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Old 13 March 2018, 19:58   #1
KONEY
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Question Problem with mouse on A600

Guys, I've got a really annoying mouse problem on my Amiga 600 + Vampire 2. Basically when I move it pointer would randomly move in any direction and random mouse buttons get pressed. It happens in workbench and in boot menu so I exclude it can be caused by some program.

So far I have:
checked with other mouses
had a full recap of the motheboard
replaced both CIAs

but the problem persists. I was quite sure replacing the CIAs would resolve the issue but no luck so far...

Any idea, please?
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Old 14 March 2018, 00:19   #2
idrougge
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Does this happen without Mr Vampire as well?
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Old 14 March 2018, 10:04   #3
KONEY
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I didn't check because I got rid of the kickstart rom, but I'll try since you suggest, thanks!
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Old 17 March 2018, 03:55   #4
KONEY
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OK, no Vampire: same problem...
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Old 17 March 2018, 04:53   #5
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Also, I tried this little program http://aminet.net/package/util/misc/jswap and changed the porf for mouse but the problem persists.
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Old 17 March 2018, 10:24   #6
Toni Wilen
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CIAs don't control mouse movement (CIA = left/fire button, Paula = second/third button, Denise = movement).

Most common reason for joystick direction/mouse movement problems is damaged TTL chip between mouse ports and Denise. (A500 = U15, A600 = U34)

But in your situation it can't be the cause because it can't explain random button presses.

Possibly bad power/ground connection?
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Old 17 March 2018, 13:57   #7
MigaTech
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Have you checked the DE9 port itself? Also look for any trace problems. It could be a short or loose PCB pin. Is the other DE9 working OK?
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Old 18 March 2018, 23:15   #8
volvo_0ne
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I had a similar problem (except the button press issue) AND it was just the same with my spare mouse.

I cured it by buying a PS2/usb (inc mouse) converter from Ebay which worked a treat.

I think it was only about £15 or so but it fixed the problem (strangely BOTH original mice exhibited exactly the same fault) .

Not sure if you want to go this route, but it worked for me.
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Old 18 March 2018, 23:26   #9
robinsonb5
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Are you using a real Amiga mouse or a PC mouse with an adapter?
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