PS2 Mouse

9 Feb 2003

...
   I'm pretty
sure I've seen ISA PS2 cards.  I'll have to check next 
 time I go on a Geekware Scavenger Hunt.  :)

 Seems reasonable, since there are 8086, 286, and 386 systems that 
 have PS2 ports.  
 I have never seen them, the PS-2 ports were controlled by the keyboard
 controller chip, if I remember correctly, so I would think it would be 
While this is true on the genuine PS/2 machines (and the mouse protocol 
is very similar to a PC/AT or PS/2 keyboard protocol), there's no reason 
why it _has_ to be. It would be possible to make an ISA card with a 
programmed microcontroller on it (maybe an 8042, like the keyboard 
controller) with the host port at some otherwise unused I/O address, and 
then use a special driver (similar in concept to the serial and bus mouse 
drivers) to access it.

-tony

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PS2 Mouse