Ha, ha...!. Too squishy, Tuby128...
Prodatron, have you seen
this thread?
There are the schematics of an easy to build mouse interface to attach directly a MSX mouse.
And another thing: in the Enterprise mouse reading subroutine I gave you, I've discovered that the four delays(8,5,5,5) can be changed to 8,1,1,1 for a 4Mhz Z80 without problems. Then it has similar delays to the timing of a MSX machine.
The only difference between a MSX mouse and a Neos mouse(besides of the position of the pins) is an inverter inside the MSX one. The
Strobe signal is exactly the same but inverted, when on one is 0v the other has 5v.