All Amigas, from A1000 to CD32, share the same CIAs, only difference is that package.
One of them caters the parport and the keyboard, while the other does serial and floppy (in combination with Paula).
The slow serial bus might be just due to slow setting in the prefs, but if it is really a HW-prob, and he still has the non-working floppy ....
Problem is you just can't replace the SMD-CIAs in any reasonble way :-x
