Re: Three button mouse on a mac?

[Info-Mac]

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From: info-mac@uw-beaver (info-mac)
Newsgroups: fa.info-mac
Subject: Re: Three button mouse on a mac?
Message-ID:
Date: Wed, 15-Aug-84 16:10:13 EDT
Article-I.D.: uw-beave.1471
Posted: Wed Aug 15 16:10:13 1984
Date-Received: Thu, 23-Aug-84 00:54:21 EDT
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Organization: U of Washington Computer Science
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From: Kirk Kelley
We wish to solve this problem too. We are currently using a little box with a
Z80. It is manufactured in small quantities to interface a Hawley mouse and
chord board (for the empty hand) to the IBM PC and Zenith 100. The box can
change to different settings and modes by receiving instructions back from the
PC. For the PC the keyboard, mouse and chordboard all three plug into the box
which then plugs directly into the keyboard port. The Zenith was a little
trickier since it does not have a detachable keyboard.

For the MAC there may be better ways to solve this problem, but we dont have the
inside mac documentation. Assuming there is nothing on the mouseport inside the
mac to sense any currently unused pins, one idea is to use the existing MAC
mouse port for coordinates and one button. Then put the other buttons into a
different port on the back or into the keyboard port. There are a couple of
things we would like to know.

Are there four unused codes we can send to indicate the other two mouse
button up/down states?

Is there some way to send info from the mac back to the keyboard port so the
box can set its modes?

-- kirk