[comp.sys.amiga] Mouse Help

mikeg@pro-charlotte.cts.com (Mike Gladden) (02/18/88)

Has anyone ever sucessfully interfaced a non-Commodore mouse to the Amiga?
Specifically, I would like to be able to use the Mouse Systems PC Mouse I
currently have attached to my PC clone with my A500.  I don't particularly
care for ball-type mechanical mice and would much rather use the optical
design which has no moving parts to be cleaned all the time.
 
BTW, the PC mouse I have is the serial version, but I would like to interface
it through the mouse port with some kind of adapter plug so I don't tie up my
serial port.  Anyone who telecommunicates with the Amiga will obviously need
both the mouse and the modem hooked up at the same time.
 
What kind of signals are sent out from serial interfaced mice?  Are the
signals completely different from the Amiga mouse, or are they similar enough
what an adapter plug might be the only thing necessary?
 
Any help, even to tell me I'm crazy, would be greatly appreciated.
 
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Mike Gladden                                                    pro-charlotte
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cb1p+@andrew.cmu.edu (Chris Beasley) (02/19/88)

At first guess it seems like it would be pretty complicated to interface
a serial mouse to the Amiga mouse port because the Amiga mouse puts out
two quadrature signals which correspond to the optical encoders on the
ball.  The serial mouse has some counting logic and a UART to convert the
quadrature to a count and transmit that serially.  To make an interface of
this sort you would probably need another UART for the serial intergface and
then some way of turning the data back into quadrature.  It's possible,
however, that you could get an optical mouse with a quadrature output or
hack an existing one.

Chris