Even if true, 256 would be a waste of the range. 255 would make sense if trying to stay in one byte, using a whole different data type to get one extra bit just to hold 256 instead of saying “screw it, let’s go to 511” even while using other bits.
It’s just a very weird thing to do to pick 256 as a value limit back in those days (also oddly specific now, but for different reasons)
Even if true, 256 would be a waste of the range. 255 would make sense if trying to stay in one byte, using a whole different data type to get one extra bit just to hold 256 instead of saying “screw it, let’s go to 511” even while using other bits.
It’s just a very weird thing to do to pick 256 as a value limit back in those days (also oddly specific now, but for different reasons)