os_set_graphics_mode:
	pusha

	mov ah, 00h
	mov al, 13h
	int 10h

	popa
	ret

; --------------------------------------

; x_end
; y_end
; x_start
; y_start
; colour
os_draw_graphical_rectangle:
	pusha

	; Tell BIOS we're changing 'da pixels!
	mov ah, 0Ch

	mov al, 1100b

	mov cx, [x_start]
	mov dx, [y_start]

	jmp .x_loop

	.x_loop:
		int 10h
		cmp cx, [x_end]
		je .next_row
		inc cx
		call .x_loop

	.next_row:
		mov cx, [x_start]
		cmp dx, [y_end]
		je .finish
		inc dx					; Increase Row
		call .x_loop

	.finish:
		popa
		Iret