A very useful cheap and cheerful IR remote control is let down by somewhat
inadequate memory.
http://www.amazon.co.uk/
7dayshop-Universal-Control-Learning-Function/dp/B0043VTRAQ

it uses a 24LC32B
Is it likely or unlikely that if I changed it to a 128, that the firmware on
the ucontroller would limit the running to 32K/ not work at all or allow
running out to 128K ?
As serial linkage I'm hoping it would not be limited