Unexplained keypad size behavior

[jacobly0]

Changing the keypad ports at offsets 4 and 5 always read back the new value, but don't always behave using the new value, and I haven't been able to come up with an explanation, not even writing it repeatedly seems to work with any consistency.

[mateoconlechuga]

Is this on hardware or on CEmu?

[jacobly0]

Hardware, CEmu just always uses the new value right now.