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Path: utzoo!attcan!uunet!bloom-beacon!usc!cs.utexas.edu!hellgate.utah.edu!uplherc!esunix!blgardne
From: blgardne@esunix.UUCP (Blaine Gardner)
Newsgroups: comp.sys.amiga,comp.sys.amiga.tech
Subject: Re: Need help with Joystick/Mouse switchbox...
Message-ID: <1539@esunix.UUCP>
Date: 21 Sep 89 13:45:25 GMT
References: <7955@cbmvax.UUCP>
Organization: Evans & Sutherland Computer Corporation
Lines: 26

From article <7955@cbmvax.UUCP>, by kevin@cbmvax.UUCP (Kevin Klop):
> In article <508@aucis.UUCP> andrew@aucis.UUCP (Andrew Gillham) writes:
>>A friend of mine is trying to build a switchbox to switch the mouse and
>>Joystick on port 1.
> [Lots of pinouts deleted.]

What about just switching power and ground? Since the joystick switches
are all wired from their output to ground, opening the ground lead will
completely disable it. The mouse requires both power and ground, so
opening those two will disable it.

There is one possible problem with this idea though. Does an unpowered
mouse put enough drain on any of the lines to activate them? Since a
DPDT (double-pole, double-throw) switch is cheap, it might be worth a
try.

But what I'd really suggest is buying a DB-9 switchbox. A number of
places that advertize in Computer Shopper sell them, some quite cheaply
too. 


-- 
Blaine Gardner @ Evans & Sutherland    580 Arapeen Drive, SLC, Utah 84108
Here: utah-cs!esunix!blgardne   {ucbvax,allegra,decvax}!decwrl!esunix!blgardne
There: uunet!iconsys!caeco!i-core!worsel!blaine  (My Amiga running uucp)
"Nobody will ever need more than 64K."    "Nobody needs multitasking on a PC."