Pin Z duo-se?

[dewisant]

Hi guys,
I have just chipped a V3 gh-006 pal with a duo-se.
I have a wierd problem.
When I connect pin Z the modchip fails and the dvd eject malfunctions.
I have cleaned up all around the Z point and the symptoms are the same.

The odd thing is if I leave pin Z disconnected then the duo seems to be working. I is booting up psx backups and ps2 backups?

Can anyone throw some light on this.

What does pin Z do?

This is an old ps2 given to me as a freeby and i had some spare time so I only modded it for a backup.

cheers
dewi

[EspeN]

Z point has something with RESET function to do. What exactly it does i dunno, but I know that Z and RESET are connected. Maybe someone else can light this up, but if it works with psx and ps2 dont bother with the Z since it has something with reset (maybe enable/disable chip?) to do.

[Ex-Cyber]

The "Z" signal is the eject signal. I'm not sure of the details but it's probably used to detect the eject button for mode switching / disabling and maybe to wake the chip up to reauthorize a disc after a swap...

[dewisant]

thanks for the reply guys.

Interestingly I found a similar problem after a trawl
http://www.psx-scene.com/forums/showthread.php?t=17326
http://www.psx-scene.com/forums/show...ight=eject+duo

I've brought the ps2 into work and had a thorough cleanup of the z area and resoldered the wire to the leg of the corresponding chip instead.

Will let you know the results later.
I will try adding a 10k resistor if the ps2 does not work next

I'd still be interested in further information on what are the effects on the modchip/ps2 booting up if Z is left unconnected?

cheers
al

[dewisant]

Update:
Made no difference cleaning up all around the z area.

I paralleled a 10K resistor across the 4 bank of 10k's and it now works in fashion with z connected.

I press eject to start the disk comes out and then goes back in BUT it boots ps2 backups.

Think I'll leave it there

al