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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: Amigaz on August 28, 2007, 12:04:07 PM

Title: Non working joyport
Post by: Amigaz on August 28, 2007, 12:04:07 PM

I recently joined the A4000T club  :-D

But after trying some gaming on my A4000T I noticed the joyport is dead  :boohoo:  and I can't see any visual damage anywhere after stripping the computer down to the bare motherboard

Anyone have a clue what can be faulty?

Title: Re: Non working joyport
Post by: alexh on August 28, 2007, 12:19:00 PM

Joystick ports not working can mean Paula custom chip failure.

How is the sound?

I have a feeling that joystick ports not working can also be an indicator of CIA failure but I am not 100% sure.

Title: Re: Non working joyport
Post by: Amigaz on August 28, 2007, 12:28:59 PM

The sound is excellent

Might be high time to send this card to our french professor Jean Jacques Boulet

Title: Re: Non working joyport
Post by: alexh on August 28, 2007, 12:36:03 PM

Have a talk to him, perhaps he can point you in the right direction without sending him anything?

Title: Re: Non working joyport
Post by: Amigaz on August 28, 2007, 12:44:46 PM

Quote

alexh wrote:
Have a talk to him, perhaps he can point you in the right direction without sending him anything?

mmm..right

Gonna send him an email

Feels very annoying to have a dead joyport....my plans was to cut down my Amiga collection drastically and keeping just this  "A4000"

Title: Re: Non working joyport
Post by: alexh on August 28, 2007, 01:09:56 PM

If you are ever selling a CSMKIII or CSPPC gimme first offers pwease ;)

Title: Re: Non working joyport
Post by: Amigaz on August 28, 2007, 01:22:01 PM

Quote

alexh wrote:
If you are ever selling a CSMKIII or CSPPC gimme first offers pwease ;)

Will do  ;-)

First runners up for selling will probably be a CS MKII '040 + '060
A4000 motherboard...maybe two of them, a Micronik A4000 tower

Title: Re: Non working joyport
Post by: JimS on August 28, 2007, 02:43:54 PM

I'm away from my home base this week, so I don't have my schematics handy. But I believe the joystick directional signals go through a multiplexer chip before going to Paula. That way, both joysticks can be read by the same 4 bits on Paula. If I recall, it's a 74LS157.

Quote

Title: Re: Non working joyport
Post by: Flashlab on August 28, 2007, 04:47:25 PM

If you're selling a grex or CV-PPC let me know ;-)...

Title: Re: Non working joyport
Post by: Amigaz on August 28, 2007, 05:22:02 PM

Quote

Flashlab wrote:
If you're selling a grex or CV-PPC let me know ;-)...

Isn't the PIV fast enough in MorphOS?  ;-)

Title: Re: Non working joyport
Post by: Flashlab on August 28, 2007, 05:38:49 PM

Actually I'm quite impressed with how it performs; dragging windows is fast and even DoomAttack is fast (and that is with 68k emulation!). But I'd like to try some 3D stuff (in MOS and/or AOS).

I wonder though if PPC native PIV drivers for MOS would make it even faster.