read state of pcf after a reboot

hi renzo, i am going to use the pcf as a replacement for mcp23017. all ports are outputs (16). when using the mcp, pinmode putput, i can still read the registers state with readgpioab. this is very useful after a reboot to know in which state the mcp pins are (high or low). is it also possible to do the same with pcf? get the state of all outputs after a reboot? tnx for your help. mike