Nintendo 64 Pal to NTSC region Mod (Solved) Solution

[hidden0]

Hey guys

So far i know

There are 3 types of Video DAC/Encoder
Type 1 :
VDC-NUS
They are mostly ntsc’s anyway
Also found a guide and info here to convert them to pal

Code: Select all

https://bitbuilt.net/forums/index.php?threads/ultimate-n64-ntsc-pal-region-switch-guide.1620/[\code]

Type 2 :
DENC-NUS
[bold]Trying to find the solution and info about these Pal boards and how to convert them into ntsc.
Not able to find any info regarding this chips and boards.[/bold

Type 3 :
AVDC-NUS or MAV-NUS
Pinout :
[img]https://i.imgur.com/uDuX32X.png[/img]
Solution : Figured out how to convert these into NTSC
Just change the the crystal with NTSC one and lift the pin 21 and connect it to the ground
And you have the ntsc console.

I want to convert the pcb with DENC-NUS to ntscs

Please help.

EDIT: also found this page with quite some info but mot anything about the Pal with DENC-NUS chips.

[code]https://circuit-board.de/forum/index.php/Thread/8877-N64-PAL-NTSC-Switch-möglich/

Solution :
So in order to convert Pal N64 with DENC-NUS chip
1 : Replace the crystal with NTSC one or 14.31818Mhz
2 : Desolder the pin7 of U7 Mx8330 or MXxxxx and hook it up with 3.3v can be found on the same chip or the processor nearby.
3 : on the bottom of the board you will find the Jumpers JP2 JP3


Cut the track between JP3 And Bridge JP2 .

4 : Need to change the PIF IC from NTSC Console one if you wanna use the real cartidges and not ever drive.

[hidden0]

So far what i have tried
Swapped the x1 crystal with the ntsc one and u7 i lifted and grounded the pin 8
Getting a bad picture

https://imgur.com/a/m7j35ST


UPDATE 2 :

Update :
I tried connecting the mx8330 pin 7 to 3.3v and i got a black white screen in NTSC mode


https://imgur.com/a/BLZmu5q

Update : 3

https://imgur.com/a/GGlUEMV

There is def an incomplete pinout of DENC-NUS

So what i tried just now pulled the pin 24 High and console didn’t boot then i restored it back and then pulled the pin 13 high and got the same result as before Bad colors in NTSC roms via everdrive and no colors on pal games.

What else i can pull and try

Also tried pulling high pin 14 on DENC-NUS Getting same bad colors on ntsc and black and white on pal

[Limewater]

Sorry none of us were any help, but I appreciate you posting the solution!

[hidden0]

Sorry none of us were any help, but I appreciate you posting the solution!

I always got help from the forums so its just my way of Thanking back.

[provato]

I've been interested in PAL/NTSC correct timings (for s-video and composite output on a N64 containing the DENC-NUS) for a while now.
After finding your post, I decided to search through my n64 mainboard photos/scans, and I have to say this thread was a lot of help:
https://circuit-board.de/forum/index.php/Thread/13913-STRIP-CLUB-PCB-Scans/
Someone definitely screwed up when making the pinout image for the DENC-NUS. He got pin 21 and 22 backwards. As you can see on the pictures pin 22 is NC, pin 23 is going through capacitor c17 to +5V and pin 21 is going through resistor R28 to ground.





Now, this is just a thought, but I believe that either pin 23 or pin 21 on the DENC-NUS might be the "FSEL" pin (I mean the NTSC/PAL selector pin of the built-in encoder). If R28 is a 0 ohm resistor (or close to 0), my guess would be that pin 21 is the NTSC/PAL selector and it has to be changed together with the MX8330's (U7) pin 7 (FSEL).

But that's only a thought... I really wanted to test that theory but never got as far as you did

EDIT!: Looking at the MAV-NUS, pins 30 and 31 are also going through similar capacitor/resistor (C18 and R28) to Vcc or Ground. So my next move would be to try pin 16 on the DENC-NUS to either Vcc or GND. As you can see from my pictures this pin is connected directly to the middle pads of JP2 and JP3.

[provato]

Oh my... sorry for double posting but I just realized that you have already edited your first post with the solution! I'm a total idiot... :p
So, it was DENC-NUS pin 16 that had to be connected to Vcc in order to fully convert PAL to NTSC, right?? (together with an NTSC crystal and pin 7 of the mx8330)
That's really going to help if implemented to the ultra-pif project!

[hidden0]

Oh my... sorry for double posting but I just realized that you have already edited your first post with the solution! I'm a total idiot... :p
So, it was DENC-NUS pin 16 that had to be connected to Vcc in order to fully convert PAL to NTSC, right?? (together with an NTSC crystal and pin 7 of the mx8330)
That's really going to help if implemented to the ultra-pif project!

It’s okay and thanks for trying and help ‘ and yes it will def help
It took mai couple weeks of research and trial and error since wasn’t able to find anything simple or well documented on internet.