Hacking Possible to Disable the Wii's (De)Flicker Filter?

[NoobletCheese]

Maybe they enabled it for the PAL ver because 50hz is a slower refresh rate and flickers even worse on a CRT than 60hz?

 

[oldmario1974]

I tested almost all vc_arcade and it seems that none works in 240p
Only sega's vc_arcade works in 240p.

 

[mive]

Maybe they enabled it for the PAL ver because 50hz is a slower refresh rate and flickers even worse on a CRT than 60hz?

unlikely as the channel shows a hint which says 60hz 480i/480p only

 

[Maeson]

Sorry for bothering you @NoobletCheese , but time ago we talked about making "16:9 only games" be full screen on 4:3. I've been trying stuff to no avail, but I found a couple of codes for DKCR and Xenoblade Chronicles, unfortunately only for the NTSC-US versions.

I would like to ask if you could try them if you have the time, to see if they really work.

Here's the link to the DKCR one.

C20CF210 00000009 3E408063 625249E0 8272001C C0228D90 2C130001 41820014 3E803F80 9282CE44 3E803F40 48000014 3E803F80 62940000 9282CE44 3E803F80 9282CE3C 60000000 60000000 00000000 C24E4930 00000002 C162CE3C ED0B4024 60000000 00000000 0408e4a0 38000001 0408e4cc 38000001 0414a064 38000001 0428892c 38000001 042897f8 38000001 042de078 38000001 042de290 38600001 042fcf34 38000001 044e4908 c162CE44

I tried with PAL , just in case it was compatible but no, it hangs the game on title screen. I'd like to port them but it seems it would take quite a lot of time and I don't have an NTSC version to compare memory addresses.

 

[oldmario1974]

Mive so it means that it will not work in 240p only in 480p?

 

[mive]

dont know if 240p is possible, but again the hint in the upper right corner says only 480i/p

 

[Maeson]

I found out a list of 240p supported games on VC:

https://docs.google.com/spreadsheets/d/1tOGfGwGbIwEkyXMcnSueRjYcRlV2X1v--XvVSY52hoA/edit#gid=0

I found it here:

https://shmups.system11.org/viewtopic.php?f=6&t=57691

Funny enough, only SEGA arcade games do support 240p. So you'll be better off playing on an emulator or something... Apparently some N64 do, but I do not know what "Chime" means. I'll read more.

 

[totakeke95]

There's a little trick to getting 240p on VC. You have to go to the electronic manual (wii home menu) and connect the nunchuk to the wii mote.
Press A+1+Z at the same time and you'll hear a high-pitched ringer and now you'll have 240p resolution in VC.
I think VC 64 doesn't work but in SNES for example yes, I don't know if in arcade or others they work too, just do the test.

 

[oldmario1974]

Does not work vc_arcade only sega games.

 

[iGom]

Just search for every occurance of 060606060606060606060606060606060606060606060606 and 03020906030A03020906030A09020306090A09020306090A in main.dol, and look at the following 7 bytes which is the vertical filter setting, according to GXRModeObj definition in https://github.com/devkitPro/libogc/blob/master/libogc/video.c

00001516150000 = no filter
08080A0C0A0808 = Ntsc480ProgSoft
04080C100C0804 = Ntsc480ProgAa
07070C0C0C0707 = Mario Kart Wii
05050F0E0F0505 = Mario Kart Wii
20002000000000 = Mario Galaxy 1&2

The number says how much to blend the source pixel with the above/below pixel.

I'm not sure why there are 3 values for the source pixel (is it the mix of RGB?) and 2 values each for above/below pixel (luma/chroma?).

In any case, we can see the leading and trailing 0's in [0000][151615][0000] means don't blend any above/below pixels, and the middle 3 numbers sum to 64 (0x40) which is the largest 6-bit value*, so the source pixel gets passed through unmolested.

* actually 63 (0x3F) if we start from 0, so I'm not sure why the middle number is 16 instead of 15.

---

I have been trying to patch Donkey Kong Country without success.

I found the block which the game uses at offset 57F306, as I can modify some of the parameters there and change display mode to interlace or split the frame in 2 like in Superrsonic's image.

By default its filter is already set to 00001516150000 (disabled) but visually it still appears a bit softened and the system menu overlays are showing that too, just like Mario Kart Wii and Mario Galaxy.

No matter what values I put in there, there is no change to the image. Also tried putting values in every other video mode block to no effect. The game appears to be completely ignoring the filter setting.

I speculate the game may be calling some other API function which sets the filter manually without referencing a GXRModeObj, so changing the GXRModeObj won't work.

I think we need to use a break point with Dolphin find the address of that function so we can patch it, but I lack the knowledge to do this. Someone like @SuperrSonic or @Extrems might know...

I know it's now possible to patch the game through WiiFlow Lite, but I'd like to do it manually just to learn the thing. But what if the *.dol file has more than one of these occurences, for example the Metroid Trilogy dols get more than one of 06060606060606060606060606060606060606060606060608080A0C0A0808
Do I have to patch all of them?

 

[Maeson]

There should be as many as video modes the devs added to the game (not necessarily support), so yeah, the normal thing is having more than one. If you're playing on Progressive Scan, probably you need only to change the one related to that video mode, but if you don't know which one it is, you can simply edit all of them.

On the dols I modified for my own use I did change all of them and had no issues.

Also, are you sure Wiiflow is capable of patching out the filter with games such as Metroid Prime Trilogy? As far as I read patching-on-the-fly that loaders can do can't really keep on the patch on games that switch between dols.

 

[iGom]

ooh, I see now, thanks.
I don't think it's capable to do it, that's why I want to do it manually!

One more question
if I disable GXSetCopyFilter entirely using this patch https://gbatemp.net/threads/possible-to-disable-the-wiis-de-flicker-filter.477163/post-9473338 is it still required to disable vfilter individually?

 

[mive]

no, just disable gxsetcopyfilter and you dont have to bother with individual vfilters.
(edit: but be aware that this can cause issues with some games, e.g. brightness setting in re4 wont work anymore)

 

[XFlak]

Hey everyone, I'm adding the new deflicker priiloader hack to ModMii, and in it's custom guides it includes a table describing each system menu hack, similar to the one seen at the bottom of this page: https://wii.guide/priiloader

This is what I have drafted so far:
Remove Deflicker: Prevents "blurring" on 480i video signals which were originally meant to prevent "flickering" on CRT TVs.

Does anyone suggest any adjustments?

 

[fledge68]

Hey everyone, I'm adding the new deflicker priiloader hack to ModMii, and in it's custom guides it includes a table describing each system menu hack, similar to the one seen at the bottom of this page: https://wii.guide/priiloader

This is what I have drafted so far:
Remove Deflicker: Prevents "blurring" on 480i video signals which were originally meant to prevent "flickering" on CRT TVs.

Does anyone suggest any adjustments?

Don't you mean prevents blurring on 480p? Interlaced TV need the deflicker or am I wrong?

 

[XFlak]

I'm not sure... I'm inclined to take your word and assume I am mistaken on this, but if someone can definitively confirm that would be great!

 

[smf]

Don't you mean prevents blurring on 480p? Interlaced TV need the deflicker or am I wrong?

I thought the deflicker was used in 480i mode to blur between odd and even lines to prevent flicker.

lcd tvs will have their own processing to deinterlace and they don't suffer from flicker, which is why you'd want to disable the deflicker.

The does however have wii has a soften filter in 480p modes.

 

[XFlak]

@NoobletCheese and @Maeson , are you able to weigh in on this plz and thank you

 

[smf]

@NoobletCheese and @Maeson , are you able to weigh in on this plz and thank you

The first post seems to explain it.

https://gbatemp.net/threads/possible-to-disable-the-wiis-de-flicker-filter.477163/#post-7443413

The deflicker is for 480i and soften is for 480p.

Which one are you describing? Or is it both?

 

[XFlak]

This
https://gbatemp.net/threads/possibl...de-flicker-filter.477163/page-18#post-9509597