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asasega · (This post was last modified: 06-12-2020, 04:12 PM by Bositman.)

As you know pcsx2 implements correctly interlacing, which means that field rendered games will exhibit a shaky image(jumping up and down) compared to frame rendered games. Pcsx2 implements different de-interlacing options but still the final image is not the same as a progressive scanned game.
The codes bellow will remove this shaking, giving the game a stable image. You cand disable de-interlacing option in pcsx2(video plugin setting interlace set it to none).
Effectively we are patching the sceGsSetHalfOffset routine(luckily Devilmaycry had debug symblos left in) which is responsible for the shifting image which is necessary on a CRT to give the illusion of higher resolution.
Since people will ask how to make these codes and not everybody is comfortable with assembly(these code are, like most of my 60fps codes, assembly hacks) I devised a method for people lacking assembly knowledge.
This method will not work for every game.
When the game is running you search(the search range of course is the PS2 emulated RAM) for the following hexstring 08004264 or a 4 byte value 64420008. You should find one or two. This value is the hex for daddiu v0, v0, $0008 which is part of sceGsSetHalfOffset. We just need to nop this instruction.

Exampe:
Dead or Alive 2 Hardcore SLUS_200.71

64420008 is found @003962fc so the code is
203962FC 00000000

Ridge Racer and others are using a custom routine, so code is different.

There are two type of interlaced games. Both types operates with 240p frontbuffers, but while some operates with 240p backbuffers, others will downsample from a 480p backbuffer for some sort of antialiasing and performance reasons. For these latter categories games the codes will display this higher res 480p backbuffer(in the case that everything is rendered to this buffer).

Edit by bositman: Supplementary list of more no interlace codes collected in one post by devina: https://forums.pcsx2.net/Thread-No-inter...#pid605425

Attached in the thread are codes for

totoff28 · 07-30-2018, 12:41 AM

cool , thanks for this
continue for another games

**rama** · 07-30-2018, 03:44 PM

Very good approach to a real hassle. Nice Smile

asasega · 08-07-2018, 10:38 AM

I have a little bit of free time, you can request games

Ivan89el · 08-07-2018, 12:57 PM

(08-07-2018, 10:38 AM)asasega Wrote: I have a little bit of free time, you can request games

Tenchu Fatal Shadows/Wrath of heaven please.

Granville · (This post was last modified: 08-08-2018, 05:28 AM by Granville.)

Well i'd like to thank you first of all. I know many people adore the 60fps and widescreen hacks (myself as well), but the ability to get rid of at least the more excessive interlacing effects is also a huge benefit to the image quality. This topic could do with some extra attention and praise.

I've been enjoying Jak & Daxter using the code you made for it, and it improves the game immensely. Thankfully the two sequels don't appear to require any work, they even have a progressive option. I wanted to try the Klonoa 2 hack, but I don't have the Japanese version (only the US one, which the code doesn't work on).

The Sly Cooper trilogy is another case of having severe interlacing problems. Both Maximo games also suffer the same as well.

asasega · (This post was last modified: 02-08-2019, 08:50 PM by asasega.)

Updated the list with the requests.
I don't have access to the NTSC-US release of Klonoa2, someone will have to port it.
Can't attach more to the first post, so rest is here.

Devina · 08-08-2018, 06:25 PM

Thanks for the codes. Here's a before and after.

Before

After

**CK1** · (This post was last modified: 08-08-2018, 06:58 PM by CK1.)

So I assume these can be added like any normal patch to the archive?

Side note: Isn't interlacing "sharper" in some games due to the developers' implementation of it or is that only really noticable across platforms? Digital Foundry did a video on interlacing somewhere but I can't find it.

Granville · 08-08-2018, 08:45 PM

Thanks for the fulfilled game requests! I just tested them out and they look fantastic.

(08-08-2018, 06:38 PM)CK1 Wrote: So I assume these can be added like any normal patch to the archive?

Side note: Isn't interlacing "sharper" in some games due to the developers' implementation of it or is that only really noticable across platforms? Digital Foundry did a video on interlacing somewhere but I can't find it.

Yeah these are just normal pnach files, you can add the lines of code to existing cheat files if you want to combine them. Though personally I like to keep my widescreen cheats separate from the 60fps or no interlacing codes (there are separate folders for regular cheats and widescreen cheats).

The interlacing in PS2 games is often more intrusive than normal interlacing. Standard interlacing effects still seems to be present and probably aren't fixable with hacks (I don't know for sure). The problem is that developers often added in additional intrusive layers of interlacing as well. Making PS2 games look even more excessively blurry even on high resolutions, either that or you have to tolerate severe vertical screen shaking. These codes fix that extra layer, removing the shaking and eliminating the need for PCSX2's deinterlacing filter.

You can see in the Sly comparison images above how this cheat improves image quality. But believe me, the improvement is even more pronounced in motion.

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