--- On Thu, 12/10/09, Doug McNutt <[email protected]> wrote:
> Macintosh Family Hardware Reference
> Addison Wesley 1988 tells all.
>
> 1 GND
> 2 +5 V
> 3 GND
> 4 MSE.X2 Mouse X2
> quadrature signal
> 5 MSE.X1 Mouse X1 interrupt
> signal
> 6 NC
> 7 MSE.SW Mouse switch
> 8 MSE.Y2 Mouse Y2
> quadrature signal
> 9 MSE.Y1 Mouse Y1
> interrupt signal
>
> There is a decent three-D picture showing the optical
> lamps, sensors, and timing on page 4-2.
>
> It would be a real labor of love to hook up a more modern
> mouse that has counters internal to it and only transmits a
> pair of counts over a serial port when asked. The Mac Plus
> depends on an interrupt every time the aperture disk moves
> enough to make a photocell change state. The quadrature line
> is just to show which direction the mouse is moving when the
> interrupt occurs.
>
> Perhaps remounting the internals of an old style mouse in a
> more pleasing plastic shell?
ISTR an old article about connecting a PC bus mouse to a Mac. The original Mac
mouse is "dumb". It's just a switch and a pair of rotary encoders. The "smarts"
for it are in the computer. Not surprising when the original mouse invented at
Xerox PARC worked that way.
ADB, Serial, PS/2 and USB mice are "smart", their processing is in the mouse.
--
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