Nintendo 64 Pal to NTSC conversion (Help) SOLVED

[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
https://bitbuilt.net/forums/index.php?t ... uide.1620/

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 :

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.

https://circuit-board.de/forum/index.ph ... h-möglich/

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

[NewSchoolBoxer]

This is pretty cool. I'm more into SNES scene where PAL to NTSC conversion is very well understood due to the console's greater popularity and crucial list of games with no PAL release. If you have circuit diagrams of NTSC vs PAL N64s, I'd like to see.

This page has Marshall saying NTSC N64 uses 14.31818 MHz and PAL 17.72 MHz for colorbust x4 versus SNES going x6. I'm kind of impressed 14.31818 MHz crystals still exist and are far more available than x6 ones. Or maybe I shouldn't be since dividing by a power of 2 is electrically easier.

Even on SNES to PAL conversion or dual boot, they don't change the bandpass filter for 3.58 MHz colorburst that Composite and S-Video need versus 4.43 MHz for PAL. I don't think is an issue for RGB output but N64's RGB is easy to criticize, requires modding and its composite video is relatively good.

NTSC SNES on left, PAL on right:

[hidden0]

I did find a solution finally , By Experimenting and tips from the internet .

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

[Gunstar]

Congrats on solving this. Super interesting to see this conversion. It would be nice if you could switch back to PAL if you wanted to but I'm sure there's probably a handful of reasons you might want to.

[Rulumi]

Even on SNES to PAL conversion or dual boot, they don't change the bandpass filter for 3.58 MHz colorburst that Composite and S-Video need versus 4.43 MHz for PAL. I don't think is an issue for RGB output but N64's RGB is easy to criticize, requires modding and its composite video is relatively good.

It isn't an issue with RGB as long as one bypasses the CIC locking, the games will run at 50Hz and being RGB bypasses the color encoding problems of composite and S-Video.

But with an unmodded system on both the Nintendo 64 and GameCube (using the analog video out port) things get iffy, as they'll output on NTSC-50 with PAL games, which is really not something properly supported and that works correctly in almost anything.

The GameCube analog DAC easily supports switching to PAL-M from software unlike the Nintendo 64 which requires a different crystal on the console, but since PAL-M is supposed to always be 60Hz like NTSC, it doesn't really help either with 50Hz output. And the GameCube has the digital port on the DOL-001 models anyways.