %ah, %cl  # save remainder
+	xor %ch, %ch
 	mov $0xe, %ah
 	int $0x10
+
+	mov $'\b', %al # backspace two times
 	int $0x10
 	int $0x10
-	int $0x10 # TODO real number
+	dec %dl
+	jnz digit_loop
 
 
 	mov $0, %ah # read character