billsey@agora.UUCP (Bill Seymour) (03/06/90)
Well, I finally got my old Mouse Systems M2 mouse working! It turned
out to be simper than I thought. The mouse I had was an OEMed version that
supported serial only. There was a missing IC, two missing resistor packs
and a missing connector (ten pin) on the little board inside.
The IC turned out to be a simple inverter, used to switch between
button up and button down on the three buttons. I put a 74HC14 in. The two
resistor networks were both pullups, with each resistor pulling up one of
the signal lines. I used 10K SIPs there. The ten pin connector was the only
tough part, and a little logic (and trial/error) got me through it. The
buttons were easy, the +5V and GND were easy, and that only left the four
direction lines. A little trial and error found them out...
The pinouts of the ten pin connector are:
1 N/C
2 Horizontal Pulse
3 +5V
4 Vertical Pulse
5 Button #1 (Left)
6 Vertical Quadrature
7 Horizontal Quadrature
8 Button #2 (Center)
9 Button #3 (Right)
10 Ground
I used about 18 inches of flat ribbon cable to go to the Amiga, with a big
glob of hot glue to give me something to hang onto when unplugging the thing.
And it all works like a charm!
Bill
--
-Bill Seymour ...tektronix!reed!percival!agora!billsey
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