Duo 3 Modchip
 

I've just ordered one of these from modchip-store.co.uk, i know these are compatible with a v4 ps2 which i have but, i was looking at install guides for it and theres either a "gap bios" guide or a "no gap bios" guide

make sure you solder a resistor across the power pad of the chip to the Ground pad of the chip. it speeds of boot time. i'll have to dig up info on what size the resistor was. i think 1k.

Correct - there are 2 types of BIOS on a v4 PS2 - Gap and No-Gap.

Essentially, a No-Gap BIOS looks like any standard BIOS chip from any other PS2. However, a gap BIOS has the pins in the centre missing from both sides, creating a 'gap' between the pins. The only way to tell is to open the PS2 and look at the BIOS chip itself. Then, use the corresponding diagram relating to your PS2...

|||||||||||||
-------------

NO-GAP BIOS

-------------
|||||||||||||


|||||<GAP>|||||
----------------

GAP BIOS

----------------
|||||<GAP>|||||

As for the resistor between the Power and Ground - you are correct: it's 1k. :)

can anyone do me a diagram or a picture of what the chip should look like once installed and are these chips good (its a bit too late i know but oh well)

duo3 gold flash upgrade
 

I bought duo3 gold mod chip and I install on my ps2 slim v16, I just want to learn duo3 does its need to flash upgrade like dms4?? Or doesn’t need any flash upgrade, if its need upgrade can you advise me which flash should I use and where can I download

thanks

Should work straight out of the packet mate - no flash upgrades needed.